The static pressure sensor or static pressure transmitter is based on atmospheric pressure or absolute vacuum, and compares the difference between the measured pressure and atmospheric pressure or absolute vacuum.
The application of Static Pressure Sensors and Transmitter in industry is not only to measure the pressure of pipelines or tanks, but also to measure liquid level. Let’s look at it in detail below.
Static pressure sensors are often used to measure static air pressure. Such as the static pressure on air filters and cooling coils, the input and discharge pressure of blowers, etc.
In ventilation systems, static pressure is the pressure of the air inside the building relative to the air outside when the exhaust fans are turned on. Measuring and maintaining proper negative pressure allows ventilation systems to more effectively mix outside air with inside air.
Types
Diaphragm pressure sensors are based on the structure of the sensor. According to the sensing principle, diaphragm pressure sensors can be divided into different types such as piezoresistive, strain gauge, inductive, capacitive, and piezoelectric.
Among the above-mentioned pressure sensors with different principles, piezoelectric pressure sensors are only suitable for measuring dynamic pressure, so dynamic calibration is required;
Other dynamic and static pressures can be measured, and the most widely used one belongs to the quasi-static measurement with very low frequency. Therefore, static calibration is the most widely used calibration form. When the measured pressure frequency band is wide, all kinds of pressure sensors should be calibrated for frequency response.
Hydrostatic level transmitters are based on the principle that the measured static pressure of a liquid is proportional to the height of the liquid. A device that converts static pressure into electrical signals by using the piezoresistive effect of diffused silicon or ceramic sensitive elements.
After temperature compensation and linear correction, it is converted into 4-20mADC standard current signal output.
The sensor part of the submersible static pressure liquid level transmitter can be directly put into the liquid. The transmitter part can be fixed by flange or bracket, which is very convenient to install and use.
For deep well level measurement, especially deep wells, we recommend submersible hydrostatic level transmitters.
The submersible hydrostatic pressure level transmitter is based on the principle of hydrostatics, which is converted into liquid level height through the measurement of liquid pressure. Fully sealed submerged measurement, integrated structure and standardized output signal. It provides convenience for on-site use and automatic control.
Then through reasonable selection and design of liquid-wetted materials, cables, protective tubes, etc. The liquid level of different media can be measured. It is suitable for deep mine liquid level measurement, groundwater level, hydrological detection, long-term underwater measurement of reservoirs, rivers, oceans, etc.
It is very important to ensure the full water level of the fire water tank and the high fire water tank, and to be able to monitor remotely in the fire control room.
Using the drop-in water level sensor, the water level probe is directly put into the bottom of the fire pool or water tank. In the fire control center, the real-time water level of the fire water tank can be monitored in real time. It also has a high and low liquid level alarm function to ensure that the fire water tank operates at a full water level.
Sino-Inst offers reliable pressure transmitter, level transmitter, and flowmeters for fire water tank/water treatment monitoring applications. Such as water management, sewage treatment, water purification treatment, etc.
High Temperature Pressure Sensor is used in industrial fields such as water plants, oil refineries, sewage treatment plants, building materials, light industry, machinery, etc. to achieve the measurement of liquid, gas and vapor pressure.
Cryogenic pressure transducer has small size, high measurement accuracy, high dynamic response frequency, strong corrosion resistance and long working life.
Our professional technical group provides you with customized services. This product is mainly used for: low temperature scientific experiment, liquid Oxygen, liquid nitrogen, liquid hydrogen, liquid helium, etc. Pressure and low temperature measurement of cooling tanks, cryogenic storage tanks, propellants, etc. Cryogenic storage tanks for aerospace, aviation, naval vessels, etc.
Most of our liquid level sensors can output liquid level signals, such as 4-20mA signal, 0-10V signal, RS485 and so on.
However, the liquid level transmitter alone cannot calculate the liquid volume of tanks of different sizes. It’s too complicated. A separate recorder is required to calculate it.
Therefore, the digital display volume meter can collect, display and convert the liquid level of various regular and irregular tanks in the industrial field into the corresponding tank volume. It is suitable for monitoring, controlling and collecting various process parameters.
Ship Ballast Tank is to point to the ship’s ballast tank to load ballast to adjust the ship’s draft and metacentric height. It is an operation to ensure that the…
Updated: April 23, 2026 A pressure gauge gives you a number on a dial. A pressure transmitter sends a 4-20 mA signal to a control system. That single sentence drives…
Updated April 20, 2026 by Sino-Inst Engineering Team A 4–20 mA pressure transmitter with “no output” looks like a dead sensor, but it almost never is. In our field records,…
What is a gas pressure sensor? Gas Pressure Sensors are also called Gas Pressure Transducers. Gas Pressure Sensors convert gas pressure into standard electrical signals, such as 4~20mADC. Measurement, indication…
Water Pressure Sensors Water Pressure Sensors refers specifically to instruments used to measure the pressure of tanks, pipes or underground water. Also called Water Pressure Transducers, or Water Pressure transmitters…
Pressure Sensor Applications refer to industrial pressure transmitters that convert gas, liquid and other pressure parameters into standard electrical signals (such as 4~20mADC, etc.). For on-site or remote measurement and…
Flow Pressure Transducers are measurements of fluid pressure within a pipeline. When fluid flows through a pipe, pressure acts on the pipe wall. The medium in the pipeline can be…
Updated April 2026 — By Sino-Inst Engineering Team Wiring a pressure transducer correctly is the difference between a clean 4–20 mA signal and hours of troubleshooting. The three wiring configurations…
Sino-Inst is a manufacturer of Static Pressure Sensor and Transmitters. We offer more than 50 types of pressure sensors. Main products include compact pressure transmitters, industrial pressure transmitters, differential pressure transmitters, single pressure crystal silicon transmittance pressure transmitters, diff pressure transmitter, high temperature pressure transmitter, explosion-proof pressure transmitter, pressure transmitter, custom pressure transmitter, with remote pressure transmitter, 316 diaphragm pressure transmitter.
The static pressure sensor or static pressure transmitter is based on atmospheric pressure or absolute vacuum, and compares the difference between the measured pressure and atmospheric pressure or absolute vacuum.
For static, slowly changing pressure measurement. The sensor usually uses a high stability, thin film piezoresistive sensing element. The stability of the sensor and the accuracy of the measurement can meet the requirements of the industrial control field. There are a variety of connectors, electronic connections, signal output formats, accuracy and a wide range of ranges to choose from. These components are an ideal match for process monitoring and control, liquid level measurement, hydraulic system test studies and test cell requirements.
Sino-Inst’s entire team is well trained, so we can ensure that each customer’s needs are met. If you need any help with your product requirements, whether it is a Static Pressure Sensor and Transmitter, level sensors, or other equipment, please give us a call.
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Wu Peng, born in 1980, is a highly respected and accomplished male engineer with extensive experience in the field of automation. With over 20 years of industry experience, Wu has made significant contributions to both academia and engineering projects.
Throughout his career, Wu Peng has participated in numerous national and international engineering projects. Some of his most notable projects include the development of an intelligent control system for oil refineries, the design of a cutting-edge distributed control system for petrochemical plants, and the optimization of control algorithms for natural gas pipelines.
Ship Ballast Tank is to point to the ship’s ballast tank to load ballast to adjust the ship’s draft and metacentric height. It is an operation to ensure that the ship has good seaworthiness. Water is commonly used as ballast.
In bulk cargo transportation, since the cargo flow is usually one-way, the ship has to sail for a long distance without a load. In order to obtain the necessary draft to ensure the efficiency of the propeller and to obtain the necessary metacentric height to ensure safety. The ship must be loaded with a large number of of ballast water.
Ballast water is critical to the safe and efficient operation of shipping. Wing and double bottom tank ballast water level measurement is used to control trim, draft and heel of ships, reduce hull deformation and improve empty space seaworthiness.
At the same time, ballast water poses a serious threat to marine ecology, economy and public health. In order to protect the ecological environment, protect public health and property safety. According to the International Maritime Organization regulations, ships must be equipped with ballast water treatment equipment.
The ship ballast water system varies according to the type, purpose and tonnage of the ship. The location, size and number of ballast water tanks on the ship also vary. Generally, ships can use the fore peak tank, stern peak tank, double bottom tank, side tank, top side tank and deep tank as ballast water tanks, and cargo oil tankers can use cargo oil tank and ballast tank.
There are three types of pipeline layout for ship ballast water system: branch pipe type, main pipe type and pipe tunnel type;
The suction pipe in the ship’s ballast water tank should also have the function of adding water;
The ballast suction port of each ballast water tank shall be arranged at a position conducive to the discharge of ballast water;
In order to meet the working characteristics of the ballast water system and simplify the pipeline. The barge valve box is often used to adjust the ballast water in each ballast water tank;
The ship’s ballast water system shall be able to transfer the ballast water in and out of each ballast tank of the whole ship or transfer each other. Also can not use ballast pump, outboard seawater flows into ballast water tank automatically by pressure difference.
There are many types of ballast water management systems, all of which require measurement of incoming water flow, tank level and system pressure for control purposes. Since these instruments are essential, reliability and stability are an absolute must.
In addition to ballast water systems, Sino-Inst can also provide professional monitoring solutions for different systems such as water circulation cooling systems, ship water supply and ship sewage treatment.
A pressure transducer (Pressure Transducer) is a device or device that can sense pressure signals and convert the pressure signals into usable output electrical signals according to certain rules.
A pressure sensor usually consists of a pressure sensitive element and a signal processing unit. According to different test pressure types, pressure sensors can be divided into gauge pressure sensors, differential pressure sensors and absolute pressure sensors.
Pressure sensor is the most commonly used sensor in industrial practice. It is widely used in various industrial automatic control environments, involving water conservancy and hydropower, railway transportation, intelligent buildings, production automatic control, aerospace, military industry, petrochemical, oil wells, electric power, ships, machine tools , pipeline and many other industries.
The first type of pressure sensor commonly used on ships is the pressure sensor that measures the pressure of pipes and tanks. Pressure measurement for ships and other long-term operations in relatively harsh environments such as seawater and river water.
The sensor has a solid measuring element, which is not afraid of the influence of marine microorganisms, sediment, etc. on the sensor. IP68 protection level, 316L, titanium alloy outer shell, can work stably and reliably for a long time. It is widely used in the fields of ship ballast tank, ship boiler liquid level, pressure and other fields. It can simplify measurement and improve work efficiency.
Ballast water (ballast water) is water specially injected to keep a ship balanced. Ballast water is an important guarantee for the safe navigation of a ship, especially for a ship that does not carry an appropriate amount of cargo. An appropriate amount of ballast water can ensure sufficient draft of the ship’s propeller, minimize the shaking of the ship’s hull caused by the ship’s wake, and maintain propulsion efficiency.
Corrosion-resistant contact liquid level meters and non-contact liquid level meters can be used on ships to provide effective monitoring for Ship Ballast Tank liquid level management.
Updated: April 23, 2026 A pressure gauge gives you a number on a dial. A pressure transmitter sends a 4-20 mA signal to a control system. That single sentence drives…
Updated April 20, 2026 by Sino-Inst Engineering Team A 4–20 mA pressure transmitter with “no output” looks like a dead sensor, but it almost never is. In our field records,…
What is a gas pressure sensor? Gas Pressure Sensors are also called Gas Pressure Transducers. Gas Pressure Sensors convert gas pressure into standard electrical signals, such as 4~20mADC. Measurement, indication…
Water Pressure Sensors Water Pressure Sensors refers specifically to instruments used to measure the pressure of tanks, pipes or underground water. Also called Water Pressure Transducers, or Water Pressure transmitters…
Pressure Sensor Applications refer to industrial pressure transmitters that convert gas, liquid and other pressure parameters into standard electrical signals (such as 4~20mADC, etc.). For on-site or remote measurement and…
Crude oil measurement is important to the petrochemical industry. To control costs and improve efficiency. Effective crude oil level measurement regulation has become a challenge for many plants. If you’re…
Sludge Blanket Level Detectors use ultrasonic technology, so they are also known as ultrasonic mud level meters. Ultrasonic Sludge Blanket Level Detector uses ultrasonic emission with echo analysis of solids…
Diesel Level Sensors are used in Fuel Tank\Oil Depot. By accurately measuring the level data of the oil tank, it can effectively manage the inflow, sale and storage of oil…
Choosing an ultrasonic level sensor for diesel tanks is a tank-geometry problem before it is a sensor-spec problem. The same 4–20 mA transmitter that reads cleanly on a 3 m…
Flow Pressure Transducers are measurements of fluid pressure within a pipeline. When fluid flows through a pipe, pressure acts on the pipe wall. The medium in the pipeline can be…
A cryogenic level sensor measures the liquid level of nitrogen, oxygen, argon, hydrogen, or LNG inside vacuum-jacketed (VJ) tanks at temperatures between −162 °C and −253 °C. Because every cryogen has its…
Sino-Inst is a manufacturer of pressure sensors and liquid level sensors. We offer a wide range of transmitters for marine vessels (drilling platforms, ship ballast tanks, seawater pressure, seawater level).
If you have any technical questions, please feel free to contact our sales engineers.
Request a Quote
Please enable JavaScript in your browser to submit the form
Wu Peng, born in 1980, is a highly respected and accomplished male engineer with extensive experience in the field of automation. With over 20 years of industry experience, Wu has made significant contributions to both academia and engineering projects.
Throughout his career, Wu Peng has participated in numerous national and international engineering projects. Some of his most notable projects include the development of an intelligent control system for oil refineries, the design of a cutting-edge distributed control system for petrochemical plants, and the optimization of control algorithms for natural gas pipelines.
Gas Pressure Sensors are also called Gas Pressure Transducers. Gas Pressure Sensors convert gas pressure into standard electrical signals, such as 4~20mADC. Measurement, indication and process adjustment are carried out by supplying secondary instruments such as indicating and alarming instruments, recorders, and regulators.
