Gas Pressure Transducer for industrial gas pressure measurement. Pagoda gas nozzle Φ8. It is used to measure the pressure of weak corrosive gases such as natural gas and exhaust gas pressure sensor.
SI-503K Pagoda Joint Gas Pressure Transducer uses stainless steel as a whole. High-precision strain gage and advanced technology. It has high sensitivity, stable performance and good impact resistance. GB 304 stainless steel welding. Small and compact structure. Has good moisture resistance and excellent media compatibility. Can measure weakly corrosive liquids and gases.Widely used in industrial equipment: Water conservancy. Chemical, medical. Electric power, air conditioning. Vehicle braking and other pressure measurement and control.
Sino-Inst offers a variety of Gas Pressure Transducers for industrial pressure measurement. If you have any questions, please contact our sales engineers.
Gas pressure transducer is a special sensor that converts gas pressure into current and voltage signals.
For gas pressure measurement the solution of pressure sensor is used to accomplish the significance of measurement.
Pressure sensors for gas pressure measurement are mainly conversion devices used to measure the absolute pressure of gases.
It can be used for pressure measurement in terms of blood pressure, wind pressure, pipeline gas, etc. It has a stable and reliable performance.
It is mainly suitable for physical experiments related to gas pressure. Such as gas laws, etc. It can also be used in biological and chemical experiments to measure the pressure of dry, non-corrosive gases.
In short, a pressure sensor converts pressure into a small electrical signal, which is sent and displayed. Therefore, these are also commonly referred to as pressure transmitters. Two common signals used are 4 to 20 mA signals and 0 to 5 volt signals. Most pressure sensors work using the piezoelectric effect. This is when the material generates a charge in response to stress. This stress is usually compressive, but may be twisted, bent, or vibrated.
Pressure sensors detect pressure and can determine the amount of pressure by measuring the charge.
The pressure sensor needs to be calibrated in order to know what voltage or milliamp (mA) signal corresponds to what pressure. This is the basic “zero” and “span” calibration or minimum and maximum, which is a common job for maintenance personnel.
The price of gas pressure Transducers is mainly affected by the following factors:
Measuring medium
Does the gas contain particles?
Gas temperature
Gas corrosive
Explosion-proof performance
Interface size
Signal output, etc.
Gas pressure Transducer price reference range: USD80-800.00/pc
Natural gas pressure Transducer is 4-20mA current output sensors for monitoring the pressure of natural gas. Measure very low inlet and output pressure or very high natural gas bottle pressures. Where there is the potential for natural gas to be present in the local atmosphere, special approval options such as ATEX intrinsic safety are available.
Natural gas pipelines are pipelines that transport natural gas (including associated gas produced in oil fields) from mining sites or treatment plants to urban gas distribution centers or industrial enterprise users, also known as gas pipelines. Using natural gas pipelines to transport natural gas is the only way to transport large amounts of natural gas on land. Natural gas pipelines account for about half of the total pipeline length in the world.
Residential gas inlet pipes should be installed in non-residential rooms such as kitchens, corridors, and enclosed balconies connected to the kitchen (the balconies should be closed when transporting wet gas in cold areas) and other non-residential rooms that are convenient for maintenance. When it is really difficult, it can be introduced from the stairwell, but metal pipes and inlet pipe valves should be installed outdoors.
The gas introduction pipes of commercial and industrial enterprises should be installed in the rooms or gas meter rooms where gas is used.
The gas introduction pipe should be introduced through the wall along the ground on the outer wall. The upper bend of the outdoor exposed pipe section should be installed with no less than DN15 cleaning tee and wire plug, and treated with anti-corrosion treatment. Keep warm when transporting wet gas in cold areas. The introduction pipe can be buried into the room through the outer wall or foundation of the building. When the introduction pipe penetrates the wall or foundation and enters the building, it shall exit the indoor ground within a short distance, and shall not be laid horizontally under the indoor ground.
The sensors used to detect natural gas pipelines can be used to detect the pressure of natural gas pipelines with explosion-proof verification and regular gas pipeline pressure sensors and gas pressure Transducers.
The air pressure sensor is used to measure the absolute pressure of the gas. It is mainly suitable for physical experiments related to gas pressure, such as gas laws, etc. It can also measure dry and non-corrosive gas pressure in biological and chemical experiments.
The air pressure sensor is mainly used to measure the pressure of the gas. One of the atmospheric pressure sensors is usually used to measure changes in weather and use the corresponding relationship between air pressure and altitude for altitude measurement.
The air pressure sensor is a detection device that can feel the measured information, and can transform the detected and felt information into electrical signals or other required forms of information output according to a certain rule to meet the needs of information transmission, processing, and Storage, display, recording and control requirements.
Pressure transmitter types include gauge pressure, absolute pressure, and differential pressure. Gauge pressure refers to the pressure that is less than or greater than atmospheric pressure based on the atmosphere. Absolute pressure refers to the absolute zero pressure as the reference and is higher than the absolute pressure. Differential pressure refers to the difference between two pressures.
According to the working principle of the pressure transmitter:
Gas pressure Transducer is mainly used to measure the absolute pressure of gas conversion device. It can be used for pressure measurement of blood pressure, wind pressure, pipeline gas, etc. Its performance is stable and reliable, and it is mainly suitable for physical experiments related to gas pressure, such as gas laws. It can also measure the pressure of dry, non-corrosive gases in biological and chemical experiments.
The Gauge Pressure Transmitter SMT3151 TGP, has been specially designed for the process industry, and measures vacuum, gauge and absolute pressure ranges of gases, steam, fluids, and dust up to 600 bar.
Flush diaphragm pressure sensor has Flush membrane / diaphragm structure, anti-blocking design. Pressure measurement of viscous media.
Flush diaphragm pressure sensor uses a diaphragm isolation process. Feel the pressure directly with a flat membrane. There is no pressure hole in the test head. There is no clogging of viscous media during the measurement.
Cryogenic pressure transducer for low temperature pressure measurement. -196℃～+125℃、-260℃/-350c（especial）. Sino-Inst offers a variety of Pressure Sensors…
In the chemical production, the medium often encounters problems such as impurities, crystal particles or agglomeration…
Q&A
What is pressure transducer used for?
The main function of a pressure transmitter is to transmit pressure signals to electronic equipment. The pressure is then displayed on the computer. For example, the mechanical signal of water pressure is converted into an electronic signal such as voltage or current (usually 0-5V or 4-20mA). Pressure and voltage or current have a linear relationship. It is generally proportional, so the voltage or current output by the transmitter increases with increasing pressure. A pressure transmitter is a sensor commonly used in industrial practice. It is widely used in various industrial automatic control environments. Involving water conservancy and hydropower, railway transportation, intelligent buildings, production control, aerospace, military industry, petrochemicals, oil wells, electric power, ships, machine tools, pipelines and many other industries. The pressure transmitter workshop must be in direct contact with the measured medium. Often run in high temperature, low temperature, corrosion, vibration, shock and other environments. Whether it works normally on the job site depends not only on the quality of the product. It also depends on optimized engineering design and reasonable model configuration. And proper installation and maintenance. Pressure transmitters are a key element in the fluid industry. Pressure transmitters are mainly used in the following areas: 1.Petroleum, petrochemical, chemical industry, supporting with throttling devices. Provides accurate flow measurement and control. Measures pressure and level in pipes and tanks. 2.Electric power, city gas, and other companies. Places requiring high stability and high accuracy measurement. 3.Pulp and papermaking are used in places that require chemical-resistant liquids and corrosion-resistant liquids. 4. Steel, non-ferrous metals, ceramics, used in furnace pressure measurement and other places requiring high stability, high precision measurement and other places. It is used in places where stable measurement is required under strict control (temperature, humidity, etc.). 5. Machinery and shipbuilding, used to strictly control the place where high precision is required for stable measurement. In general, the pressure transmitter is mainly used to measure the pressure of the medium and the liquid level.