Gas pressure measurement is widely used in the field of industrial process control for process control and monitoring. Different gases have different properties, so different pressure sensors and transmitters are required to measure different gas pressures. For example, measuring oxygen, hydrogen, chlorine, compressed air, high temperature gas, etc.
Gas pressure sensors are designed (or configurable) to measure gas pressure in different ways. In industrial settings, they can be used to measure the velocity of gas flow (sometimes called “shock pressure”), confirm the presence of suction, manage source pressure, or test for leaks.
(1). Gauge pressure is measured relative to ambient atmospheric pressure. Atmospheric pressure at sea level is about 100kPa (14.7 PSI). Sensors built into tire air pumps measure pressure this way, showing the air pressure inside the tire relative to the local atmospheric pressure. A reading of zero indicates equal internal and external pressure.
(2). Sealed air pressure sensors are similar to gauge air pressure sensors. But are pre-calibrated to measure air pressure relative to sea level atmospheric pressure. Therefore, if the device is taken to a different altitude or location, its readings will not change. More about: Diaphragm pressure gauge working principle.
(3). Vacuum pressure is a measure of the negative difference between the gas pressure at a given location and the atmospheric pressure.
In addition to gas pressure detection, we also provide Industrial Gas Measurement with Digital Gas Mass Flow Meters.
(4). Absolute air pressure is measured from zero or perfect vacuum (0 PSI). Again, unlike gauge pressure, this is not affected by the conditions surrounding the device. These conditions will vary with altitude and other factors.
(5). Differential pressure is the difference between two gas pressures. For example, the pressure difference in two gas hoses connected to the sensor. As with gauge pressure, a sensor may be able to measure changes in air pressure in either direction (i.e. positive or negative).
In addition to different types of measurements, some barometric pressure sensors are also designed to measure rapid pressure changes in dynamic environments. For example combustion pressure in engine cylinders or gas turbines.
Oxygen plays an important role in the smelting process, chemical industry, national defense industry, and medical care. However, the production and use of oxygen is extremely prone to combustion and explosion.
According to the mechanism of combustion and explosion “three elements” (combustibles, oxidants, excitation energy). The stronger, the more dangerous. Potential excitation energy sources for combustion or explosion are generally in the following ways: friction, compression heat, impact force, electric arc, resonance, etc.
During the construction of industrial oxygen pipelines, multi-channel cleaning processes such as rust removal, scrubbing, sandblasting, blowing, degreasing, pickling, etc. should be carried out to remove oil and impurities in the pipelines so that they can meet the conditions for transporting oxygen media. And in accordance with relevant standards Check and accept. It can be used only after passing the test.
For oxygen pressure measurement, choosing a clean instrument filled with inert oil not only improves the safety level, but also greatly reduces the risk of economic and time loss caused by maintenance or failure replacement.
The pressure sensor for oxygen measurement supplied by Sino-Inst is required for the application of oxygen pressure measurement. The sensor product is filled with Fluorolube® oil. At the same time, oil-free technology is used for production. Finally, the sensor and transmitter are cleaned and packaged according to the oxygen level cleaning process.
The above sensors can be used in hazardous locations, including explosion-proof, intrinsically safe products. And it can be used in the occasions involving oxygen pressure measurement such as factories and hospitals.
The special pressure sensor for oxygen measurement must be cleaned strictly by oxygen grade cleaning process. Ensure that the sensor is clean and free of oil, corrosion, scaling, particles and other impurities. During the oxygen pressure measurement process, the potential risk of oxygen combustion or explosion caused by sensor oil pollution is completely solved.
Oxygen grade cleaning operations must be carried out in a dust-free and clean environment. To be operated by trained and qualified professionals. Use a special cleaning agent to clean the sensor and its accessories. Cleaning needs to go through multiple processes such as soaking, wiping, scrubbing, rinsing, drying, and sealing packaging. At the same time, during the cleaning process, special inspection equipment and precision instruments are used to conduct qualitative and quantitative inspections of the oil on the surface of the sensor. Make sure the sensor is clean.
Sino-Inst has an oxygen level cleaning platform, perfect cleaning process and quality control process. It cleans and seals the pressure sensor and pressure transmitter for measuring oxygen and high cleanliness.
Hydrogen (H2) is an extremely flammable, colorless, and odorless gas at normal temperature and pressure. Hydrogen has strong reducing properties and is a common industrial gas. It has a large number of applications in chemical, electronic, automotive, aerospace and other industries.
Hydrogen is easy to diffuse rapidly. When the ratio of hydrogen mixed with air exceeds 4%, it will become a combustible gas. Therefore, strict process and process control are required in the process of production, storage and transportation.
Since the hydrogen atom is very small, it will diffuse through the lattice of the diaphragm (usually stainless steel), thereby penetrating into the cavity filled with silicone oil. After long-term use, the infiltrated gas can damage the sensor.
Although gold is less permeable than stainless steel, gold-plated diaphragms are an effective way to prevent hydrogen permeation.
Featured Hydrogen Pressure Sensors and Transducers
The pressure sensor dedicated to hydrogen measurement has many advantages in the pressure monitoring application of hydrogen production and purification equipment, hydrogen storage and transportation equipment.
In the process of measuring hydrogen pressure with a piezoresistive isolated pressure sensor. Since the atoms of hydrogen are very small, they will diffuse through the lattice of the diaphragm (usually stainless steel), thereby penetrating into the cavity of the sensor filled with silicone oil. Over time, the permeated gas can seriously affect the performance of the sensor. Effectively prevent the occurrence of “hydrogen embrittlement” and “hydrogen permeation”.
Measuring range: -100kPa…0kPa~35kPa…20MPa
Isolated structure, suitable for the measurement of hydrogen medium;
Pure flat membrane structure, using no dead angle full welding technology, the minimum thickness of gold plating layer is greater than 2μm;
The purity of gold plating on the surface reaches 99.8%;
The problem of hydrogen storage and transportation is an important factor affecting the cost of hydrogen. Pipeline hydrogen transportation has low cost and low energy consumption. It can realize continuous, large-scale and long-distance transportation of hydrogen energy. It is an important breakthrough direction for hydrogen storage and transportation problems.
It can be applied to hydrogen transportation scenarios such as hydrogen transportation vehicles. At the same time, it is also very suitable for pressure measurement of hydrogen storage cylinders and tank trucks and other gas and liquid hydrogen in hydrogen transportation.
Chlorine is a simple substance formed by chlorine, with the chemical formula Cl2. It is yellow-green under normal temperature and pressure. It is a highly toxic gas with a strong pungent smell. It is suffocating and has a higher density than air.
Melting point -101.00°C, boiling point -34°C. Soluble in water and alkali solution, easily soluble in organic solvents (such as carbon tetrachloride), hardly soluble in saturated saline. It is easy to compress and can be liquefied into yellow-green oily liquid chlorine.
Generally, steel, iron, copper, nickel, etc. are resistant to dry chlorine, but once chlorine gas is mixed with a small amount of water, it will generate hypochlorous acid and hydrochloric acid, which are highly corrosive to most metals.
Therefore, pressure sensors and transmitters used for chlorine pressure measurement must use special corrosion-resistant housing and diaphragm materials to ensure reliable and accurate measurement.
Featured Chlorine Pressure Sensors and Transducers
There are 2 types of chlorine pressure transmitters that are common:
Dry chlorine. Pure chlorine gas is non-corrosive. It can be said that it is economical and affordable to use ordinary pressure gauges to measure pressure.
Moist chlorine. If chlorine contains water, chlorine and water will react chemically to synthesize HCL and chloride ions. We all know that chloride ions are highly corrosive, and a special pressure transmitter must be used to measure pressure in order to resist the corrosion of chloride ions.
High Temperature Pressure Sensor with high temperature resistant pressure core or sapphire core as pressure measurement material. After high reliability amplifier circuit and precise temperature compensation. The absolute or gauge pressure of the measured medium is converted into standard electrical signals such as 4 ~ 20mA, 0 ~ 5VDC, 0 ~ 10VDC. It is also widely used in industry. Collect pressure signals at the points of some high-temperature steam and fluid pipes.
Range: -100KPa ~ 0 ~ 100MPa optional
Accuracy: ± 0.5% FS (composite error including non-linear repeatability hysteresis)
Pressure connection: M20 * 1.5 M22 * 1.5 M16 * 1.5 M11 * 1 NPT1 / 4 NTP1 / 2 NTP3 / 8 G1 / 8 G1 / 2 G1 / 4 G3 / 8,1 / 2-20UNF, etc. Other threads can be according to customer requirements design
Frequently asked questions
There are many types of pressure sensors. The following are some commonly used pressure sensors.
Ceramic piezoresistive pressure sensor: with high precision and high stability of measurement. The electrical insulation degree is greater than 2KV, the output signal is strong, and the long-term stability is good. There is no choice between micro range and large range, it is only applicable to gauge pressure measurement.
Single crystal silicon pressure sensor: wide measuring range, high precision. Wide operating temperature, good stability, excellent static pressure characteristics. It has good one-way compression characteristics.
Capacitive pressure sensor: low input force and component Ru energy. High dynamic response, small natural effects. Good environmental adaptability.
Sapphire pressure sensor: The main advantage is that it can measure high-temperature media and is not sensitive to temperature changes. The drift in time at high temperature is the lowest among these types of sensors. Sapphire can be the most The large range is up to 160MPa, while the maximum range of diffused silicon is 35MPa.
Quartz crystal pressure sensor: high frequency response pressure sensor, quick response. The digital output is stable and reliable, with strong anti-interference. Suitable for long-distance transmission, eliminating the analog The complexities of digital conversion and the errors it creates.
Sputtering thin film differential pressure sensor: the outstanding feature is that it is less affected by temperature. When the temperature changes by 100°C, the zero point drift is only 0.5%. Its temperature performance is much better than that of diffused silicon, and it can Features such as use under harsh environmental conditions.
Strain-type differential pressure sensor: The most widely used is the strain-type pressure sensor. It has extremely low price and high precision and good linear characteristics.
There are two types of resistance strain gauges: metal and semiconductor. Metal strain gauges are divided into wire type, box type, and film type. Semiconductor strain gauges have the advantages of high sensitivity and small lateral effects.
The above pressure sensors are commonly used by us. Each has its own characteristics, and the type is determined according to the needs when choosing.
For example, Below is a pressure sensor for measuring high temperature gas. The parameters are roughly:
Pressure range: 0-30psig,
300 degrees Celsius high temperature
without local display;
4-20mA signal output;
Mounting thread 7/16″-20UN-2A (Male SAE-4);
The above parameters are customized according to user requirements. Even the body length of the sensor is customized to the 160mm length requested by our customer.
A pressure sensor is a device or device that can sense pressure and convert the pressure signal into an electrical signal output according to certain rules.
Pressure sensors usually refer to component-level products with non-standard mV signal output. They are the core components of pressure transmitters.
Pressure transmitters measure the liquid level, density and pressure of liquids, gases or vapors, acting on sensitive diaphragms. In general, a pressure transmitter is mainly composed of three parts: a load cell sensor (also called a pressure sensor), a measurement circuit, and a process connection.
It can convert physical pressure parameters such as gas and liquid felt by the load cell sensor into a standard electrical signal (such as 4~20mADC, etc.). It can be used to supply secondary instruments such as indicating alarms, recorders, and regulators for measurement and indication. and process regulation.
Try to avoid direct contact between the transmitter and the corrosive or overheated measured medium.
To prevent dross from depositing in the pressure guiding tube.
The pressure guiding tube should be as short as possible.
The liquid column pressure in the pressure guiding tubes on both sides should be kept balanced.
The pressure guiding pipe should be installed in a place with small temperature gradient and temperature fluctuation.
When measuring liquid flow, the pressure tap should be opened on the side of the process pipeline to avoid sedimentation of dross. At the same time, the transmitter should be installed next to or below the pressure port so that the air bubbles can be discharged into the process pipeline.
When measuring gas flow, the pressure tap should be opened on the top or side of the process pipeline. And the transmitter should be installed next to or above the process pipeline so that the accumulated liquid can easily flow into the process pipeline.
When using a transmitter with a side relief valve in the pressure chamber, the pressure tap should be opened on the side of the process pipe. For example, when the measured medium is liquid, the relief valve of the pressure transmitter should be installed on it so as to exclude the gas infiltrated in the measured medium. When the measured medium is gas, the discharge valve of the transmitter should be installed below to discharge the accumulated liquid. The pressure chamber can be turned 180° so that the relief valve above it can be changed to the bottom.
The transmitter can be installed directly at the measuring point. It can be installed on the wall, or clamped on the pipeline with the installation plate (transmitter accessory).
Hydrogen embrittlement usually manifests as delayed fracture under stress. The phenomenon of delayed fracture occurs because the hydrogen in the part diffuses to the stress concentration part and gathers the metal defects in the stress concentration part (atomic lattice dislocation, holes, etc.).
Hydrogen diffuses into these defects, and hydrogen atoms change into hydrogen molecules to generate enormous pressure. This pressure and the residual stress inside the material and the external stress of the material form a resultant force. When this resultant force exceeds the yield strength of the material, fracture occurs.
Since hydrogen embrittlement is related to the diffusion of hydrogen atoms. Diffusion takes time, and the speed of diffusion is related to concentration gradient, temperature and material type.
A pressure transmitter is a device that converts pressure signals into electrical signals for control and remote transmission. Its core components are single crystal silicon resonant sensors and measuring capsules.
In order to reduce the pressure loss in the transmission process and prevent corrosion by the measurement medium. Generally, the metal thin-walled material with certain elasticity and anti-corrosion performance (the thickness is between 40 ~ 80um, which is slightly different for each equipment supplier) is selected to make the measuring diaphragm. Common measuring diaphragm materials include 316L stainless steel, Hastelloy, tantalum, titanium and many other types.
Since the thickness of the measuring diaphragm is less than 0.1mm, conventional pressure transmitters are prone to hydrogen embrittlement and are affected under harsh working conditions (high temperature and high pressure and high concentration of hydrogen). As a result, the toughness of the measuring diaphragm degrades and loses its elasticity, and cavity bulges or cracks appear.
Over time the hydrogen molecules can even penetrate the measuring diaphragm into the insulating silicone fluid. The presence of air bubbles increases losses during pressure transmission. It will also directly interfere with the measurement effect of the pressure transmitter, resulting in zero drift of the pressure transmitter and unstable output. Measurement errors and fluctuations in pressure measurement parameters occur. In more serious cases, the pressure transmitter may even be damaged, resulting in a safety accident.
Therefore, the selection of the measuring diaphragm of the pressure transmitter under the working condition of the coal gasification device is more important.
High pressure rotameter is suitable for flow measurement of high pressure liquid and gas.Standard type rotameter: DN15-DN50, can withstand 4.0MPa. High pressure rotameter: DN15-DN50, can withstand 25MPa. The pressure level…
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Sino-Inst is a manufacturer of Industrial Gas Pressure Sensors and Transducers. We offer more than 50 types of Gas Pressure Sensors.
Industrial Gas Pressure Sensors and Transducers are used in hydraulic and pneumatic control systems, thermoelectric units, constant pressure water supply systems, power station operation inspections, petrochemical, environmental protection, air compression, locomotive braking systems, light industry, mechanical metallurgy, building automation, and other automation And testing systems, industrial process testing and control, laboratory pressure calibration, etc.
Sino-Inst’s entire team is well trained, so we can ensure that each customer’s needs are met. If you need any help with your product requirements, whether it is Industrial Gas Pressure Sensors and Transducers, level sensors, or other equipment, please give us a call.
Request a Quote
Please enable JavaScript in your browser to submit the form
Wu Peng, born in 1980, is a highly respected and accomplished male engineer with extensive experience in the field of automation. With over 20 years of industry experience, Wu has made significant contributions to both academia and engineering projects.
Throughout his career, Wu Peng has participated in numerous national and international engineering projects. Some of his most notable projects include the development of an intelligent control system for oil refineries, the design of a cutting-edge distributed control system for petrochemical plants, and the optimization of control algorithms for natural gas pipelines.
Water Pressure Sensors refers specifically to instruments used to measure the pressure of tanks, pipes or underground water. Also called Water Pressure Transducers, or Water Pressure transmitters. Commonly used Water Pressure Sensors generally purchase diffused silicon. Convert the measured water pressure into an electronic signal. Local digital display, or analog signal or digital signal output. It is convenient for people to monitor water pressure.
Sino-Inst, as a manufacturer of Water Pressure Sensors. We provide water pipe pressure sensors, water tank pressure sensors, drinking water pressure sensors, groundwater pressure sensors, deep well pressure sensors, etc. Guarantee accurate, stable and reliable pressure measurement. 0~300psi, 1000psi, 2000psi and other customizable pressure ranges. Parameters such as materials, output signals, and pressure ports can be customized as required.
The so-called water pressure refers to the pressure of water.
It is generally believed that 0.1Mpa=10 meters of water, and the supply pressure at the end of the pipe network is 0.14Mpa. More intuitively, 0.1MPa is equivalent to a standard atmospheric pressure. The supply pressure at the end of the pipe network is 0.14Mpa, which is equivalent to a height of 14 meters from the tap to the water supply tower (pool).
Sino-Inst’s water pressure sensors are used in various industries and fields. Such as hydropower stations, hydrology, environmental monitoring, etc.
For example, they measure water depth, monitor seawater pressure in dams, calculate flow rates and control water levels.
Due to the rich experience in water pressure sensors installed in pipes, water tanks, etc., Sino-Inst can provide you with extensive professional advice in various fields.
Water pressure sensors are used to measure the static pressure of water in pipelines, storage tanks, and many other applications.
Underwater pressure sensors can also be used to measure groundwater depth in boreholes and wells, as well as agricultural irrigation, etc.
The domestic water industry will collect and send parameters such as pressure, flow, and temperature of the pipeline to the platform. The platform will process the data. Real-time control of the operation of each point. Quick repair of equipment failure, greatly reducing equipment operating costs,
Pressure sensors are also being gradually installed on fire hydrants. Prevent losses caused by fire hydrant leakage.
Water pressure transmitter is the most commonly used pressure transmitter in the field of industrial automation. Widely used in water supply equipment, building water supply system. Residential, factory buildings, water conservancy and other pressure measurement and control. Water pressure transmitters will play an inestimable role in the future automation industry.
Industrial water supply, water treatment and other industries need to pump and pressurize continuously to send water to high places or increase water pressure. Installing a water pressure sensor can effectively monitor changes in water pressure. Even realize the control of the switch.
The water pressure sensor has gradually replaced the old pressure gauge. When you choose a pressure sensor, please pay attention to learn more about the actual working conditions. Choose a more suitable pressure sensor. To ensure long-term stable operation.
The application of pressure transmitters to measure liquid levels has its own unique features. For the liquid level deviation caused by temperature changes, we can indirectly convert the density through the temperature compensation operation according to the corresponding relationship between density and temperature, and then calculate the height of the liquid column. And these are not difficult to realize in the control software. In particular, some smart transmitters have their own temperature compensation function.
After the sensor and converter of the pressure transmitter are separated and arranged in the installation form, it can also be applied to the water level measurement of deep wells, groundwater and borehole water levels, sewage pools and other containers, and has a good application prospect.
Sino-Inst offers a range of liquid level sensors for water pressure measurement applications.
More Water Pressure-Water Level-Water Flow Monitoring Solutions
Water is important in every industry. Including agriculture, industry, fire protection, etc. How to effectively, stably, and low-cost monitor water resources is very important.
Sino-Inst provides a variety of solutions, including water pressure, water level, water flow monitoring in seawater solutions such as sewage treatment, seawater desalination, etc.
Water pressure sensors, also known as water pressure transmitters and transmitters, are widely used in water pressure measurement in many fields such as water tank pressure sensors, water pipeline pressure sensors, and water container water pressure sensors.
The core of the water pressure sensor is usually made of diffused silicon. The working principle is that the pressure of the measured water pressure acts directly on the diaphragm of the sensor. Make the diaphragm produce a micro-displacement proportional to the water pressure. Change the resistance value of the sensor. and electronically detect this change. And convert and output a standard measurement signal corresponding to the pressure.
A pressure sensor is a device or device that can sense a pressure signal and convert the pressure signal into a usable output electrical signal according to a certain rule. A pressure sensor usually consists of a pressure-sensitive element and a signal processing unit. According to different test pressure types, pressure sensors can be divided into gauge pressure sensors, differential pressure sensors and absolute pressure sensors. A pressure sensor is the core part of pressure transmitter. More.
Water Pressure Sensors calibration is what you need to do before you install the pressure transmitters. Also called pressure transducer calibration, or pressure sensor calibration.
Pressure transmitters used in the process industries are very durable and reliable instruments.
Even so, they still require periodic maintenance and calibration to ensure optimal performance.
A pressure sensor is a device or device that can sense pressure and convert the pressure signal into an electrical signal output according to certain rules.
Pressure sensors usually refer to component-level products with non-standard mV signal output. They are the core components of pressure transmitters.
Pressure transmitters measure the liquid level, density and pressure of liquids, gases or vapors, acting on sensitive diaphragms. In general, a pressure transmitter is mainly composed of three parts: a load cell sensor (also called a pressure sensor), a measurement circuit, and a process connection.
It can convert physical pressure parameters such as gas and liquid felt by the load cell sensor into a standard electrical signal (such as 4~20mADC, etc.). It can be used to supply secondary instruments such as indicating alarms, recorders, and regulators for measurement and indication. and process regulation.
Water level transducers are also called Water Level Sensors, or water level transmitters. Water level transducers are used to monitor water usage and quality. The water level signal is output through 4-20mA and other signals, which is convenient for people to monitor the water level.
There are many types of water level transducers. Common ones are input type, ultrasonic, radar and so on.
Sino-Inst offer a wide range of solutions with various pressure ranges, cable lengths and output options.
For remote monitoring and recording of water level data in groundwater pumping and sludge testing, stormwater flood analysis and runoff, and surface water irrigation canals, streams and river measurements.
Water level transducer is an instrument that can convert the water level parameter of the measured point into the corresponding electric quantity signal in real time.
The working principle of the Water level transducer is that when it is put into a certain depth in the liquid to be measured. The pressure on the sensor’s front surface is converted into the liquid level height.
The calculation formula is Ρ=ρ.g.H+Po.
In the formula P is the pressure on the liquid surface of the sensor; ρ is the density of the liquid to be measured; g is the local acceleration of gravity; Po is the atmospheric pressure on the liquid surface; And H is the depth at which the sensor drops into the liquid.
By installing a water pressure sensor, we can monitor the water pressure of the pipeline or tank.
The water pressure sensor can be configured with a local display to directly display the water pressure.
Water pressure sensor can be configured with analog signal output. Such as 4-20mA. 0-10V, 0-5V, etc. Users can connect the signal to their own monitoring system. Easy to manage water pressure data.
The water pressure sensor can be configured with RS485 communication protocol. Can be connected to a computer. Transfer water pressure data to computer software.
If you cannot find an answer to your question in our Water Pressure Sensors for Measurement of Water Pressure, you can always contact us and we will be with you shortly.
Pressure Sensor Applications refer to industrial pressure transmitters that convert gas, liquid and other pressure parameters into standard electrical signals (such as 4~20mADC, etc.). For on-site or remote measurement and…
Flow Pressure Transducers are measurements of fluid pressure within a pipeline. When fluid flows through a pipe, pressure acts on the pipe wall. The medium in the pipeline can be…
Updated April 2026 — By Sino-Inst Engineering Team Wiring a pressure transducer correctly is the difference between a clean 4–20 mA signal and hours of troubleshooting. The three wiring configurations…
High Accuracy Pressure Transducers are also called high precision pressure transducers or high accuracy pressure sensors. Sino-Inst manufactures various types of High Accuracy Pressure Transducers. From the perspective of accuracy,…
Flat Pressure Sensor is a type of pressure sensor that specifically refers to the measurement diaphragm without pressure holes. Also known as a flat film pressure sensor. Flat Pressure Sensor…
What Is Resistive Pressure Transducer? Resistive pressure transducers are also called resistance pressure transducers. It is a commonly used pressure sensor. Pressure sensors are generally distinguished by principle: capacitive pressure…
What Is a Fluid Pressure Sensor? Fluid Pressure Sensors refers to sensors that can be used to measure the pressure of liquid media. Such as measuring pressure of Oil, Fuel…
What Is a Smart Pressure Transmitter? Smart pressure transmitter is also called Smart pressure sensor or Smart pressure transducer. Smart pressure transmitter is the best pressure measuring instrument. It is…
What is underwater pressure transducer? Underwater pressure transducer refers to a type of pressure sensor that can be used underwater for a long time. The degree of protection of the…
What Is Static Water Pressure? Definition of Static Water Pressure: Static Water Pressure refers to the pressure on water when it is stationary or moving in a straight line at…
High Temperature Pressure Transducer is also called High Temperature Pressure Sensor, or High Temperature Pressure Transmitter. The High Temperature Pressure Transducer is used for applications where the medium temperature exceeds…
Sino-Inst is a manufacturer of Water Pressure Sensors for Measurement of Water Pressure. We offer more than 50 types of Water Pressure Sensors.
Water Pressure Sensors pressure sensor is mainly used to measure the pressure and liquid level of the medium. In industrial production, it is widely used.
Sino-Inst Water Pressure Sensors adopt high-quality diffused silicon type, and the pressure transmitter adopts a dedicated integrated module. Fine temperature, zero point, full scale and nonlinear compensation. Realize accurate measurement and transmission of pressure changes in liquid, gas, steam and other media. Realize the ideal monitoring of changes in pressure and vacuum media in various places for enterprises, scientific research institutes and other departments.
Sino-Inst’s Water Pressure Sensors are the most commonly used sensors in industrial applications. Widely used in water conservancy and hydropower, railway transportation, intelligent building, production control, aerospace, military industry, petrochemical industry, oil well, electric power, ship, machine tool, pipeline and other industries.
Sino-Inst’s entire team is well trained, so we can ensure that each customer’s needs are met. If you need any help with your product requirements, whether it is a Water Pressure Sensor, level sensors, or other equipment, please give us a call.
Request a Quote
Please enable JavaScript in your browser to submit the form
Wu Peng, born in 1980, is a highly respected and accomplished male engineer with extensive experience in the field of automation. With over 20 years of industry experience, Wu has made significant contributions to both academia and engineering projects.
Throughout his career, Wu Peng has participated in numerous national and international engineering projects. Some of his most notable projects include the development of an intelligent control system for oil refineries, the design of a cutting-edge distributed control system for petrochemical plants, and the optimization of control algorithms for natural gas pipelines.
Pressure Sensor Applications refer to industrial pressure transmitters that convert gas, liquid and other pressure parameters into standard electrical signals (such as 4~20mADC, etc.). For on-site or remote measurement and control.
Pressure sensors are arguably the most widely used sensors in industry. Because the pressure sensor is used in addition to measuring pressure. It can also measure flow, liquid level, density, etc.
Therefore, pressure sensors are widely used in various industrial automatic control environments. Including water conservancy and hydropower, rail transit, automatic production control, aerospace, petrochemical, oil wells, electric power, ships, machine tools, pipelines, etc.
A pressure sensor is a device that can sense pressure signals and convert the pressure signals into usable output electrical signals according to certain rules. Sino-Inst, as a manufacturer of pressure sensors. We stock over 50 featured pressure sensors.
If you are using a pressure sensor for the first time, you may wonder, what is a pressure sensor? Why are there pressure sensors with various appearances on the market?