Sino-Inst is Chinese manufacturer of Gas pressure Transducers for industrial gas pressure measurement.
Gas pressure Transducer for industrial gas pressure measurement which are widely used in India, US, South Africa, and other countries.
Contact us any time, if you need the quotation or technical support.
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.
Flush diaphragm pressure sensor is also called flush diaphragm pressure transducer or flush diaphragm pressure transmitter. Flush diaphragm pressure sensor has Flush membrane / diaphragm structure, anti-blocking design. Pressure measurement of viscous media.
Flush diaphragm pressure sensor uses a diaphragm isolation process. Feel the pressure directly with a flat membrane. There is no pressure hole in the test head. There is no clogging of viscous media during the measurement. Adopting flush membrane structure, diffused silicon pressure-sensitive core body, with good moisture resistance and excellent media compatibility. The sensor interface is available in clamp, thread and flange options. The output signal can be selected from voltage, current, and so on. The flush diaphragm of the sensor prevents problems such as scaling, unsanitary and clogging of viscous liquids.
Sino-Inst offers a variety of Flush diaphragm pressure sensors for industrial pressure measurement. If you have any questions, please contact our sales engineers.
This type of pressure sensor is also commonly known as: Flat film pressure sensor. Diaphragm pressure transmitter. Paint pressure sensor. Food pressure sensor. Diaphragm pressure sensor. Diaphragm pressure transmitter. Or sanitary pressure transmitter.
Flush diaphragm pressure sensor, including strain type and diffused silicon front type.
The strain-type flush-membrane measuring end adopts a special, sturdy flush diaphragm. Hard particles in the measured medium will not damage the isolating diaphragm. Compact structure, corrosion resistance, anti-vibration, anti-particle impact, wide temperature compensation.
Diffusion silicon front type is made of imported diffusion silicon core. Use calibration and digital compensation technology. The product has reliable performance and stable output.
Features of SI-703 Flush diaphragm pressure sensor
The imported resistance strain gauge is used as a pressure-sensitive chip. The anti-blocking design of the flush membrane / diaphragm structure can measure viscous media.
Advanced patch technology and process;
It can bear large impact pressure, and the bearing pressure can reach 100MPa;
The temperature drift is small, and it can work stably at the working temperature of -20 ~ 85 ℃ for a long time;
The elastomer is also connected to the joint using a fully sealed or integrated structure. Solve the oil / gas shortcomings of diffused silicon and ceramic core pressure sensor cores. Reliable work and high fatigue strength;
The sensor’s Flush diaphragm structure prevents problems such as scaling, unsanitation, and sticky liquid clogging. Widely used in food, pharmaceutical, brewing and other process control fields. It is suitable for the pressure measurement and control of viscous media such as chemical coatings, paints, muds, asphalts, and crude oil under weak pressure. Its industry applications are as follows:
Food hygiene industry;
Paper industry;
Sewage level measurement;
Beverage tank liquid level measurement;
Pipeline level measurement;
Pharmaceutical and biological products processing.
Flush diaphragms appear flush from the surface, so they are called flush diaphragms.
A flush diaphragm is a diaphragm that is fully open and exposed to the pressure medium. The flush diaphragm is level or slightly recessed with the surrounding surface when installed.
The purpose of the flush membrane is to prevent the viscous medium from blocking the pressure hole, or to use a special material for better measurement with the medium to avoid damage to the sensor chip material, etc.
In short, the way to measure or protect the sensor according to the specific application
Flush pressure sensor refers specifically to Pressure Sensors with Flush Diaphragms. Pressure transmitters and transducers with open flush diaphragms suitable for use with highly viscous media such as plastics, paper pulp, bitumen, sewage, paint and adhesives.
Internal diaphragm is the industry standard for most gaseous and liquid media because it is inexpensive and easy to handle.
However, once it encounters the measurement of viscous media, or in the case of high hygiene requirements. Keeping the Flushing connection can effectively avoid blockage. And meet the sanitary cleaning requirements.
Flush Mount Diaphragm can be: Clamp flat film installation, threaded flat film installation, or flange flat film installation. Sometimes there are customers who need special cavityless flat membranes.
Clamp Flush Membrane Pressure Sensor
The clamp type adopts a silicone oil filling technology, and the pressure felt by the diaphragm is transmitted to the pressure chip through the silicone oil. The compensation circuit corrects the pressure signal to a linear electrical signal.
The stressed diaphragm on the end face of the clamp is exposed to directly feel the pressure. Prevents scaling, unsanitary and sticky pressure clogging problems. It is widely used in hygiene industries such as food, medicine, brewing and other occasions where the measuring medium may be fouled.
Threaded flush membrane pressure sensor
The threaded flush Diaphragm pressure transmitter uses a flat membrane to directly sense the pressure signal. The diffusion silicon pressure core is used as the sensitive element. The standard silicone oil or olive oil is used as the pressure transmission medium.
The measuring end is made of 316L stainless steel, and the flush isolation diaphragm is specially welded. Compact structure, corrosion resistance, vibration resistance, wide temperature compensation.
Flange flush Diaphragm pressure transmitter
Shell optional;
flange mounting;
Two-wire system, 4～20mA analog output, HART® protocol digital communication;
Smart LCD head with backlight;
Large-size diaphragm, fully welded and sealed, long-term reliability and durability;
For pressure measurement of gas, liquid, steam;
Anti-corrosion diaphragm is optional (tantalum, Kazakhstan C, 316L, 316L sprayed with PTFE);
Especially suitable for high temperature viscous liquid;
Cavityless flush Diaphragm pressure transmitter
Cavityless flush Diaphragm pressure transmitter
The cavityless flush Diaphragm pressure transmitter adopts a high-precision foil strain gauge and has no cavity to measure the diaphragm. It is especially suitable for measuring liquids with high viscosity.
The product adopts an improved and optimized installation structure, which makes the product have good anti-vibration ability.
Equipped with a variety of characteristic amplifying circuits, such as anti-interference, high temperature resistance, intrinsically safe explosion-proof, etc., making the modification suitable for various measurement and control occasions such as oil fields and food.
Working Principle
Flush diaphragm pressure sensors use processes such as diffusion or ion implantation to form resistors and connect them to a Wheatstone bridge. Micro-machining technology is used to form a pressure-sensitive diaphragm under the bridge. When pressure is applied to the diaphragm, the resistance value changes and a linearized output signal is generated that is proportional to the applied pressure. When we add DC power to the Wheatstone bridge, a DC voltage signal will be output. After the second conversion line, the two-wire system 4 ~ 20MA output is realized.