In fact, the pressure sensor is a general term. There are many types and styles of pressure sensors. However, you don’t have to worry about how to choose. You just need to inform us of your measurements and installation parameters. We will produce suitable pressure sensors according to the parameters you require. Including measuring range, temperature, display, mounting thread, output signal, etc.
The above parameters are customized according to user requirements. Even the body length of the sensor is customized to the 160mm length requested by our customer.
Pressure sensors can be classified by the range of pressure they can measure, the operating temperature, and the type of pressure. According to the classification method of pressure type, pressure sensors can be divided into the following five categories:
Absolute pressure sensor:
This type of pressure sensor measures the true pressure of the fluid, that is, the pressure relative to vacuum pressure. The absolute atmospheric pressure at sea level is 101.325kPa (14.7PSI).
Gauge pressure sensor:
This pressure sensor can measure the pressure relative to atmospheric pressure at a specific location. A tire pressure gauge is an example. When the tire pressure gauge shows a reading of 0PSI, it means that the pressure inside the tire is equal to the atmospheric pressure, which is 14.7PSI.
This type of pressure sensor is used to measure pressures less than one atmosphere. Some vacuum pressure sensors in the industry read relative to atmospheric pressure (negative readings). And some are based on their absolute pressure.
Differential pressure sensor:
This instrument is used to measure the pressure difference between two pressures. For example, measuring the pressure difference across the oil filter. Differential pressure sensors are also used to measure flow or to measure liquid levels in pressure vessels.
Sealed pressure sensor:
This instrument is similar to a gauge pressure sensor, but this instrument is specially calibrated. The pressure it measures is relative to sea level.
According to the difference in structure and principle, it can be divided into: strain type, piezoresistive, capacitive, piezoelectric, vibration frequency pressure sensors, etc. In addition, there are photoelectric, optical fiber, ultrasonic pressure sensors, etc.
Pressure sensors will also have different classifications according to different measurement principles. The following is an introduction to the working principle of some common pressure sensors.
Piezoresistive pressure sensor Resistance strain gauge is one of the main components of piezoresistive strain sensor. The working principle of the metal resistance strain gauge is the phenomenon that the resistance value of the strain resistance adsorbed on the base material changes with mechanical deformation, commonly known as the resistance strain effect.
Ceramic pressure sensors Ceramic pressure sensors are based on the piezoresistive effect. The pressure acts directly on the front surface of the ceramic diaphragm, causing slight deformation of the diaphragm. Thick film resistors are printed on the back of the ceramic diaphragm. connected as a Wheatstone bridge. Due to the piezoresistive effect of the varistor, the bridge produces a highly linear voltage signal proportional to the pressure and proportional to the excitation voltage. The standard signal is calibrated as 2.0/3.0/3.3mV/V according to different pressure ranges. Compatible with strain gauge sensors.
Diffused silicon pressure sensor The working principle of the diffused silicon pressure sensor is also based on the piezoresistive effect. Using the principle of piezoresistive effect, the pressure of the measured medium acts directly on the diaphragm of the sensor (stainless steel or ceramics). Make the diaphragm produce a micro-displacement proportional to the medium pressure. The resistance value of the sensor is changed, and the change is detected by the electronic circuit. And convert and output a standard measurement signal corresponding to this pressure.
Sapphire pressure sensors: Utilizing the working principle of strain resistance, using silicon-sapphire as the semiconductor sensitive element, it has unparalleled measurement characteristics. Therefore, semiconductor sensitive elements made of silicon-sapphire are used. Insensitive to temperature changes. Even under high temperature conditions, it has very good working characteristics. Sapphire has strong radiation resistance. In addition, the silicon-sapphire semiconductor sensitive element has no p-n drift.
Piezoelectric pressure sensor:The piezoelectric effect is the main working principle of piezoelectric sensors. Piezoelectric sensors cannot be used for static measurements. Because of the charge after the external force acts on it. Only preserved when the loop has infinite input impedance. The actual situation is not like this, so this determines that the piezoelectric sensor can only measure dynamic pressure.
Pressure sensors can measure the pressure of liquid, steam, gas and other media. Convert pressure to electrical signal output. Pressure sensors can be installed on pipelines to measure pipeline pressure. A pressure sensor can be mounted on the tank wall to measure tank pressure. So, as long as the installation space allows. The measured medium is compatible with the diaphragm material. Then the pressure sensor can measure.
Differential pressure sensors can be used to measure the difference between two pressures, usually used to measure the pressure difference between the front and back of a device or component.
Differential pressure sensors need to pay attention to some matters in use: For example:
The measured medium is not allowed to freeze. Otherwise, the sensor element isolating diaphragm will be damaged. damage to the transmitter. Temperature protection of the transmitter is required when necessary. to prevent freezing;
When measuring steam or other high temperature media. Its temperature should not exceed the limit temperature when the transmitter is used. A heat sink must be used for temperatures higher than the limit temperature used by the transmitter;
When measuring steam or other high-temperature media, heat pipes should be used. Connect the transmitter and pipe together. And use the pressure on the pipeline to transfer to the transformer;
When the measured medium is water vapor. A proper amount of water should be injected into the cooling pipe. To prevent the superheated steam from directly contacting the transmitter and damaging the sensor;
Separate differential pressure sensors are not currently used much. There are many pressure sensors that can measure both absolute pressure and differential pressure. This is very convenient for customers to use.
Liquid Level Measurement
Pressure sensors can be used to measure liquid levels using the hydrostatic principle. From open waters such as reservoir levels or sea depths to tanks and containers. This assumes that the medium is a static liquid with constant specific gravity, and that the system compensates proportionally for liquids with different densities than clear water.
For example, when measuring the oil level in a tank, a lower specific gravity means a proportionally lower pressure per meter of still water depth or level. Additionally, if the tank is not vented, or is sealed under pressure, it will be necessary to measure and compensate for the surface pressure above the liquid.
In practice, hydrostatic level measurements can use immersion probes and sealed cable assemblies to detect the head of liquid pressure above the probe inlet. Alternatively, the pressure sensor can be mounted externally on the bottom of the tank or vessel. A differential pressure sensor can be used to provide a single output for a sealed tank. The difference between two input pressures representing tank level and surface air pressure. Or the two sensors and outputs can simply be measured separately.
In addition, differential pressure sensors can also be used to measure gas flow, liquid level, etc.
A method of measuring gas flow through the difference between flow tube pressure and atmospheric pressure. Find the flow tube static pressure. The square root of static pressure is proportional to flow, giving flow. The liquid level measurement method measures the pressure difference between the high and low liquid levels. Then calculate the height of the liquid surface according to the density of the liquid.
The flow measurement is realized by differential pressure measurement. That is to say, the measurement is carried out by using the working principle that there is a certain relationship between the pressure difference and the flow rate generated when the medium fluid flows through the throttling device.
With the continuous development of flow sensors, more and more types of flow sensors are gradually coming out. They each have their own advantages and disadvantages. When users choose flow sensors, they should choose the appropriate sensor according to their own needs. .
The differential pressure flow sensor is an instrument that calculates the flow rate based on the differential pressure generated by the flow detection device installed in the pipeline, the known fluid conditions and the geometric dimensions of the detection and pipeline.
When the fluid filled with the pipeline flows through the throttling piece in the pipeline, the flow velocity will form a local contraction at the throttling piece. Therefore, the flow velocity increases and the static pressure decreases. Therefore, a pressure difference is generated before and after the throttling piece. The greater the flow rate, the greater the pressure difference. In this way, the flow rate can be measured according to the pressure difference.
Differential pressure online density meter (also known as online density transmitter) is a device for continuous online measurement of liquid concentration and density. It can be directly used in industrial production processes. The differential pressure sensor is one of the core components.
The intelligent online density meter adopts the principle of differential pressure density meter, which can calculate the density value according to the differential pressure value of the medium at a certain vertical distance, and automatically perform temperature compensation. It has high precision and good reliability. It is easy to install and use.
The two-wire density transmitter is mainly used for industrial process control. The online density meter generates a corresponding 4-20mA signal according to the concentration and density. It can be remotely calibrated and monitored through digital communication.
Pressure Sensor Applications in Various Industries
Pressure Sensor in Petrochemical Industry Applications
Pressure sensor is one of the most commonly used measuring devices in petrochemical automatic control.
In some large-scale chemical projects, almost all pressure sensors are applied to differential pressure, differential pressure, high temperature, absolute pressure, gauge pressure, high pressure, low temperature, and remote flange pressure sensors of various materials and special processing.
It is not difficult to see that the petrochemical industry has a relatively concentrated demand for pressure sensors in terms of reliability, stability and high precision.
However, reliability and many additional requirements (such as range ratio, bus type, etc.) depend on the design structure, process and material level of the transmitter.
The stability and measurement accuracy of the pressure sensor can ensure the stability and high precision of the pressure transmitter. The measurement accuracy and response speed of the pressure sensor correspond to the measurement accuracy of the pressure transmitter. The temperature and static pressure characteristics and long-term stability of the pressure sensor correspond to the stability of the pressure transmitter.
The petrochemical industry’s demand for pressure sensors is mainly reflected in measurement accuracy, response speed, temperature resistance, static pressure characteristics and long-term stability.
The current miniature pressure sensor is mainly a new type of pressure sensor manufactured by using semiconductor materials and MEMS technology. It has the advantages of high precision, high sensitivity, small size, corrosion resistance, low cost, and good dynamic characteristics.
Pure single crystal silicon material is prone to fatigue, and micro pressure sensors made of this material have good long-term stability. At the same time, the miniature pressure sensor increases the temperature compensation accuracy, which greatly improves the temperature characteristics and measurement accuracy of the sensor. If two miniature pressure sensors are integrated, static pressure compensation can be implemented to improve the static pressure characteristics of the pressure sensor.
At present, micro pressure sensors have many advantages that traditional pressure sensors do not have. It is very suitable for the demand of pressure sensor in petrochemical industry.
Pressure Sensor in City Power Gas Industry Applications
Water, electricity, and gas are closely related to people’s lives. Its stable and safe transportation is very important. In order to ensure the normal use of this important urban living resource, a sufficiently stable and accurate instrument is required to perform real-time numerical measurement of related equipment. .For maintenance personnel to monitor equipment operation. Pressure transmitters meet this requirement.
For example, pressure transmitters can monitor the pressure of gas pipelines in real time. Once a leak occurs, the pipeline pressure will drop. Such as exceeding the preset safe pressure value. An alarm will be triggered and an abnormal location will be prompted.
Through the intelligent gas pipeline network, subsystems such as automatic control of fusion stations, video surveillance, pressure regulator pressure monitoring, leakage monitoring in confined spaces, and remote transmission of industrial user data monitoring can be connected. Realize 24-hour all-round uninterrupted monitoring. Transform “unmeasurable risk” into “preventable and controllable”.
Pressure Sensor in Paper Industry Applications
Pressure Sensor in Paper Industry Applications
Pulp and paper, used where resistance to chemical liquids, corrosive liquids, etc. is required.
In the material preparation section of the papermaking industry, the pressure transmitter is mainly involved in the flow measurement of the pulp, water and acid or alkali during the pulping process. Therefore, it is necessary to choose carefully when selecting the electrode material.
In the screening and bleaching section, the lining material of the pressure transmitter should preferably be PFA or PTEE.
Some of the raw materials and various chemical reagents used in the paper industry are corrosive. The measuring equipment used in this industry must first have strong corrosion resistance, and can accurately measure the relevant parameters of the liquid level such as pulp with complex components. Pressure change The feeder also has a place in the paper industry because of its anti-corrosion design.
Pressure Sensor in Steel-Metallurgical Industry Applications
When it comes to the steel industry, many people’s first impression is high temperature and high pressure. Thousands of degrees of high temperature can melt many materials. Huge pressure is also unbearable for many measuring instruments. Therefore, steel has high requirements for the use of measuring tools.
Pressure sensors with high temperature and high pressure capabilities are accepted by the iron and steel metallurgy industry.
Pressure Sensor in Water Supply-Wastewater Treatment Industry Applications
In the water and wastewater industry, the reliability of instrumentation is critical. The use of pressure transmitters can provide an important means for system protection and quality control.
Even in harsh or aggressive media in applications such as desalination plants or sludge treatment. The pressure transmitter is still able to operate stably. At the same time, the excellent anti-vibration performance enables it to be installed on the pump. This advantage makes pressure transmitters ubiquitous in the water treatment industry.
Also in water conservancy and hydropower, pressure transmitters also play a pivotal role. Because the level of automation is one of the important indicators to measure the modernization level of hydropower plants.
If the computer monitoring system of a hydropower plant is compared to the brain of an automation system. Then the pressure, temperature, flow, liquid level and other sensors are the eyes and ears of the computer monitoring system to complete the process monitoring and control.
Pressure Sensor in Machinery, Shipbuilding Industry Applications
It is used in places where stable measurement is required under strict control and high precision conditions. In general, pressure transmitters are mainly used to measure the pressure and liquid level of the medium. In the production of our machinery and shipbuilding industries, pressure sensors are widely used.
Pressure Sensor in Medical Application
With the development of the medical equipment market, higher requirements are put forward for the use of pressure sensors in the medical industry. Such as accuracy, reliability, stability, volume, etc. need to be improved. Pressure sensors have good applications in minimally invasive catheter ablation and temperature sensor measurement.
Pressure Sensor in Hydraulic System Applications
The pressure sensor is mainly used in the hydraulic system to complete the closed-loop control of the force. When the control spool moves suddenly, a peak pressure several times the system working pressure will be formed in a very short time.
In typical mobile machinery and industrial hydraulics, if such extreme conditions are not considered in the design, any pressure sensor will be destroyed very quickly. Shock-resistant pressure sensors are required.
There are two main methods for the pressure sensor to achieve impact resistance, one is to change the strain gauge chip, and the other is to connect an external coil. Generally, the first method is used in the hydraulic system, mainly because of the convenience of installation. Another reason is that the pressure sensor is subjected to constant pressure pulsations from the hydraulic pump.
Pressure Sensor in Safety Control System Applications
Pressure sensors are often used in safety control systems, mainly for the safety management system of the air compressor itself. There are many sensor applications in the field of safety control, and pressure sensors are a very common sensor. It is not surprising that they are used in safety control systems.
The application in the field of safety control is generally considered from the aspect of performance, from the consideration of price, and from the consideration of the safety and convenience of actual operation. It has been proved that the effect of choosing a pressure sensor is very good.
The pressure sensor uses the processing technology of mechanical equipment to install some components and signal conditioners on a small chip. So small size is also one of its advantages. In addition, cheap price is also another major advantage of it.
To a certain extent, it can improve the accuracy of system testing. In the safety control system, the pressure brought by the compressor is controlled to a certain extent by installing a pressure sensor in the pipeline equipment at the gas outlet. This is a certain protection measure and a very effective control system.
When the compressor starts normally, if the pressure value does not reach the upper limit, then the controller will open the air inlet to make the equipment reach the maximum power through adjustment.
Pressure Sensor in Injection Mold Applications
Pressure sensors play an important role in injection molds. The pressure sensor can be installed in the nozzle of the injection molding machine, the hot runner system, the cold runner system and the cavity of the mold. It can measure the flow of plastic from the nozzle of the injection molding machine to the Plastic pressure somewhere between cavities.
Pressure Sensor in Monitoring Mine Pressure Applications
There are many kinds of pressure sensors, and based on the special environment of mine pressure monitoring, mine pressure sensors mainly include: vibrating wire pressure sensors, semiconductor piezoresistive pressure sensors, metal strain gauge pressure sensors, differential transformer pressure sensors, etc. More about: Diaphragm pressure gauge working principle.
These sensors are widely used in the mining industry. Which sensor to use depends on the specific mining environment.
Pressure Sensor in compressors, air-conditioning refrigeration equipment Applications
Pressure sensors are often used in air compressors and air-conditioning and refrigeration equipment. These sensors are small in size and easy to install. The pressure guide port generally adopts a special valve needle design.
Flow Pressure Transducers are measurements of fluid pressure within a pipeline. When fluid flows through a pipe, pressure acts on the pipe wall. The medium in the pipeline can be…
Updated April 2026 — By Sino-Inst Engineering Team Wiring a pressure transducer correctly is the difference between a clean 4–20 mA signal and hours of troubleshooting. The three wiring configurations…
High Accuracy Pressure Transducers are also called high precision pressure transducers or high accuracy pressure sensors. Sino-Inst manufactures various types of High Accuracy Pressure Transducers. From the perspective of accuracy,…
Flat Pressure Sensor is a type of pressure sensor that specifically refers to the measurement diaphragm without pressure holes. Also known as a flat film pressure sensor. Flat Pressure Sensor…
What Is a Fluid Pressure Sensor? Fluid Pressure Sensors refers to sensors that can be used to measure the pressure of liquid media. Such as measuring pressure of Oil, Fuel…
What Is Resistive Pressure Transducer? Resistive pressure transducers are also called resistance pressure transducers. It is a commonly used pressure sensor. Pressure sensors are generally distinguished by principle: capacitive pressure…
What Is a Smart Pressure Transmitter? Smart pressure transmitter is also called Smart pressure sensor or Smart pressure transducer. Smart pressure transmitter is the best pressure measuring instrument. It is…
What is underwater pressure transducer? Underwater pressure transducer refers to a type of pressure sensor that can be used underwater for a long time. The degree of protection of the…
High Temperature Pressure Transducer is also called High Temperature Pressure Sensor, or High Temperature Pressure Transmitter. The High Temperature Pressure Transducer is used for applications where the medium temperature exceeds…
Sino-Inst is a manufacturer of pressure sensors. We offer more than 50 types of pressure sensors. Main products include compact pressure transmitters, industrial pressure transmitters, differential pressure transmitters, single crystal silicon pressure transmitters, diffused silicon pressure transmitters , Diaphragm pressure transmitter, high temperature pressure transmitter, explosion-proof pressure transmitter, pressure transmitter, custom pressure transmitter, with remote pressure transmitter, 316 diaphragm pressure transmitter.
The pressure sensor is mainly used to measure the pressure and liquid level of the medium. In industrial production, it is widely used. Sino-Inst pressure transmitter adopts high-quality diffused silicon type, and the pressure transmitter adopts a dedicated integrated module. Fine temperature, zero point, full scale and nonlinear compensation. Realize accurate measurement and transmission of pressure changes in liquid, gas, steam and other media. Realize the ideal monitoring of changes in pressure and vacuum media in various places for enterprises, scientific research institutes and other departments.
Sino-Inst’s pressure sensors are the most commonly used sensors in industrial applications. Widely used in water conservancy and hydropower, railway transportation, intelligent building, production control, aerospace, military industry, petrochemical industry, oil well, electric power, ship, machine tool, pipeline and other industries.
Sino-Inst’s entire team is well trained, so we can ensure that each customer’s needs are met. If you need any help with your product requirements, whether it is a pressure sensor, level sensors, or other equipment, please give us a call.
Request a Quote
Please enable JavaScript in your browser to submit the form
Wu Peng, born in 1980, is a highly respected and accomplished male engineer with extensive experience in the field of automation. With over 20 years of industry experience, Wu has made significant contributions to both academia and engineering projects.
Throughout his career, Wu Peng has participated in numerous national and international engineering projects. Some of his most notable projects include the development of an intelligent control system for oil refineries, the design of a cutting-edge distributed control system for petrochemical plants, and the optimization of control algorithms for natural gas pipelines.
Flow Pressure Transducers are measurements of fluid pressure within a pipeline. When fluid flows through a pipe, pressure acts on the pipe wall. The medium in the pipeline can be liquid or gas. Measure the pressure of the fluid, on the one hand, you can understand the pressure in the pipeline. On the other hand, pipeline flow can be monitored through the relationship between pipe diameter-pressure-flow.
Differential pressure sensors have been widely used to measure the flow of incompressible liquids. A very common method is to measure the pressure drop across the orifice in the pipe and calculate the flow.
An orifice plate is simply a plate that fits in a pipe (usually between flanges) with a hole of known size in its center. As the fluid flows through the orifice, a pressure drop develops across the orifice plate from the upstream side to the downstream side. This pressure drop is proportional to flow, and the sensor signal can be used to calculate flow in engineering units.
The upstream side of the orifice will have higher pressure and will be connected to the + port of the pressure sensor through a three-valve manifold. The downstream side of the orifice is similarly connected to the -port of the pressure sensor. The three-valve manifold is used to protect the pressure sensor from overpressure when the pressure sensor is installed into the work pipeline.
Calculations to determine flow from pressure drop are derived from fairly simple physical equations. However, there are many variables, each with its own engineering unit. These include: hole geometry, pipe size, fluid viscosity and fluid density. Given the number of terms and the conversion factors involved in each variable, the calculation can be quite involved.
Fortunately, there are many online calculators that allow you to simply enter variables in any engineering units that are convenient for you, and then calculate the flow rate for any given pressure drop across the orifice.
Fluid Pressure Transducers are mainly used in: construction machinery, hydraulic and pneumatic systems, petrochemicals, energy and water treatment, water conservancy and hydropower, compressors and other fields:
How to install the pressure sensor when measuring the flow pipeline?
When detecting the gas and fluid pressure in the pipeline, the pressure guiding pipe is connected with a vertical tee before entering the pressure sensor. The sampling gas enters from the upper part of the tee. The lower part of the tee is connected to a water collecting irrigation, and the horizontal interface of the tee enters the pressure sensor .
The pressure sensor is installed horizontally. The sampling pressure pipe is connected to the upper part of the pressure sensor detection diaphragm. The lower part of the detection diaphragm has its own discharge bolt.
When there is liquid entering the pressure guiding pipe, a large part will be collected in the water collecting irrigation. A small amount of liquid entering the pressure sensor detection diaphragm can be discharged by the discharge bolt of the pressure sensor.
When measuring fluid pressure, the pressure of the main fluid is taken as the measurement object. Therefore, when the pressure sensor measures the gas pressure in the pipeline, in order to prevent the liquid in it from entering the sampling pressure pipe. The sampling point is 45° above the horizontal plane of the center of the pipeline.
When measuring the liquid pressure of the pipeline, in order to prevent the gas in it from entering the sampling pressure guiding tube, the sampling point is 45° below the horizontal plane of the center of the pipeline. Read more about: Shop 101: Key Factors In Selecting A Pipe Flow Meter
Even so, it is inevitable that different phases of fluid will enter the sampling impulse pipe. There are different requirements for the installation and configuration of the pressure sensor impulse pipe.
The water collecting tank or gas collecting tank installed on the pressure guiding pipe is equipped with an inlet valve and a discharge valve. During normal testing, the inlet valve is opened and the discharge valve is closed. When it is necessary to discharge, first close the inlet valve, and then open the discharge valve. . This discharge method will always have a bit of out-of-phase fluid remaining in the water or gas header, but it will not affect the pressure sensor detection accuracy.
Fluids include both gaseous fluids and liquid fluids. The density and pressure of gaseous fluids are lower than that of liquid fluids. So in pipeline fluids, the gaseous fluid is always above the liquid fluid. This is the basic characteristic of vapor-liquid two-phase fluid.
There are many types of pressure sensors. Such as resistance strain gauge pressure sensors, semiconductor strain gauge pressure sensors, piezoresistive pressure sensors, inductive pressure sensors, capacitive pressure sensors, resonant pressure sensors, etc.
Flow is an important parameter in industrial production and life. The amount of fluid flowing through a section of a pipe per unit time is called instantaneous flow. Instantaneous flow is divided into volume flow and mass flow. A flow sensor is a sensor that measures the flow of a fluid. Flow sensor is an important instrument in measurement technology, it is widely used in industrial process control, life science and technology, commercial application, military and other fields. In recent years, with the development of science and technology and the development of human needs, flow sensors are also constantly developing.
What is an insertion flow meter? Insertion flowmeter is a type of flowmeter in which the measuring probe is inserted into the pipe to measure the flow. This is a…
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Updated April 2026 — By Sino-Inst Engineering Team Wiring a pressure transducer correctly is the difference between a clean 4–20 mA signal and hours of troubleshooting. The three wiring configurations…
High Accuracy Pressure Transducers are also called high precision pressure transducers or high accuracy pressure sensors. Sino-Inst manufactures various types of High Accuracy Pressure Transducers. From the perspective of accuracy,…
Flat Pressure Sensor is a type of pressure sensor that specifically refers to the measurement diaphragm without pressure holes. Also known as a flat film pressure sensor. Flat Pressure Sensor…
What is non contact flow meter? Non Contact Flow Meters refers to flow meters that can achieve flow measurement without contacting the fluid medium. No need to destroy the pipeline…
What Is a Fluid Pressure Sensor? Fluid Pressure Sensors refers to sensors that can be used to measure the pressure of liquid media. Such as measuring pressure of Oil, Fuel…
Updated: April 14, 2026 A rotameter is a flow meter, not a separate instrument. It’s one specific type called a variable area flow meter. The real question most engineers ask…
What is mechanical oil flow meter? Mechanical oil flow meter refers to a flowmeter that can detect the volume flow of oil inline. Most importantly, this type of flowmeter is…
What Is a Smart Pressure Transmitter? Smart pressure transmitter is also called Smart pressure sensor or Smart pressure transducer. Smart pressure transmitter is the best pressure measuring instrument. It is…
In the new era, petrochemical enterprises are facing unprecedented challenges. How to improve the production efficiency of the petroleum industry and improve the product quality is an important problem that…
High Temperature Pressure Transducer is also called High Temperature Pressure Sensor, or High Temperature Pressure Transmitter. The High Temperature Pressure Transducer is used for applications where the medium temperature exceeds…
What is Clamp on Water Flow Meter? Clamp on Water Flow Meter is also known as the clamp-on ultrasonic flowmeter. Using an ultrasonic flowmeter to measure water flow rate is…
Flow Meter for Slurry Application Slurry is a product of domestic sewage and industrial wastewater treatment. Slurry consists of solid impurities, a slurry of suspended substances. The main characteristic of…
Measuring Steam Flow Measuring Steam Flow is a difficult task. But again, it’s a very important thing. Steam flow measurement is difficult, the main reason is determined by the characteristics…
Fuel Flow Meter for Boat refers to a flow meter dedicated to measuring marine fuel. There are many types of marine fuel oil. Mainly include light diesel, heavy diesel, fuel…
Digital Fuel Flow Meter is a flow meter dedicated to measuring fuel, diesel, gasoline, and petroleum. Digital Fuel Flow Meter generally has a digital display or signal output. Such as…
Sino-Inst is Manufacturer of Flow Pressure Transducers for Fluid Pipelines. For High Viscosity Fluids-Chemical Coatings – Paints – Slurry – Asphalt – Crude Oil. We supply more than 20 kinds of Flow Pressure Transducers.
Flow Pressure Transducers are mainly used for highly viscous media. It can measure even liquids such as water, seawater, oil, and slurry.
Sino-Inst’s Flow Pressure Transducers, made in China, Having good Quality, With better price. Our pressure measurement instruments are widely used in China, India, Pakistan, the US, and other countries.
The entire team at Sino-Inst’s has received excellent training, so we can ensure that every client’s needs are met. For assistance with your product requirements, whether it’s a Flow Pressure Transducer, level sensor, or other device, give us a call.
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Wu Peng, born in 1980, is a highly respected and accomplished male engineer with extensive experience in the field of automation. With over 20 years of industry experience, Wu has made significant contributions to both academia and engineering projects.
Throughout his career, Wu Peng has participated in numerous national and international engineering projects. Some of his most notable projects include the development of an intelligent control system for oil refineries, the design of a cutting-edge distributed control system for petrochemical plants, and the optimization of control algorithms for natural gas pipelines.