When to Use a Flush Diaphragm Pressure Connection？
In short, there are two cases, we can first consider Flush Diaphragm Pressure Connection.
The first is hygienic applications. Such as Pharmaceutical, Food, Beverage & Biotech.
For these applications the concern is not necessarily high viscosity but more to do with cleanliness. The wetted part of the Flush Diaphragm Pressure Sensor is flat. No holes, no ripples. This way, residue-free cleaning is easy.
The media may be too hard to adequately fill the internal voids of the pressure connector. Or once the process cools, the substance may wax. For these types of substances, it is necessary to specify a flushing connection in which the diaphragm is fully open.
Some pressure transducers have the option of flush-embedded diaphragms where mechanical damage to the diaphragm is a concern.
WIKA has a great video on When to use a front-flush pressure connection? Let’s take a look.
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 the temperature limits of standard pressure transmitters. By assembling Cooling … Continue reading →
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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, pump inlet heads. And other applications use hydrostatic pressure to … Continue reading →
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4-20mA to 0-10v voltage, this is I/V conversion. That is current-voltage conversion, usually used for long-distance signal transmission in the industry. How to convert a 4-20mA to 0-10V /1-5V signal? There are two methods: one is to do it yourself … Continue reading →
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What is a pressure sensor? A pressure sensor is a device that senses a pressure signal and converts the pressure signal into a usable output electrical signal according to certain rules. Pressure sensors have a variety of structural types. Common … Continue reading →
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What is a piezoelectric pressure sensor? The piezoelectric pressure sensor is a sensor that uses the piezoelectric effect of piezoelectric materials to convert the measured pressure into an electrical signal. Use electrical components and other machinery to convert the pressure … Continue reading →
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 is generally proportional. Therefore, the output voltage or current of … Continue reading →
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Cryogenic pressure transducer for low temperature pressure measurement. -196℃～+125℃、-260℃/-350c（especial）. Sino-Inst offers a variety of Pressure Sensors for pressure measure and control. If you have any questions, please contact our sales engineers. What is Cryogenic pressure transducer? The Cryogenic pressure sensor … Continue reading →
Intrinsically safe vs explosion proof is a common function of pressure transmitters. When pressure transmitters need to be used in high-risk and explosive places, you must know it! Sino-Inst offers a variety of explosion-proof pressure transmitters. If you have any … Continue reading →
In short, a pressure sensor converts pressure into a small electrical signal, which is sent and displayed. Therefore, these are also commonly referred to as pressure transmitters. Two common signals used are 4 to 20 mA signals and 0 to 5 volt signals.
Most pressure sensors work using the piezoelectric effect. This is when the material generates a charge in response to stress. This stress is usually compressive, but may be twisted, bent, or vibrated.
Pressure sensors detect pressure and can determine the amount of pressure by measuring the charge.
The pressure sensor needs to be calibrated in order to know what voltage or milliamp (mA) signal corresponds to what pressure. This is the basic “zero” and “span” calibration or minimum and maximum, which is a common job for maintenance personnel.
Pressure gauge according to its measurement accuracy:
Can be divided into precision pressure gauges, general pressure gauges. The precision level of precision pressure gauges is 0.1, 0.16, 0.25, 0.4 and 0.05. The accuracy levels of general pressure gauges are 1.0, 1.6, 2.5, and 4.0.
Pressure gauge according to its measurement basis:
Pressure gauges are divided into: general pressure gauges, absolute pressure gauges, stainless steel pressure gauges, and differential pressure gauges according to the basis of their indicated pressure. General pressure gauges are based on atmospheric pressure. The absolute pressure gauge is based on the absolute zero pressure. The differential pressure gauge measures the difference between two measured pressures.
Pressure gauge according to its measuring range:
Divided into vacuum gauges, pressure vacuum gauges, micro pressure gauges, low pressure gauges, medium pressure gauges and high pressure gauges.
Vacuum gauges are used to measure pressure values below atmospheric pressure.
Pressure vacuum gauges are used to measure pressure values less than and above atmospheric pressure.
Micro pressure gauges are used to measure pressure values less than 60,000 Pa.
Low pressure meter is used to measure 0 ~ 6MPa pressure value.
Medium pressure gauge is used to measure the pressure value of 10 ~ 60MPa.
High pressure gauge is used to measure pressure value above 100MPa.
Pressure gauge according to its display mode: Divided into pointer pressure gauge. Digital pressure gauge.
The pressure gauge is divided according to its use function: Pressure gauges can be divided into local indication pressure gauges and charged signal control pressure gauges according to their different functions.
General pressure gauges, vacuum pressure gauges, shock-resistant pressure gauges, stainless steel pressure gauges, etc. are all in-situ indicating pressure gauges. They have no other control functions except the indicated pressure.
The output signals of the pressure signal-controlled pressure gauge mainly include:
1. Switching signal (such as electric contact pressure gauge) 2. Resistance signal (such as resistance remote pressure gauge) 3. Current signals (such as inductive pressure transmitters, remote pressure gauges, pressure transmitters, etc.)
According to the purpose of the pressure gauge:
It can be divided into: ordinary pressure gauge, ammonia pressure gauge, oxygen pressure gauge, electric contact pressure gauge, remote transmission pressure gauge, vibration resistance pressure gauge, pressure gauge with inspection pointer, double needle double tube or double needle single tube pressure gauge, digital display Pressure gauges. Digital precision pressure gauges.
Pressure sensors are mainly divided into two types: semiconductor piezoresistive type and electrostatic capacity type. Below we introduce their principles.
Semiconductor piezoresistance type: The semiconductor piezoelectric impedance diffusion pressure sensor forms a semiconductor deformation pressure on the surface of the sheet. The sheet is deformed by an external force (pressure) to produce a piezoelectric impedance effect. The change in impedance is converted into an electrical signal.
Capacitance type: The electrostatic capacitance type pressure sensor is a capacitor that opposes the fixed pole of glass and the movable pole of silicon to form a capacitance. It converts the change in electrostatic capacity generated by deforming the movable pole by external force (pressure) into an electrical signal.
A pressure sensor (Pressure Transducer) is a device or device that can sense the pressure signal and convert the pressure signal into a usable output electrical signal according to a certain rule.
At present, there are many types of core materials for pressure sensors. The performance of several core materials is briefly introduced below. 1. Single crystal silicon 2. Polysilicon 3. Silicon-Sapphire 4. Compound semiconductor materials 5. SiC thin film material
A diaphragm pressure gauge is a device,
that uses a diaphragm with a known pressure to measure pressure in a fluid.
It has many different uses, such as monitoring the pressure of a canister of gas, measuring atmospheric pressure. Or recording the strength of the vacuum in a vacuum pump.
The diaphragm pressure gauge consists of a circular membrane, made from sheet metal of precise dimensions, which can either be flat or corrugated.
The diaphragm is mechanically connected to the transmission mechanism, which will amplify the small deflections of the diaphragm, and transfer them to the pointer.