High Accuracy Pressure Transducers are also called high precision pressure transducers or high accuracy pressure sensors. Sino-Inst manufactures various types of High Accuracy Pressure Transducers.
From the perspective of accuracy, the accuracy of conventional pressure transmitters is 0.5%. Therefore, pressure transmitters can be divided into high-precision pressure transmitters (0.1% or 0.2% or 0.075%) and general pressure transmitters ( 0.5%).
High Accuracy Pressure Transducers support mV/V, V, mA and digital outputs. Ideal for applications requiring very high precision measurements such as oil, gas and geothermal energy exploration.
When ordering a pressure transmitter, you can often be asked what accuracy pressure transmitter you need. Then our sales engineer will tell you that we have 0.5% accuracy and 0.1% accuracy. Even higher precision ones can be customized.
Also, different accuracy may affect the price of the pressure transmitter. So what is the accuracy of the pressure transmitter? Do we need to blindly pursue higher-precision pressure transmitters?
The accuracy of the pressure transmitter is the same as that of all measurement and display instruments, and it is an indicator of the reliability of the measured value of the instrument.
The instrument has a maximum allowable error (deviation), and the probability of more than 98% of the results obtained from N times of measurements on the same measured value does not exceed this range.
Maximum allowable error / measuring range * % = meter accuracy
For a pressure transmitter with an accuracy of class 0.1,
A pressure transmitter in the general sense is mainly composed of a load cell sensor (also called a pressure sensor), a measurement circuit and a process connection. It can convert physical pressure parameters such as gas and liquid sensed by the load cell sensor into standard electrical signals (such as 4~20mADC, etc.) to supply secondary instruments such as indicating alarms, recorders, and regulators for measurement and indication. and process regulation.
The pressure transmitter is an instrument that accepts pressure variables and converts the pressure changes into standard output signals in a certain proportion after sensing and conversion. The output signal of the transmitter is transmitted to the central control room for pressure indication, recording or control.
Usually, when considering the overall accuracy of the pressure transmitter, the factors that affect the accuracy of the pressure transmitter generally need to be considered.
According to the experience of Sino-Inst, we believe that everyone should choose the tolerance of the pressure transmitter according to the requirements of the industrial process. Instead of selecting according to the pressure transmitter indicators installed in the field.
Factors affecting the overall accuracy of pressure transmitters
In the pressure transmitter manual or website, there is usually a separate and limited description of the accuracy. It might be called “reference precision” or something similar. But this only includes some of the factors that affect accuracy, not all. For example it only includes nonlinearity, hysteresis and repeatability.
This “best accuracy” does not take into account all factors that affect accuracy in practice (installation location, ambient temperature, etc.).
Therefore, do not think that the pressure transmitter is installed in an industrial process. This precision can be achieved in practical applications.
For a high-accuracy pressure transmitter, the “best accuracy” might be 0.04% or 0.025% of the pressure span.
The best (reference) accuracy is generally only for a few pressure ranges, not the full pressure range. And, it may vary with different pressure types. That is, the absolute range is not necessarily equal to the full range.
Accuracy specifications may be doubled or tripled for different ranges.
So make sure you know the accuracy for the pressure range/model you are using.
The HART intelligent pressure transmitter can rescale its accuracy range in any ratio. Pressure transmitters can typically be scaled by 100:1 or higher adjustment specific gravity. Accuracy specifications typically give either full scale or a limited turndown ratio.
If the HART smart pressure transmitter is re-ranged to less than full scale, the accuracy specification will usually be degraded.
Therefore, if you re-range the pressure transmitter to less than the maximum range, you need to confirm how much accuracy error is incurred.
Most pressure transmitters in use are subject to changing environmental conditions. Likewise, the temperature of the pressure medium may vary considerably during use.
Like most measuring devices, pressure transmitters usually have some kind of temperature coefficient, a factor that affects accuracy depending on the ambient temperature. This temperature-dependent property seems to be commonly specified in an incomprehensible expression.
But try to understand this, and if you can’t figure this out, ask the pressure transmitter manufacturer.
It may vary from 0.01% to 0.5% of span for different pressure transmitters.
The worst-case pressure model indicated temperature effects may exceed 1% of range.
You should take this into account if the temperature varies widely during use.
The differential pressure transmitter can be used under the condition of pipeline static pressure. This means that both inputs have a certain pressure, and the differential pressure transmitter measures the difference between the two inputs. It is different from a transmitter that measures pressure under atmospheric conditions or a transmitter that measures absolute pressure under complete vacuum conditions.
An ideal differential pressure transmitter can only measure the difference between the inputs. But static line pressure actually has some effect on the output. If both inputs are at atmospheric pressure, the differential pressure is naturally zero.
Likewise, if the same pressure (say 50 bar/psi) is applied to both inputs, the differential pressure is still zero.
In fact, static pressure will have a certain effect on the output of the transmitter.
Static pressure effects typically vary from 0.025% to 0.4% of span, depending on the differential pressure transmitter model.
Static pressure generally mainly changes the zero position of the differential pressure transmitter without significantly affecting the measurement full scale. Therefore, in the calibration process, after applying the same pressure (high pressure or low pressure) to both input terminals, observe the change value of the zero position of the differential pressure transmitter to verify this effect.
Line pressure may also have an effect on the measuring range of the differential pressure transmitter, which increases the difficulty of operation and calibration. It needs to be calibrated using a differential pressure standard.
All measuring equipment will gradually lose accuracy over time. Some increase, some decrease. The same goes for pressure transmitters. Some pressure transmitters have a one-year stability guarantee, and some are even 5 or 10 years or more.
For example, a pressure transmitter with a reference accuracy of 0.04% of span can have an annual stability of 0.2% of span. For some other models, 0.2% span stability can be effective for 5 or even 10 years.
Depending on how often the pressure transmitter is recalibrated, you should consider long-term stability effects, as the pressure transmitter may drift significantly before the next recalibration (and possibly trim).
The installation location often affects the accuracy of the pressure transmitter. Most pressure transmitters will specify a mounting location.
Changing the installation orientation will generally cause the zero position of the pressure transmitter to change, but will not affect the accuracy of the full scale measurement. In fact, the mounting orientation of the pressure transmitter does not change during normal use. The location of the pressure transmitter should be considered when the pressure transmitter is calibrated in the workshop and installed in an industrial process, or when the pressure transmitter is removed from an industrial process for recalibration.
Of course, if the transmitter is a remote differential pressure type, the installation position of the capillary will have a great influence on the zero value. Again, this isn’t something that doesn’t change during normal use. Calibration may be affected if the remote differential pressure transmitter is removed from the installation location.
Many pressure transmitters specify vibration effects. Of course, this only needs to be considered when the pressure transmitter is installed in a vibrating location. The effect of vibration on accuracy is usually small, eg “less than 0.1% of span”.
The two-wire pressure transmitter will not work when the external power supply is not connected. The common power supply is 24VDC power supply. Pressure transmitters can usually operate over a wide supply voltage range, even down to 10 VDC. However, when the supply voltage changes during operation, it has little effect on the accuracy of the pressure transmitter.
For example, it can be specified as “every 1V of power supply voltage will produce less than 0.01% change of measurement range”. In fact, when the power supply can be used normally, there is generally no problem.
The index parameters of the overall accuracy of some pressure transmitters contain several common factors that affect the accuracy. These include the “reference accuracy” mentioned above and the effect of ambient temperature and static/line pressure. This overall accuracy is easier to grasp because it is closer to what a pressure transmitter can achieve.
For example, an “overall accuracy” specification might be 0.14% of span, while the reference value is 0.04%. Therefore, once temperature and line pressure effects are included, the reference accuracy is multiplied by 3-4.
Another example is that there is a 0.075% range reference accuracy, when the temperature effect is considered, the accuracy is reduced to 0.2% of the range, and when the static pressure effect is further considered, the accuracy is reduced to 0.3% of the range.
If the index parameters of the overall accuracy of the pressure transmitter are clear. This will help you gain an in-depth understanding of the type of accuracy that can be achieved in practice. Even these overall accuracies are often missing some of the factors listed in this paper.
When using a pressure transmitter to measure pressure, there is a risk that the membrane of the transmitter will be contaminated by the pressure medium or some dirt. Such contamination can seriously affect the accuracy of the pressure transmitter.
Of course, this is not something that is explicitly stated. But it can also be considered a big risk in normal use, especially if you decide to recalibrate with a long period of time (eg, years). Therefore, in addition to the long-term drift indicator parameters of the pressure transmitter, this needs to be considered in the risk analysis.
If the pressure transmitter gets very dirty and starts to experience significant measurement errors, you will generally find this in the measurement results.
However, if it is only a small error, it is difficult to notice it in normal use.
Many friends have some misunderstandings about this issue, and feel that 4-20mAdc is more troublesome to calculate. So why use 4-20mAdc?
The field two-wire pressure transmitter needs power supply. First, it is necessary to ensure that there is still a certain current in the case of zero position. Then in the design, we found that the minimum starting current of the transmitter is 3.5mA, which means that the transmitter can still work under 3.5mA.
Then if it is 0mA, then there is no power supply and it cannot work.
So use 4mA as the zero position, if it starts at 0mA, the meter will not work. If there is a disconnection in the field, there is no way to tell if it is a problem with the meter or the power supply. Therefore, the international general standard starts from 4mA.
The second question, why is it 20mA? Why not 30mA? Why not 100mA?
It stands to reason that the bigger the better, the higher the resolution, but it is not.
Through the observation of the gas explosion point, it is found that the spark generated when the 20mA is switched on and off will not cause the gas explosion. 20mA is a critical value, so ≤20mA is safe. If >20mA, there will be an explosion problem, so 4-20mA is a better value.
Then there are also some occasions where 0-10mA is used, which is generally not used in the process industry. It may be used in the discrete industry. There are also some occasions where 0.5v-4.5v or 0-5v are used in the discrete industry. Then for the process industry, it is mainly 4-20mA.
Sino-Inst is a pressure transmitter manufacturer, the main products include intelligent pressure transmitter, digital pressure transmitter, high temperature pressure transmitter, sanitary pressure transmitter, compact pressure transmitter, liquid level pressure transmitter transmitter, differential pressure transmitter, etc., the product series is complete, high precision, welcome to inquire!
In fact, we believe that there is no best pressure sensor, only the most suitable pressure sensor. There are thousands of pressure sensor brands and models on the market. Each type of pressure sensor has its own advantages. Therefore, only a pressure sensor that satisfies specific measurement conditions is a suitable pressure sensor, that is, the best pressure sensor.
As long as we choose a pressure sensor, remember a few words: type, range, overload, medium, temperature, accuracy, signal, process connection. A suitable pressure sensor can be selected.
The high pressure sensor mainly measures pressure, that is, converts the measured pressure value into a current or voltage signal, and the converted current or voltage signal can be processed by the circuit and output to meet the standard.
Simply put, the function of the high pressure sensor is to feel the measured value within a specified range and convert it into a signal according to a certain law.
With the development of technology, high pressure sensor has the most primitive mechanical structure into the current semiconductor material structure. So its volume and weight are greatly improved. No longer as bulky and large as before. In addition, the sensitivity and accuracy are also greatly improved, and the installation and debugging are extremely convenient.
The two most commonly used types of pressure sensors are diffused silicon and capacitive.
Pressure transmitters can be categorized into four main types:
Gauge Pressure Transmitter.
Absolute Transmitters.
Differential-Pressure Transmitter.
Multivariable Pressure Transmitters.
High pressure transducer is used to measure high pressure up to 1500Mpa. Also called ultra high pressure transducer.
High pressure transducer adopts ultra high pressure design. Suitable for high pressure applications up to 15000bar. SI-702S series ultra high pressure pressure transducer can provide reliable ultra-high pressure measurement. Ultra high pressure transmitter adopts rare metal alloy material. After special process treatment, integrated design. All stainless steel welding package. Laser resistance temperature compensation. With high performance digital processing circuit. The factory has undergone high and low temperature aging and long-term fatigue tests. Good long-term stability. Ultra-long working life. Maintain safe and stable operation in the ultra-high pressure range.
The pressure sensor converts non-electrical physical quantities such as gravity, pressure, liquid level, material characteristics, etc. into electrical signals or directly sends physical quantities such as pressure, liquid level, etc. to the pressure transmitter.
The pressure transmitter is to amplify the weak electrical signal collected by the pressure sensor in order to transmit or start the control element. Or a signal source that converts the non-electrical input from the sensor into an electrical signal and amplifies it for remote measurement and control. The analog quantity can also be converted into a digital quantity as required.
The pressure sensor and the pressure transmitter together constitute an automatically controlled monitoring signal source. Different physical quantities require different pressure sensors and corresponding pressure transmitters.