Sino-Inst offersFlush diaphragm pressure sensors. A wide variety of Flush diaphragmPressure sensors options are available to you. Such as free samples, paid samples. Sino-Instrument is a globally recognized manufacturer ofFlush diaphragm Pressure sensors, located in China.
Sino-Inst sells through a mature distribution network that reaches all 30 countries worldwide. Flush diaphragmPressure sensors products are most popular in Europe, Southeast Asia, and Mid East. You can ensure product safety by selecting from certified suppliers. With ISO9001, ISO14001 certification.
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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.
Low pressure transducers for air and non-corrosive gases low pressure measurement.
Low pressure transducers also called low pressure transmitters. Sino-Inst offers High-precision low-pressure pressure transducers. 0 ～ 2.5kPa to 0 ～ 30kPa measurable. Low pressure transducer converts the measured pressure into an accurate electrical signal. This process is achieved through a high-performance amplifier circuit. The unique design of this product makes it unique in terms of environmental resistance. It is less affected by temperature changes. Anti-vibration With good long-term stability. Low pressure tranducers are suitable for applicaitons like: Liquid level. Flood warning. Waste water. Clean room. And open channel flow applications.
Sino-Inst offers a variety of low pressure transducers for industrial pressure measurement. If you have any questions, please contact our sales engineers.
Sino-Inst SI-303 series high-precision low-pressure pressure transmitters adopt internationally renowned brand sensors. The measured pressure is converted into accurate electrical signals through high-performance amplifying circuits.
The unique design of this product makes it resistant to environmental influences Unique play. Little affected by temperature change. Vibration resistance and good long-term stability. It is extremely suitable for engineering equipment, factory automation control and other fields.
Features of Low-Pressure Transmitter
SI-303 Low Pressure Transducer
Low range and high dynamic frequency response;
Full stainless steel housing, excellent corrosion performance;
Advanced temperature digital compensation function, wide working temperature range;
Using piezoresistive diffusion silicon chip. The natural frequency is higher than the piezoelectric dynamic pressure sensor (the natural frequency can reach 400kHz);
Good signal-to-noise ratio, high resolution, high signal-to-noise ratio, and strong anti-interference ability;
Small size, light weight, complete type, high cost performance;
Suitable for high-end measurement industries. Such as chemical explosion experiments, hydraulic engineering and aerodynamic experiments;
Developed for low pressure applications in general industry and OEM applications
Flow measurement
Room monitoring
Energy management
HVAC and VAV
Process control
Aerospace
Car, medical equipment
Pipeline system
What is a low-pressure transducer?
Low pressure transducer is pressure transmitter based on piezoresistive pressure sensor. Low pressure transmitters are suitable for air and non-corrosive gases low pressure measurement.
Low pressure transmitters are suitable formeasuring low-level gauge, differential & absolute pressures. Low pressure transmitters with 4 to 20 mA current output, can measure low pressure below 1 bar (15 psi, 400 inWG or 1000 mbar).
Low-pressure transmitters are used to measure air ventilation pressures in buildings. And small pressure differences between two different locations. Such as clean rooms and laboratories where it is important to prevent air contamination.Low pressure ranges are required to measure small pressure values. Often between two locations where the air is being moved from one place to another.
Low range pressure measurement is required for monitoring and controlling ventilation, and air extraction in office and factory buildings. In building management applications, air movement in large spaces creates very small changes in air pressure. So it is necessary to use highly sensitive measurement devices, which are set to read in inches of water column, mbar, hPa or Pascals.
Low pressure pressure transmitters use semiconductor piezoresistive effect and micro-machining technology.
On single crystal silicon wafers, semiconductor processes such as photolithography and diffusion are used to make Wheatstone bridges.
When subjected to external forces, micro-strains are generated. The electric bridge is out of balance. The signal is processed by a high-performance amplifying circuit. Makes the product have the advantages of high accuracy, good repeatability, high reliability, etc.
The circuit and core are all sealed in a stainless steel housing. And a variety of installation interfaces are designed.
For very low pressures, there are other types of transducers available, which are based on other principles. These include Pirani gauge, thermocouple and ionization gauge.
The first two techniques are based on the rate at which heat is loss from a heated filament placed in the low-pressure environment. This heat loss is depended on the number of gas molecules per unit volume.
Pirani gauge – This gauge calculates filament temperature by measuring filament resistance. Resistance measurement is measured with the help of a Wheatstone bridge circuit. The relation between the resistance and the applied pressure is highly non-linear.
thermocouple – In this type of pressure transducer, a thermocouple is attached to the heated filament to measure its temperature. For the reference temperature in the thermocouple, room temperature is used. The voltage output of the thermocouple varies non-linearly with the gas pressure.
Ionization gauge – It is highly useful for measuring very small pressures in the range of 10–3 atm to 10–13 atm. Here, the gas, whose pressure is to be measured, is ionized with the help of a heated filament. The current is measured between two electrodes in the ionized region, which depends on the gas pressure, because the number of ions per unit volume depends on the gas pressure.
Q&A
What is the function of a pressure transducer?
A pressure sensor is a device for pressure measurement of gases or liquids. Pressure is an expression of the force required to stop a fluid from expanding, and is usually stated in terms of force per unit area. A pressure sensor usually acts as a transducer; it generates a signal as a function of the pressure imposed. For the purposes of this article, such a signal is electrical. More about Pressure sensor Wikipedia.
How does a 3 wire pressure transducer work?
Three-wire system: The three-wire sensor is the separation of the positive terminal of the power supply and the positive terminal of the signal output, but they share a COM terminal. Use one wire for the positive end of the power supply and one wire for the positive end of the signal output. The negative end of the power supply and the negative end of the signal share one line. Its power supply is mostly 24v.dc, the output signal is 4-20ma.dc, the load resistance is 250ω or 0-10ma.dc, and the load resistance is 0-1.5kω; some also have ma and mv signals, but the load resistance or input The resistance varies with the form of the output circuit. The designation of a few-wire system was only after the birth of the two-wire transmitter. This is the result of the extensive application of electronic amplifiers in meters. The essence of amplification is an energy conversion process, which is inseparable from power supply. So the first to appear is a four-wire transmitter; that is, two wires are responsible for the power supply, and the other two wires are responsible for outputting the amplified signal (such as voltage, current, etc.). How is a 3 wire 4-20mA pressure transmitter connected electrically? Example of Sensor Connections: Volts Input + (Supply positive) Current Output + (Signal positive) Volts Input (negative) / Current Output (Supply negative)
How do you hook up a pressure transducer?
Pressure sensors are generally two-wire, three-wire, four-wire, and some are five-wire. Pressure sensor two-wire system is relatively simple. General customers know how to connect. One line is connected to the positive pole of the power supply. The other line is the signal line connected to the negative pole of the power supply through the instrument. This is the simplest. A wire is added to the wire system. This wire is directly connected to the negative pole of the power supply, which is a bit more troublesome than the two-wire system. The four-wire pressure sensor must have two power input terminals and the other two signal output terminals. Most of the four-wire system is a voltage output rather than a 4-20mA output. The 4-20mA is called a pressure transmitter, and most of them are made of two-wire system. Some of the signal output of the pressure sensor is not amplified, and the full-scale output is only tens of millivolts. Some pressure sensors have internal amplification circuits, and the full-scale output is 0 ~ 2V. As for how to connect the display meter, it depends on the range of the meter. If there is a gear that is compatible with the output signal, you can directly measure it, otherwise you need to add a signal adjustment circuit. The five-wire pressure sensor is not much different from the four-wire system. There are relatively few five-wire sensors on the market.
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.
Sanitary Pressure Transmitter is also called a Hygienic pressure sensor or tri-clamp pressure transmitter. Sanitary Pressure Transmitter is used for food &beverage or pharmaceutical application.
Sanitary Pressure Transmitter, also called tri-clamp pressure transmitter. It is the pressure transducer with the flush diaphragm (flat membrane) as the pressure sensor. Sanitary Pressure Transmitter uses a flat membrane to directly sense the pressure. The sensor interface is available in clamp type, M27 × 2, and flange type.
The sanitary pressure transmitter is designed especially for the requirements of the food and beverage, pharmaceutical and biotechnology industries. It is particularly suitable for the special conditions of CIP/SIP cleaning processes. Such as chemical stability towards cleaning liquids and high temperatures
Sino-Inst offers a variety of Sanitary Pressure Transmitters for industrial pressure measurement. If you have any questions, please contact our sales engineers.
Pressure interface with 316L flat diaphragm structure
Hygienic, anti-fouling
Wide measuring range for absolute pressure, gauge pressure and sealed reference pressure
Good sealing and stable work for a long time
With heat sink, high temperature media application performance
Output signal can be selected, can be customized according to customer requirements
No Liquid Fill Diaphragm, Sanitary Clamp Fitting
The SI-350 sanitary pressure transmitter uses a flat membrane to directly sense the pressure signal. The diffused silicon pressure core acts as a sensitive component. Standard silicone oil is used as the pressure transmission medium.
The measuring end is made of 316L stainless steel and is specially welded and processed. Compact structure, corrosion resistance, vibration resistance, and wide temperature compensation.
SI-350 Sanitary Pressure Transmitter Type prevents fouling, unsanitary and sticky pressure blocking. Due to the pressure felt directly at the exposed end of the threaded diaphragm. It is particularly suitable for pressure measurement of viscous fluids with hygienic requirements in the medical and food industries. Widely used in food, medicine, brewing, and other health industries. And stress tests that can scale the measurement medium.
Specifications of SI-350 Sanitary Pressure Transmitter
SI-10 Liquid pressure sensor Liquid pressure sensor is widely used for pressure measurement of various liquids. Like water or oils. IP68 waterproof.
SI-503K Gas Pressure Sensor Gas pressure sensor for industrial gas pressure monitoring. Pagoda gas nozzle Φ8. Such sensors are also commonly referred to as wind pressure transmitters, exhaust pressure sensors.
SI-702 High Pressure Sensor High pressure sensor is pressure transmitter designed for high pressure measure&control. 0 ～ 40MPa… 600MPa. M20 × 1.5, G1 / 2 (others are customized according to requirements)
SI-702S Ultra-High Pressure Senors Pressure sensor for Ultra high pressure applications. Ultra high pressures up to 15,00MPa. 0-2000MPa to 0-7000MPa (customized).Ball head M20 × 1.5, cone head M20 × 1.5.
Flush diaphragm pressure sensor uses a diaphragm isolation process. Feel the pressure directly with a flat membrane. There is no pressure hole in the test head. There is no clogging of viscous media during the measurement. Adopting flush membrane structure, diffused silicon pressure-sensitive core body, with good moisture resistance and excellent media compatibility. The sensor interface is available in clamp, thread and flange options. The output signal can be selected from voltage, current, and so on. The flush diaphragm of the sensor prevents problems such as scaling, unsanitary and clogging of viscous liquids.
High Temperature Pressure Transducer/Transmitter works for steam and fluid. Temperature: -30 ℃ ～ 160-350 ℃, customized up to 850 ° C. It is possible to fit a stand off pipe, pigtail or other cooling device to reduce the media temperature. If not, High Temperature Pressure Transducer/Transmitter is the best choice. The pressure is transmitted to the sensor through the heat dissipation structure on the transmitter. The high-precision signal processing circuit is located in the stainless steel housing. The sensor output signal is converted to standard output signal, like 4-20mA.
The sino-Inst high-pressure transducer has gone through thousands of fatigue impact tests and several days of low and medium temperature aging cycles before leaving the factory. It has solved the disadvantages of high-pressure sensors in terms of stress and zero instability. Provide customers with reliable products for high voltage measurement. The pressure of the SI-702 series can reach 600MPa. The precision level is high, and the mature production technology can ensure the long-term stability of the sensor with excellent characteristics. SI-702 series pressure sensors are suitable for oil extraction platforms, water flow equipment, high-pressure measurement equipment, hydraulic control systems, test benches, and industrial automation control.
The signal system of 4-20mA and 1-5V output by the pressure transmitter is stipulated by international standards.In the signal circuit, the pressure transmitter is equivalent to a variable resistor. It is connected in series with the power supply, ammeter (indicator), and load resistance (including wire resistance). The function of the pressure transmitter is to change the current in the circuit in the range of 4-20mA by changing its own resistance according to requirements.The pressure acts on the sensor, and the sensitive element deforms. The deformation will cause the resistance or capacitance value to change. And then it will be converted into an analog 4-20mA output by the conversion circuit.
Sanitary Bimetal Thermometers also called the sanitary thermometer, or tri-clamp thermometer.
Sino-Instrument’s Sanitary Bimetal Thermometers are specially designed for direct insertion into sanitary process applications when a standard thermowell is not specified, or the process environment is not exposed to pressure.
Sanitary Flow Meter, also called sanitary turbine flow meter or Hygienic turbine flowmeter.
The Sino-Instrument sanitary turbine flow meter, food grade flow meter, provides accuracy, versatility, and economy, in measuring a wide variety of food, beverage and pharmaceutical products.
All of Sino-Inst pressure transmitters can work with the AMS TREX!
FAQ
What is pressure transmitter how it works?
Pressure Transmitters are sensors with electrical transmission output for remote indication of pressure. Process transmitters differentiate themselves from pressure sensors through their increased range of functionality. They feature integrated displays, offer high measuring accuracies and freely scalable measuring ranges. Communication is via digital signals, and waterproof and explosion-proof certifications are available. Through connection to diaphragm seals, they are suitable for the harshest operating conditions. Ideal for OEMs, process applications, water processing, and industrial pressure applications.
What is the input of the pressure transmitter?
A pressure transmitter is an instrument that converts pressure variables into a standardized output signal that can be transmitted. And there is a given continuous function relationship between the output signal and the pressure variable (usually a linear function). Mainly used for measurement and control of industrial engineering pressure parameters. Differential pressure transmitters are often used for flow measurement. There are two types of pressure transmitters, electric and pneumatic. The electric standardized output signals are mainly 0mA ~ 10mA and 4mA ~ 20mA (or 1V ~ 5V) DC signals.