Flat Pressure Sensor is a type of pressure sensor that specifically refers to the measurement diaphragm without pressure holes. Also known as a flat film pressure sensor. Flat Pressure Sensor…
What Is Resistive Pressure Transducer? Resistive pressure transducers are also called resistance pressure transducers. It is a commonly used pressure sensor. Pressure sensors are generally distinguished by principle: capacitive pressure…
What Is a Fluid Pressure Sensor? Fluid Pressure Sensors refers to sensors that can be used to measure the pressure of liquid media. Such as measuring pressure of Oil, Fuel…
What is underwater pressure transducer? Underwater pressure transducer refers to a type of pressure sensor that can be used underwater for a long time. The degree of protection of the…
What Is a Smart Pressure Transmitter? Smart pressure transmitter is also called Smart pressure sensor or Smart pressure transducer. Smart pressure transmitter is the best pressure measuring instrument. It is…
High Temperature Pressure Transducer is also called High Temperature Pressure Sensor, or High Temperature Pressure Transmitter. The High Temperature Pressure Transducer is used for applications where the medium temperature exceeds…
What Is Static Water Pressure? Definition of Static Water Pressure: Static Water Pressure refers to the pressure on water when it is stationary or moving in a straight line at…
What is a ceramic pressure sensor? Ceramic pressure sensors are sensor diaphragms made of ceramic alumina (Al2O3). Ceramic is a material with high elasticity, corrosion resistance, wear resistance, impact, and…
The Hydrostatic Pressure Transmitter measures the hydrostatic pressure exerted by a hydrostatic head. Use these hydrostatic pressure transmitters to measure the liquid level in storage tanks, processing vessels, collection tanks,…
Intrinsically safe type is an explosion-proof type of electrical equipment. When purchasing electrical equipment, do you often hear about intrinsic safety? For example, when ordering pressure transmitters or flow meters…
Updated: April 21, 2026 | Sino-Inst Engineering Team The cheapest way to convert a 4-20 mA loop signal into a voltage for a PLC or recorder analog input is a…
What does SCADA stand for? SCADA is the abbreviation of Supervisory Control And Data Acquisition. Namely data acquisition and monitoring control system. SCADA system is also called monitoring configuration software,…
Updated April 25, 2026 — Reviewed by Sino-Inst Engineering Team Static vs dynamic vs total pressure is the first question every pipeline, HVAC, and aerospace technician has to answer before…
What is a PID controller? A PID controller is an instrument used in industrial control applications to regulate temperature, flow, pressure, speed, and other process variables. PID is the abbreviation…
Updated: April 10, 2026 A pressure sensor converts mechanical pressure into an electrical signal. It is the sensing element inside every pressure transmitter, transducer, and switch used in industrial process…
An Air pressure transducer is a sensor that converts the mechanical signal of air pressure into a current signal. Pressure has a linear relationship with voltage or current, and it…
Sino-Inst is Manufacturer of high accuracy pressure transducers. We supply more than 50 kinds of high accuracy pressure transducers. Including diffused silicon, single crystal silicon, capacitive and other types of pressure transmitters.
High accuracy pressure transducers are used in automatic process control pressure measurement of liquid metallurgy, machinery, petroleum, electric power, chemical industry, compressor, light industry, textile, steam, sewage treatment equipment, heat transfer oil, etc.
It has good water resistance, small size, high cost performance and easy installation. The shell is made of stainless steel, which has good sealing, vibration resistance, stable and reliable performance.
Sino-Inst’s High accuracy pressure transducers, made in China, Having good Quality, With better price. Our pressure measurement instruments are widely used in China, India, Pakistan, the US, and other countries.
The entire team at Sino-Inst’s has received excellent training, so we can ensure that every client’s needs are met. For assistance with your product requirements, whether it’s a High accuracy pressure transducer, level sensor, or other device, give us a call.
Request a Quote
Please enable JavaScript in your browser to submit the form
Wu Peng, born in 1980, is a highly respected and accomplished male engineer with extensive experience in the field of automation. With over 20 years of industry experience, Wu has made significant contributions to both academia and engineering projects.
Throughout his career, Wu Peng has participated in numerous national and international engineering projects. Some of his most notable projects include the development of an intelligent control system for oil refineries, the design of a cutting-edge distributed control system for petrochemical plants, and the optimization of control algorithms for natural gas pipelines.
Flat Pressure Sensor is a type of pressure sensor that specifically refers to the measurement diaphragm without pressure holes. Also known as a flat film pressure sensor.
Flat Pressure Sensor is a special pressure sensor most commonly used in industrial automatic control. It is widely used in the pressure measurement and control of viscous media such as chemical coatings, paints, mud, asphalt, crude oil, etc. It solves the problem that conventional products are easy to block and cannot be used continuously, etc. defect.
The Flat Pressure Sensor elastomer adopts imported materials, diaphragm isolation technology, no pressure holes in the test head, and no viscous medium clogging during the measurement process.
The flat membrane pressure sensor test head adopts the pressure-free mode to ensure that there is no blockage of viscous media during the measurement process, and to ensure that the pressure detection works normally.
It adopts super-large diaphragm design, the core adopts highly sensitive material, diaphragm isolation technology, and integrated structure design.
The medium and high temperature pressure-sensitive chip and heat pipe structure are used in the measurement of high temperature medium, which effectively solves the drawbacks that the electronic components inside the sensor cannot withstand high temperature.
A pressure transducer often called a pressure transmitter, is a transducer that converts pressure into an analog electrical signal.
Although there are various types of pressure transducers, one of the most common is the strain-gage base transducer.
The conversion of pressure into an electrical signal, is achieved by the physical deformation of strain gauges, which are bonded into the diaphragm of the pressure transducer, and wired into a Wheatstone bridge configuration.
Pressure applied to the pressure transducer produces a deflection of the diaphragm, which introduces strain to the gages.
The strain will produce an electrical resistance change proportional to the pressure.
Fluid Pressure Sensors refers to sensors that can be used to measure the pressure of liquid media. Such as measuring pressure of Oil, Fuel and other fluid systems (select a sensor with the appropriate range for your system). Fluid Pressure Sensors have important uses. For example, the direct measurement of pressure in a fluid line. For example, put Fluid Pressure Sensors into the liquid, measure the liquid pressure, and estimate the liquid level. For example, by measuring the differential pressure of Fluid, the flow rate of the pipeline can be calculated.
There are many types of pressure sensors. Such as resistance strain gauge pressure sensors, semiconductor strain gauge pressure sensors, piezoresistive pressure sensors, inductive pressure sensors, capacitive pressure sensors, resonant pressure sensors, etc.
What Is Resistive Pressure Transducer? Resistive pressure transducers are also called resistance pressure transducers. It is a commonly used pressure sensor. Pressure sensors are generally distinguished by principle: capacitive pressure…
What Is a Smart Pressure Transmitter? Smart pressure transmitter is also called Smart pressure sensor or Smart pressure transducer. Smart pressure transmitter is the best pressure measuring instrument. It is…
What Is a Fluid Pressure Sensor? Fluid Pressure Sensors refers to sensors that can be used to measure the pressure of liquid media. Such as measuring pressure of Oil, Fuel…
What is underwater pressure transducer? Underwater pressure transducer refers to a type of pressure sensor that can be used underwater for a long time. The degree of protection of the…
High Temperature Pressure Transducer is also called High Temperature Pressure Sensor, or High Temperature Pressure Transmitter. The High Temperature Pressure Transducer is used for applications where the medium temperature exceeds…
What is a ceramic pressure sensor? Ceramic pressure sensors are sensor diaphragms made of ceramic alumina (Al2O3). Ceramic is a material with high elasticity, corrosion resistance, wear resistance, impact, and…
What Is Static Water Pressure? Definition of Static Water Pressure: Static Water Pressure refers to the pressure on water when it is stationary or moving in a straight line at…
The Hydrostatic Pressure Transmitter measures the hydrostatic pressure exerted by a hydrostatic head. Use these hydrostatic pressure transmitters to measure the liquid level in storage tanks, processing vessels, collection tanks,…
Updated: April 21, 2026 | Sino-Inst Engineering Team The cheapest way to convert a 4-20 mA loop signal into a voltage for a PLC or recorder analog input is a…
Updated April 25, 2026 — Reviewed by Sino-Inst Engineering Team Static vs dynamic vs total pressure is the first question every pipeline, HVAC, and aerospace technician has to answer before…
An Air pressure transducer is a sensor that converts the mechanical signal of air pressure into a current signal. Pressure has a linear relationship with voltage or current, and it…
Cryogenic pressure transducer for low temperature pressure measurement. -196℃～+125℃, -260℃/-350℃ (special models). Sino-Inst offers a variety of low pressure transducers for industrial pressure measurement. If you have any questions, please…
Dynamic pressure sensor, the transmitter is a high frequency sensor. Sino-Inst offers a variety of Dynamic Pressure Sensors for pressure measurement. If you have any questions, please contact our sales…
Updated on April 18, 2026 — Most DP transmitter measurement errors trace back to installation mistakes — not faulty hardware. Incorrect mounting orientation, improperly sloped impulse lines, or a skipped…
In the chemical production, the medium often encounters problems such as impurities, crystal particles or agglomeration. It is easy to block the connecting pipeline. At this time, a flange-type differential…
Sino-Inst is Manufacturer of Flat pressure sensors. For High Viscosity Fluids-Chemical Coatings – Paints – Slurry – Asphalt – Crude Oil. We supply more than 20 kinds of Flat pressure sensors.
Flat pressure sensors are mainly used for highly viscous media. It can measure even liquids such as water, seawater, oil, and slurry.
Flat pressure sensors are also called: Sludge flat film pressure sensor, sludge flat film pressure transmitter, glue level film pressure sensor, glue level film pressure transmitter, paint flat film pressure sensor, paint pressure transmitter, chemical paint flat Mask type pressure sensor, chemical paint pressure transmitter, mud pump pressure sensor.
These high viscosity fluid pressure sensors can be cleaned if residue builds up around process connections because there are no hidden voids and all surfaces in contact with the viscous fluid are accessible.
Sino-Inst’s Flat pressure sensors, made in China, Having good Quality, With better price. Our pressure measurement instruments are widely used in China, India, Pakistan, the US, and other countries.
The entire team at Sino-Inst’s has received excellent training, so we can ensure that every client’s needs are met. For assistance with your product requirements, whether it’s a Flat pressure sensor, level sensor, or other device, give us a call.
Request a Quote
Please enable JavaScript in your browser to submit the form
Wu Peng, born in 1980, is a highly respected and accomplished male engineer with extensive experience in the field of automation. With over 20 years of industry experience, Wu has made significant contributions to both academia and engineering projects.
Throughout his career, Wu Peng has participated in numerous national and international engineering projects. Some of his most notable projects include the development of an intelligent control system for oil refineries, the design of a cutting-edge distributed control system for petrochemical plants, and the optimization of control algorithms for natural gas pipelines.
Resistive pressure transducers are also called resistance pressure transducers. It is a commonly used pressure sensor. Pressure sensors are generally distinguished by principle: capacitive pressure transmitters, resistive pressure transducers, inductive pressure transmitters, semiconductor pressure transmitters, and pressure transmitters for high-frequency measurement. Among them, resistance pressure transmitters are commonly used. Resistance strain pressure sensor is a kind of resistance pressure sensor. It measures the pressure value by the resistance change of the strain gauges bonded to the elastic element.
The functional principle of a resistive pressure transducer is very simple. A pressure sensor converts a mechanical pressure value into a proportional electrical signal. Pressure sensors usually consist of a body and a (thin) diaphragm.
The electrical components of resistance pressure transmitters that feel pressure are generally resistance strain gauges. Resistance strain gauges are sensitive devices that convert the pressure on the measured component into an electrical signal.
The diaphragm is the most important element for pressure measurement and is equipped with strain-sensitive and piezoresistive structures, so-called strain gauges. The diaphragm deflects under pressure.
The most widely used resistance strain gauges are metal resistance strain gauges and semiconductor strain gauges. There are two types of metal resistance strain gauges: filamentary strain gauges and metal foil strain gauges.
Usually, the strain gauge is tightly bonded to the matrix that generates mechanical strain through a special adhesive. When the stress of the matrix changes, the resistance strain gauge also deforms together, which changes the resistance value of the strain gauge. The voltage across the resistor changes.
For example, if a resistor is connected to a Wheatstone measurement bridge, an electrical signal can be measured and transmitted to the indicator.
Let’s talk about the classification of transmitters:
According to the working principle of the sensor, it can be divided into resistance, capacitance, inductance, semiconductor, etc.;
According to the classification of sensor chips, it can be divided into metal, ceramic, diffused silicon, sapphire, etc.;
According to the measurement range, it can be divided into differential pressure, gauge pressure, absolute pressure, high static pressure and differential pressure, etc.;
Resistive pressure transducers are the most widely used transmitters and have the advantages of high cost performance and good linearity characteristics.
Resistive pressure transducers are generally divided into metal, ceramic, and diffused silicon according to pressure-sensitive components.
The difference between the three:
The metal pressure transmitter has poor accuracy, but the temperature effect is small, and it is suitable for fields with a wide temperature range and low accuracy requirements.
The accuracy of ceramic pressure sensors is better, but it is greatly affected by temperature. Another advantage of ceramics is impact resistance and corrosion resistance.
Diffusion silicon pressure transmitter has high precision and large temperature drift, so it is generally necessary to perform temperature compensation before it can be used. And even after temperature compensation, pressures above 125°C cannot be measured. However, under normal temperature conditions, the sensitivity coefficient of diffused silicon is 5 times that of ceramics. Therefore, it is generally used in the field of high-precision measurement, but the accuracy is low in the micro-range.
Piezoresistive pressure sensor refers to a sensor made by using the piezoresistive effect of single crystal silicon material and integrated circuit technology.
After the single crystal silicon material is subjected to the force, the resistivity changes, and the electrical signal output proportional to the force change can be obtained through the measurement circuit.
It is also known as a diffused silicon piezoresistive pressure sensor. It is different from the adhesive strain gauge, which needs to indirectly feel the external force through the elastic sensitive element, but directly feels the measured pressure through the silicon diaphragm.
Capacitive pressure transducer (capacitive type pressure transducer) is a pressure sensor that uses capacitive sensing elements to convert the measured pressure into an electrical output that has a certain relationship with it. The characteristics are that the input energy is low, the dynamic response is high, the natural effect is small, and the environmental adaptability is good.
It generally uses a circular metal film or a metal-plated film as an electrode of the capacitor. When the film is deformed by pressure, the capacitance formed between the film and the fixed electrode changes. By measuring the circuit, the output voltage has a certain relationship with the voltage. electric signal.
The differential pressure transmitter is a transmitter that measures the pressure difference between the two ends of the transmitter, and outputs a standard signal (such as 4~20mA, 0~5V).
Differential pressure transmitters are different from general pressure transmitters in that they have 2 pressure interfaces. Differential pressure transmitters are generally divided into positive pressure ends and negative pressure ends.