How do you calibrate a pressure transmitter?
If the transmitter is used for a period of time, it may cause a change in metering performance. There will be zero drift and increased measurement error. Therefore, it is necessary to perform regular calibration. The accuracy of the calibrator used for calibration should be more than 3 times the required calibration accuracy. Use the pressure calibrator to input the standard pressure values of 0%, 25%, 50%, 75%, and 100% of the range to the transmitter in the forward and reverse directions. Check whether the current output signal is within the allowable accuracy range. If it is out of tolerance, it needs to be adjusted. The adjustment method is as follows (4 ~ 20mA output): (1) Input a standard pressure of 4mA with a pressure calibrator. Adjust the ZERO (zero) potentiometer. Make the 4mA current output within the accuracy range. (2) Input a standard pressure of 20mA with a pressure calibrator. Adjust the SPAN (range) potentiometer. Make the 20mA current output within the accuracy range. (3) ZERO and SPAN will contain each other. Repeat steps (1) (2) until the current output of 4mA point and 20mA point meets the accuracy requirements at the same time. Then check whether the current output of the 25%, 50%, 75% range points meets the accuracy requirements. The transmitter is qualified if it meets the requirements.
What are the types of pressure transmitters?
There are different types of pressure transducers based on their design. These sensors can come in several shapes and sizes, but the technology inside can also differ. There 4 main types of pressure sensors based on this: Strain Gauge Pressure Transducers Capacitance Pressure Transducers Potentiometric Pressure Transducers Resonant Wire Pressure Transducers More about Industrial Pressure Sensors
Sino-Instrument offers over 10 Sanitary Pressure Transmitters.
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 transmitters convert pressure signal into 4 ～ 20mA DC, 0-5V, 0-10V signal output.
The signal system of 4-20mA and 1-5V output by the pressure transmitter is stipulated by international standards.In the signal circuit, the pressure transmitter is equivalent to a variable resistor. It is connected in series with the power supply, ammeter (indicator), and load resistance (including wire resistance). The function of the pressure transmitter is to change the current in the circuit in the range of 4-20mA by changing its own resistance according to requirements.The pressure acts on the sensor, and the sensitive element deforms. The deformation will cause the resistance or capacitance value to change. And then it will be converted into an analog 4-20mA output by the conversion circuit.
Sino-Inst offers a variety of 4-20mA pressure senors for industrial pressure measurement. If you have any questions, please contact our sales engineers.
The SI-300 4-20mA/Voltage Pressure Transducer, also called pressure transmitter 4-20mA. It is a pressure sensor with 4-20ma/Voltage output.
4-20mA Pressure Transducer can be OEM as differential pressure, explosion-proof, or sanitary, just as you need.Ideal for OEMs, process applications, water processing, and industrial pressure applications.
Features of SI-300 Pressure Transducer 4-20mA/Voltage
The 4-20 mA current loop is a process control signal commonly used in many industries.
This is an ideal method for transmitting process information. Because the current does not change when it flows from the transmitter to the receiver. It is also simpler and cost-effective. However, the number of voltage drops and process variables that need to be monitored can affect their cost and complexity.
By understanding these basics, you will be able to make more informed decisions about process control in your facility. This may affect your bottom line.
In order to understand what a 4-20 mA direct current (DC) loop is and how it works, we need to understand some math. Don’t worry we won’t study any advanced electrical engineering formulas.
In fact, the formula we need is relatively simple:
V = I x R This is Ohm’s law.
This means that the voltage (V) is equal to the current (I) times the resistance (R) (“I” stands for Intensitéde Courant, French for Current Intensity).
This is the basic equation in electrical engineering.
Consider the simple DC circuit above, which consists of one power supply and three loads.
The current loop requires voltage to drive the current. This is powered by the {PART 1} 12 power supply, which is labeled Vtot. Current then flows through the loop through each load. The voltage drop of each load can be calculated according to Ohm’s law.
The voltage drop V1 across R1 is:
Each element in the loop provides a voltage or has a voltage drop. However, currently, everything is the same in the loop.
This is the key principle of the 4-20 mA loop. The current is the same everywhere in the entire circuit.
It may be difficult to understand why the current stays constant, so compare your home’s water supply system.
There is a certain pressure in the water pipes that pushes the water towards the house. Voltage acts in a similar manner as pressure, pushing current through the circuit.
When the faucet in your home is turned on, the water runs down. The flow of water is similar to the flow of electrons or electricity. The ability of pressure to force water through a pipe is limited by the bending and restraint of the pipe. These limits limit the flow in the pipeline, similar to how resistors limit current.
Even if the pressure and voltage drop at various points, the flow through the pipeline and the current through the wires remain constant throughout the system.
This is why the use of current as a method of transmitting process information is so reliable.
The reason for using a current signal is that it is less susceptible to interference. And the internal resistance of the current source is infinite. The wire resistance is connected in series in the loop without affecting the accuracy. And it can be transmitted over ordinary twisted pairs for hundreds of meters.
Due to explosion protection requirements, the upper limit is 20 mA: the spark energy caused by a current interruption of 20 mA is not sufficient to ignite the gas.
The reason why the lower limit is not set to 0mA is to detect a disconnection. During normal operation, the value will not be lower than 4mA. And when the transmission line is disconnected due to a fault, the loop current will drop to 0.
Usually, 20mA is used as the disconnection alarm value. There are two more reasons. One reason is to avoid interference. Another reason is that the two-wire system uses 4-20 mA of current. That is, the two wires are the signal line and the power line. The 4 mA is used to provide the quiescent operating current of the circuit for the sensor.
First of all, the parameters that must be seen when purchasing a pressure transmitter are: Pressure range. Range. Measurement medium. Installation method-threaded flange clamps, etc. Installation dimensions. Temperature. Whether with display. Whether with HART protocol. Output type. Current output or voltage output. Explosion-proof level, protection level. Accessories. Mounting bracket. The above parameters will affect the price of the pressure transmitter. Sino-Inst, as the manufacturer of pressure transmitter, offer you with the best price.
Q&A
What does a pressure transducer do?
A pressure transducer is a device or device that can sense the pressure signal and convert the pressure signal into a usable output electrical signal according to a certain rule. A pressure transducer 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 transducer is the most commonly used sensor in industrial practice. It is widely used in various industrial automatic control environments, including water conservancy and hydropower, railway transportation, intelligent buildings, production automatic control, aerospace, military, petrochemical, oil wells, electricity, ships, machine tools , Pipelines and many other industries.
How do you test a 4 20ma pressure transducer?
Pressure transducer is a commonly used pressure instrument, which has certain applications in many industries. When a user detects a pressure transducer, the detection items are different depending on the purpose. Of course, the detection methods will be different. I will introduce 3 common methods for pressure transducer detection, and I hope it can help everyone. 1. Pressure test. The detection method is: power the sensor. Use your mouth to blow the air holes of the pressure sensor. Use the multimeter’s voltage range to detect the voltage change at the output of the sensor. If the relative sensitivity of the pressure sensor is large, this amount of change will be significant. If nothing has changed, you need to use a pneumatic source instead. Through the above methods, the condition of a sensor can be basically detected. If accurate testing is required, a standard pressure source is required. Apply pressure to the sensor and calibrate the sensor according to the pressure and the change of the output signal. When conditions permit, temperature detection of relevant parameters is performed. 2. Detection of zero point. Use the multimeter’s voltage range. Detects the zero output of the sensor without applying pressure. This output is typically a mV level voltage. If it exceeds the sensor specifications. It means that the zero deviation of the sensor is out of range. 3. Detection of bridges. The main test circuit of the sensor is correct. It is generally a Wheatstone full-bridge circuit, which uses the ohm range of a multimeter to measure the impedance between the input terminals and the impedance between the output terminals. These two impedances are the input and output impedances of the pressure sensor. If the impedance is infinite, the bridge is disconnected. It indicates that there is a problem with the sensor or the definition of the pins is not judged correctly.
What is a low pressure transducer?
Low pressure transducers for air and non-corrosive gases low pressure measurement. Low pressure transducers also called low pressure transmitters. Sino-Inst offers High-precision low-pressure pressure transducers. 0 ～ 2.5kPa to 0 ～ 30kPa measurable. Low pressure transducer converts the measured pressure into an accurate electrical signal. This process is achieved through a high-performance amplifier circuit. The unique design of this product makes it unique in terms of environmental resistance. It is less affected by temperature changes. Anti-vibration With good long-term stability. Low pressure tranducers are suitable for applicaitons like: Liquid level. Flood warning. Waste water. Clean room. And open channel flow applications. More about low pressure transducer.
What is the difference between transmitter and transducer?
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. In a pressure transducer, a thin-film or piezo-resistive pressure sensor is mounted on a process connection. The transducer converts pressure into an analog electronic output signal, typically as a millivolt per volt output. These signals are not linearized or temperature compensated. A pressure transmitter has additional circuitry that linearizes, compensates, and amplifies the signal from a transducer. The different signal types are typically voltage signals (eg, 0 to 5 or 0 to 10 volts), milliamp (eg, 4 to 20 milliamp), or digital. The instrument then can transmit the signal to a remote receiver.
Sino-Instrument offers over 50 pressure transducers 4-20mA/Voltage.
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.
Industrial pressure transducers are essential devices in various industrial processes. They are designed to convert a liquid or gas(air) pressure into an electrical signal, which can be used to measure or control different industrial applications. SI-390 General Precision Industrial help improve the efficiency and reliability of various industrial processes. Support OEM.
Pressure transducer/transmitter is a device that converts pressure into pneumatic signal or electric signal for control and remote transmission.
It can convert the gas, liquid and other physical pressure parameters felt by the load cell sensor into a standard electrical signal (such as 4-20mADC, etc.). Use secondary instruments such as indicator alarms, recorders, and regulators for measurement, indication, and process adjustment.
The piezoresistive pressure transmitter uses an advanced micromechanical etching process. By diffusing four high-precision resistors with temperature compensation on the silicon wafer. Form a Wheatstone bridge. Due to the piezoresistive effect, the resistance values of the four bridge arm resistors change. The bridge is out of balance. The sensitive element outputs an electrical signal corresponding to a pressure change. The output electrical signal is amplified by the compensation of the non-linear correction circuit to generate a voltage and current signal that has a linear correspondence with the input pressure.
It uses a programmable KELLER-ASIC chip called a “programmable resistor.” The “programmable resistance” chip allows the transmitter to be installed and calibrated with automatic test equipment to improve product quality and reduce costs.
The transmitter uses 6SC series bellows. The piezoresistive silicon pressure sensor is housed in an oil-filled capsule. The dielectric voltage is isolated by the stainless steel diaphragm and transmitted to the wafer through the oil-filled liquid.The sealed pressure gauge has a TAB (Automatically Insulated Tape) sensor. The sensor floats freely in oil to ensure stability and durability.The “programmable resistor” line has a network of programmable resistors. The network adjusts the zero / gain and temperature coefficients.
All SI-390 series transmitters undergo pressure and temperature cycle compensation test procedures. At the end of the compensation test, various parameters are automatically calibrated. And adjusted by computer-controlled test equipment. A final inspection is then carried out and results are obtained. Check if it is correct. The adjustment position is correct and meets the requirements.
The transmitter is very reliable and economical. It is suitable for process control and pressure measurement in petroleum, chemical, metallurgy, power, light industry, textile, building materials, hydrogeology, food, medicine, environmental control, papermaking, and other industries.
SI-390 Industrial Pressure Transmitter is used for process control in the petrochemical, chemical and HVAC industries. They allow measurement results to be transmitted to the control center.The compact, rugged design makes these instruments suitable for a variety of applications. Including hydraulic and pneumatic, vacuum, test equipment. Level measurement, pressure control, compressor control, pump protection and many other processing and control operations. A wide range of electrical and process connection options can meet almost all requirements.
These types of transducers are also known as pressure transmitters.
Since a 4-20mA signal is least affected by electrical noise and resistance in the signal wires, these transducers are best used when the signal must be transmitted long distances.
It is not uncommon to use these transducers in applications where the lead wire must be 1000 feet or more.
How to choose the right industrial pressure transducer?
Pressure transmitters are pressure sensors whose electronics can generate measurement signals. The signal can be remotely transmitted via cables, buses or radio frequency.
Consider the unit’s measurement range and maximum pressure capacity, it’s precision, its operational environment (temperatures, vibrations, etc.), the nature of the measured medium and the type of output signal.
1. In order to ensure the stable operation of the product,
it is recommended to consider the actual pressure value,
and the range of possible migration when selecting the measurement range.
The maximum pressure should be within the measurement range,
and the company will complete the migration before leaving the factory.
2. The product is installed vertically on the field pressure interface, and the display level is facing the observer.
3. For transmitters with zero pressure and negative pressure, please indicate the range of the range in the order.
4. Intrinsically safe explosion-proof products are limited to products with a pointer head.
5. Qiping diaphragm type transmitter measurement range is 0 ~ 70kPa … 35MPa.
6. When M3 is selected, the ambient temperature range of the transmitter is -20~60°C;
when M4 is selected, the ambient temperature range of the transmitter is -30~70°C.
Want to know more about pressure transmitter?
This video gives you the answers to your basic questions about pressure and pressure transmitters.
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According to the working principle: it can be divided into capacitive, piezoresistive, resonant, etc. (resonant pressure transmitters can directly output digital pulse signals without going through the signal processing circuit);
According to the wiring method: it can be divided into a two-wire system, a three-wire system (one positive power line. Two signal lines, one of which is GND), a four-wire system (two positive and negative power lines, two signal lines, among them One GND), etc.;
According to the output mode: it can be divided into a voltage output, current output, digital signal output, etc.;
According to the pressure measurement range: it can be divided into general pressure transmitter (0.001～35MPa), micro pressure transmitter (0～1.5kPa), negative pressure transmitter (0～-100kPa), etc.;
According to accuracy: can be divided into high accuracy transmitter (0.1% or 0.075% level) and general transmitter (0.5% level);
Pressure transmitters are widely used. Typical examples are constant pressure water supply, pipeline monitoring, hydraulic systems, automated testing, etc. Used for air pressure, hydraulic, oil pressure testing. There are many users who cooperate with us. We The engineers have accumulated rich field experience.