In general, the pressure at the positive pressure end of the differential pressure transmitter should be greater than the pressure at the negative pressure section to measure.
The differential pressure transmitter is used to prevent the medium in the pipeline from directly entering the transmitter, and the pressure-sensitive diaphragm and the transmitter are connected by a capillary filled with fluid.
It is used to measure the liquid level, flow and pressure of liquid, gas or steam. Then convert it into 4～20mA DC signal output.
Potentiometric pressure transducers are usually used for displacement, level and angle measurement.
The measured component is connected to the rotating shaft (or sliding arm) of the potentiometer through a certain mechanical transmission part. When the measured change changes, the sliding arm moves, and the resistance from the center of the potentiometer to the two fixed ends changes differentially.
The resistance change of the potentiometer can be converted into a voltage change output through a voltage divider circuit or a bridge circuit, and after A/D conversion, the measured physical quantity can be accurately measured. !
The hydraulic pressure transducer is mainly used in the pressure measurement of industrial equipment such as construction machinery, special equipment, compressors, injection molding machines, and servo equipment. It has good waterproof, small size and high cost performance. It is easy to install. The whole structure is made of stainless steel, which has good sealing, vibration resistance and stable and reliable performance.
Hydraulic pressure transducer is the extension and development of pressure transmitter technology. According to the principle that the pressure generated by different specific gravity liquids at different heights is linear. Realize the accurate measurement of the volume, liquid height and weight of water, oil and paste. Measure and transmit.
Strain Gauge Pressure Transducer Working Principle
The strain gauge pressure transducer works based on the principle of resistance strain effect.
There are two types of resistance strain gauges: metal strain gauges (wire or metal foil) and semiconductor strain gauges. The measured pressure strains the strain gauge.
When the strain gauge produces compressive strain, its resistance decreases. When the strain gauge produces tensile strain, its resistance increases.
The resistance value of the strain gauge changes, and then the corresponding millivolt-level potential output is obtained through the bridge circuit. The measured pressure is displayed by a millivoltmeter or other recording instruments. Thus, a strain gauge pressure gauge is formed.
Strain gauge structure: It consists of three parts: strain sensitive element, substrate and cover layer, and lead wire. Strain-sensitive elements are generally composed of metal wires and metal foils (high resistivity materials), which convert mechanical strain into changes in resistance. The substrate and cover layer serve to fix and protect sensitive components, transmit strain and electrically insulate.
Resistance strain pressure sensor structure: diaphragm type, cylinder type, combined type. Among them, the diaphragm type is suitable for low pressure measurement; the cylinder type is suitable for high pressure measurement.
The working mode of the resistance strain pressure sensor: the change of resistance is converted into the output of current or voltage signal through the unbalanced bridge.
Using a multimeter to test the pressure sensor can only perform simple tests, and the test results are only for reference. There are roughly three tests that can be performed:
Bridge detection: It mainly detects whether the circuit of the sensor is correct. Generally, it is a Wheatstone full-bridge circuit, which uses the ohm gear of the multimeter to measure the impedance between the input terminals and the impedance between the output terminals. These two impedances are the input and output of the pressure sensor. impedance. If the impedance is infinite, the bridge is disconnected. It means that there is a problem with the sensor or the definition of the pin is not correctly judged;
Detection of zero point: Use the voltage range of the multimeter to detect the zero output of the sensor without applying pressure. This output is generally a mV level voltage. If it exceeds the technical specifications of the sensor, it means that the zero point deviation of the sensor is out of range;
Pressure detection: The method of checking the order is: supply power to the sensor, blow the air guide hole of the pressure sensor with the mouth, and use the voltage range of the multimeter to detect the voltage change at the output end of the sensor. If the relative sensitivity of the pressure sensor is large, this amount of change will be significant. If there is no change at all, you will need to switch to an air pressure source to apply pressure.
These types of sensors are also called pressure transmitters. Because 4-20mA signals are least affected by electrical noise and resistance in the signal line, these sensors are best used when signals must be transmitted over long distances. These sensors are typically used in applications where the lead must be 1000 feet or more.
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Sino-Instrument is a globally recognized supplier and manufacturer ofResistive Pressure Transducers, located in China.
The top supplying country is China (Mainland), which supply 100% of Resistive Pressure Transducers respectively.
Sino-Instrument sells through a mature distribution network that reaches all 50 states and 30 countries worldwide.
Resistive Pressure Transducer products are most popular in Domestic Market, Southeast Asia, and Mid East.
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Wu Peng, born in 1980, is a highly respected and accomplished male engineer with extensive experience in the field of automation. With over 20 years of industry experience, Wu has made significant contributions to both academia and engineering projects.
Throughout his career, Wu Peng has participated in numerous national and international engineering projects. Some of his most notable projects include the development of an intelligent control system for oil refineries, the design of a cutting-edge distributed control system for petrochemical plants, and the optimization of control algorithms for natural gas pipelines.
Fluid Pressure Sensors refers to sensors that can be used to measure the pressure of liquid media. Such as measuring pressure of Oil, Fuel and other fluid systems (select a sensor with the appropriate range for your system). Fluid Pressure Sensors are also called liquid pressure sensor or liquid pressure transducer. Fluid Pressure Sensors have important uses. For example, the direct measurement of pressure in a fluid line. For example, put Fluid Pressure Sensors into the liquid, measure the liquid pressure, and estimate the liquid level. For example, by measuring the differential pressure of Fluid, the flow rate of the pipeline can be calculated.
An instrument for measuring fluid pressure. Usually the measured pressure is compared to a reference pressure (such as atmospheric pressure or other given pressure), thus measuring the relative pressure or pressure difference.
According to the working principle, it can be divided into three types: liquid column, elastic and sensor.
The principle of the pressure sensor is to convert the pressure signal into an electrical signal. Such as strain type, elastic element deformation caused by resistance change. Piezoelectric, the use of piezoelectric effect.
Various pressure sensors can be miniaturized, more accurate and fast to measure, especially to measure dynamic pressure, realize multi-point inspection, signal conversion, long-distance transmission, computer connection, timely processing, etc., so as to develop rapidly and widely used.
Fluid pressure sensors are mainly used in: construction machinery, hydraulic and pneumatic systems, petrochemicals, energy and water treatment, water conservancy and hydropower, compressors and other fields:
In the hydraulic system, the pressure sensor is mainly used to complete the closed-loop control of the force. Extended reading: Hydraulic oil flow measurement solutions.
When the control spool moves suddenly, a peak pressure several times the working pressure of the system will be formed in a very short period of time.
In typical mobile and industrial hydraulics, any pressure sensor can quickly be destroyed if not designed with such extreme conditions in mind.
Shock-resistant pressure sensors are required. There are two main ways for pressure sensors to achieve shock resistance, one is a strain gauge chip, and the other is an external coil. Generally, the first method is used in hydraulic systems, mainly because Easy to install.
Another reason is that the pressure sensor is subject to constant pressure pulsations from the hydraulic pump.
Fluid pressure sensors are often used in safety control systems, such as the safety management system of the air compressor itself.
In the field of security control, the application is generally considered from the performance aspect, as well as the safety and convenience of the actual operation.
The fluid pressure sensor can install some components and signal conditioners and other devices on a very small chip through materials and advanced processing technology. Therefore, its small size is also its advantage. Of course, it can also improve the accuracy of system testing to a certain extent. .
In the safety control system, the pressure brought by the compressor is controlled to a certain extent by installing a pressure sensor in the piping equipment of the air outlet. This is a certain protection measure and a very effective control system.
When the compressor starts normally, if the pressure value does not reach the upper limit, then the controller will open the air inlet and adjust the equipment to reach the maximum power.
Fluid pressure sensors play an important role in injection molds.
It is installed in the nozzle of the injection molding machine, the hot runner system, the cold runner system and the cavity of the mold to measure the distance between the nozzle of the injection molding machine and the cavity during the injection molding, filling, pressure holding and cooling of the plastic. plastic pressure.
There are many kinds of pressure sensors, for the special environment of mine pressure monitoring.
Mine pressure sensors mainly include: semiconductor piezoresistive pressure sensors, metal strain gauge pressure sensors, differential transformer pressure sensors, etc.
The above sensors are widely used in the mining industry, and the specific sensor to be used needs to be selected according to the specific mining environment.
Pressure sensors are commonly used in air compressors, as well as air conditioning and refrigeration equipment. These sensor products are small in size and easy to install. In addition, the pressure guide port generally adopts a special valve needle design.
In physics, the pressure P of a liquid is determined by the relationship: p=pgh.
For the same kind of liquid, the liquid density p is constant. Therefore, the pressure P of the liquid is linearly proportional to the height h of the liquid surface (the height from the liquid surface).
It is not difficult to find that the pressure of the liquid at different heights of the liquid level is also different.
As shown in the figure above, when the pressure sensor is used to measure the liquid level, the pressure sensor is installed at the bottom of the tank. When the liquid level in the tank changes, the height h from the tank bottom to the liquid level also changes at the same time, and the pressure naturally changes accordingly, thus achieving the purpose of continuous measurement.
One of the advantages of using pressure sensors for liquid level measurement is non-contact. Compared with mechanical and static methods, when measuring, it does not require too many parts to contact the liquid, and the installation is relatively convenient.
In addition, in terms of measurement principle, compared with similar non-contact measurement methods such as laser and ultrasonic, the relationship of pressure sensor measurement principle is simpler and linear, and it is more intuitive in data processing, analysis and processing.
The pressure of the fluid is an extremely important parameter in flow measurement. Differential pressure flowmeter uses the pressure difference at both ends of the throttling element to realize flow measurement.
In addition, the working pressure of the flowmeter can be known through pressure measurement, and necessary correction calculations are performed to ensure the accuracy of flow measurement.
If we make the pressure sensor into a submersible sensor, it can be used to measure the depth of the liquid.
The most common fluid depth pressure sensor is what we often call the submersible hydrostatic pressure sensor. Used to measure the depth or level of liquids such as water, fuel.
Hydrostatic level measurement is often used for tank level measurement. Hydrostatic level measurement is one type of continuous level measurement.
Hydrostatic pressure sensors are used to measure the level or fill height of liquids. Hydrostatic pressure measurement is suitable for liquid level measurement due to the static pressure effect of non-flowing fluids. This physical principle describes the effect of the gravity of a stationary (i.e. non-flowing) liquid on the measurement point. This gravity is often described as “hydrostatic pressure”.
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Nonlinear error: This is a factor that has little effect on the initial error of the pressure sensor. The reason for the error is the physical nonlinearity of the silicon chip, but for sensors with amplifiers, the nonlinearity of the amplifier should also be included, the linearity error curve can be a concave or convex dynamometer.
Offset error: Since the vertical offset of the pressure sensor remains constant over the entire pressure range, the diffusion variation of the converter and laser trim correction will generate offset errors.
Sensitivity error: The magnitude of the error is proportional to the pressure, if the sensitivity of the device is higher than the typical value, the sensitivity error will be an increasing function of the pressure. If the sensitivity is lower than typical, then the sensitivity error will be a decreasing function of pressure. The cause of this error is a change in the diffusion process.
Hysteresis error: In most cases, the hysteresis error of the pressure sensor can be completely ignored. Because the silicon chip has high mechanical stiffness. Typically, only hysteresis errors need to be considered when pressure changes are large.
Four errors of pressure sensors are inevitable. We can only choose high-precision production equipment. Using high technology to reduce these errors, it is also possible to perform error calibration at the factory and try to reduce errors as much as possible. Therefore, you don’t need to pay too much attention when using it, but try to reduce these errors as much as possible.
Please note that Pressure Transmitter Calibration is required after the pressure transmitter has been used for a period of time. In order to ensure the accuracy of the quantity.
A pressure transducer often called a pressure transmitter, is a transducer that converts pressure into an analog electrical signal.
Although there are various types of pressure transducers, one of the most common is the strain-gage base transducer.
The conversion of pressure into an electrical signal, is achieved by the physical deformation of strain gauges, which are bonded into the diaphragm of the pressure transducer, and wired into a Wheatstone bridge configuration.
Pressure applied to the pressure transducer produces a deflection of the diaphragm, which introduces strain to the gages.
The strain will produce an electrical resistance change proportional to the pressure.
Flow is an important parameter in industrial production and life. The amount of fluid flowing through a section of a pipe per unit time is called instantaneous flow. Instantaneous flow is divided into volume flow and mass flow. A flow sensor is a sensor that measures the flow of a fluid. Flow sensor is an important instrument in measurement technology, it is widely used in industrial process control, life science and technology, commercial application, military and other fields. In recent years, with the development of science and technology and the development of human needs, flow sensors are also constantly developing.
In the hydraulic system, the closed-loop control of the force is mainly caused by the pressure sensor. The working principle of the pressure sensor in the hydraulic system is that the pressure acts directly on the diaphragm of the sensor. Make the diaphragm produce micro-displacement proportional to the medium pressure. Causes the resistance of the sensor to change. And by using an electronic circuit to detect the change, a standard signal corresponding to the pressure is converted and output.
Sino-Inst offers over 50 pressure sensors for fluid measurement. About 50% of these are differential pressure flow meters, 40% is the liquid pressure sensor, and 20% are pressure Level Transmitter.
A wide variety of Fluid Pressure Sensors options are available to you, such as free samples, paid samples.
Sino-Instrument is a globally recognized supplier and manufacturer of pressure measurement instrumentation, located in China.
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Wu Peng, born in 1980, is a highly respected and accomplished male engineer with extensive experience in the field of automation. With over 20 years of industry experience, Wu has made significant contributions to both academia and engineering projects.
Throughout his career, Wu Peng has participated in numerous national and international engineering projects. Some of his most notable projects include the development of an intelligent control system for oil refineries, the design of a cutting-edge distributed control system for petrochemical plants, and the optimization of control algorithms for natural gas pipelines.