These are wireless pressure transmitters,pressure transmitter with display, and waterpressure transmitter. A wide variety of Industrial Pressure Transducer options are available to you, such as free samples, paid samples.
The top applying countries are China (Mainland), Hong Kong, and the United States, which supply 96%, 2%, and 1% of wireless pressure transmitter respectively.
Industrial Pressure Transmitter products are most popular in North America, Domestic Market, and South America.
Sino-Inst is a company that designs and manufactures OEM pressure transducers and transmitters featuring various pressure sensor technologies to tailor designs to individual applications.
Our Indutrial pressure transducers are available in various pressure ranges with customized and electrical or pressure connections, as well as analogue and digital interfaces. Contact us today for a standard product quotation or to discuss a custom solution. Contact Sino-Inst for a standard product quotation or to discuss a custom OEM solution.
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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.
Liquid pressure sensor is widely used for pressure measurement of various liquids. Like water or oils tank. IP68 waterproof.
Liquid pressure sensors also called a water level pressure sensor, or water pressure transducer. SI-10 liquid pressure sensor uses waterproof device to achieve IP68 waterproof rating. Like: water, oil pressure for pipe or tank. SI-10 liquid pressure sensor is a piezoresistive silicon pressure sensor. The main component of liquid pressure sensor is diffused silicon, with high stability. SI-10 liquid pressure sensor supports analog output, and 4-20mA, HART. For open tank, the liquid pressure sensor is easier to install than the differential pressure level measurement.
Sino-Inst offers a variety of liquid pressure sensors for industrial level measurement. If you have any questions, please contact our sales engineers.
Adopt stainless steel integral components. High precision strain process. After highly reliable amplifier circuit and precise temperature compensation. With stable performance, good EMC electromagnetic compatibility and impact resistance.
National standard 304 stainless steel seal welding. The structure is small and compact. Has good moisture resistance and excellent media compatibility.
Adopt waterproof device to achieve IP68 waterproof rating.
Integrated structure design, electrical part adopts fully sealed waterproof structure.
Can be customized flat membrane waterproof pressure sensor. The diaphragm isolation technology is adopted, and the test head has no pressure hole. There is no clogging of viscous medium during the measurement. It is suitable for pressure measurement and control of viscous media such as chemical coatings, paints, mud, asphalt, crude oil and other harsh environments.
current output type: maximum 800Ω; voltage output type: greater than 50KΩ
Insulation resistance:
greater than 2000MΩ (100VDC)
Response time:
<1mS
Sealing grade:
IP68
Long-term stability:
0.1% FS / year
Vibration effect:
In the mechanical vibration frequency 20Hz ～ 1000Hz, the output change is less than 0.1% FS
Electrical interface:
waterproof sealed outlet
Thread connection:
G1 / 4, M20 × 1.5 other threads can be customized.
Applications of SI-10 Liquid pressure transducer
Off-Highway Vehicles
Natural Gas Equipment
Semiconductor Processing
Power Plants
Refrigeration
Robotics
HVAC
How does a water pressure sensor work?
The core of the water pressure sensor is usually diffused silicon. The working principle of the water pressure sensor is that the pressure of the measured water pressure directly acts on the diaphragm of the sensor, so that the diaphragm produces a micro-displacement proportional to the water pressure. As a result, the resistance value of the sensor changes. Use an electronic circuit to detect this change. And convert and output a standard measurement signal corresponding to the pressure.
About the working principle of water pressure sensor, WIKA made a great introduction. Of course, if you need to know more about how the water pressure sensor works, please refer to Wikipedia: Pressure sensor
A pressure sensor may also be used to calculate the level of a fluid. This technique is commonly employed to measure the depth of a submerged body (such as a diver or submarine), or level of contents in a tank (such as in a water tower).
For most practical purposes, fluid level is directly proportional to pressure. In the case of fresh water where the contents are under atmospheric pressure, 1psi = 27.7 inH20 / 1Pa = 9.81 mmH20.
The basic equation for such a measurement is:
where P = pressure, ρ = density of the fluid, g = standard gravity, h = height of fluid column above pressure sensor
If the transmitter is used for a period of time, it may cause a change in metering performance. There will be zero drift, and the measurement error will increase. Therefore, it is necessary to perform regular calibration.
The accuracy of the calibrator used for calibration should be more than 3 times the required calibration accuracy.
Use the pressure calibrator to input the standard pressure values of 0%, 25%, 50%, 75%, and 100% of the range to the transmitter in the forward and reverse directions.
Check whether the current output signal is within the allowable accuracy range. If it is out of tolerance, it needs to be adjusted.
The adjustment method is as follows (4 ~ 20mA output):
(1) Input a standard pressure of 4mA with a pressure calibrator. Adjust the ZERO (zero) potentiometer. Make the 4mA current output within the accuracy range; (2) Input a standard pressure of 20mA with a pressure calibrator. Adjust the SPAN (range) potentiometer. Make the 20mA current output within the accuracy range; (3) ZERO and SPAN will contain each other. Repeat steps (1) (2) until the current output of 4mA point and 20mA point meets the accuracy requirements at the same time. Then check whether the current output of 25%, 50% and 75% range points meet the accuracy requirements. The transmitter is qualified if it meets the requirements.
Differental pressure liquid level sensor
SMT3151LT differential pressure level transmitter is usually used to measure the liquid level in a closed container. The differential pressure level transmitter uses the differential pressure generated by the gravity of the liquid to measure the liquid level in the container.
The high-pressure side measuring tube is always filled with water due to steam condensation, keeping the pressure constant. The low-pressure side measuring tube forms a communication device with the container. The pressure changes with the liquid level in the container.
Sino-Inst offers overs 100 DP transmitters, for liquid level, pressure measurement. Our differential pressure (dp) level transmitters suit to measeure water and other liquid level.
A wide variety of DP level transmitters are available to you, such as SMT3151LT Differential pressure level transmitter.
Water pressure sensors are usually used to measure the water level in the water tank or the rate of change of the water level. The sensor is mounted on top of an open tube submerged in the container.
As the water level rises, the air above the water in the tube is compressed, which increases the pressure on the sensor. An analog-to-digital converter (ADC) is used to convert the signal from the sensor to a digital value.
They can also be used to measure the pressure in running water pipes (for example, in a water supply system). It automatically determines whether it is necessary to start the pump to increase the flow rate.
They can be used to measure the depth of submerged objects. For example, in deep sea diving.
Of course, we can also calculate the liquid level based on water pressure. Or you can directly refer to our static pressure level transmitter.
Q & A
How does pressure sensor work?
What is the working principle of a pressure sensor? A pressure sensor works by converting pressure into an analog electrical signal. The demand for pressure measuring instruments increased during the steam age. When pressure sensing technologies were first manufactured, they were mechanical and used Bourdon tube gauges to move a needle, and give a visual indication of pressure. Nowadays we measure pressure electronically using pressure transducers and pressure switches.
What is a capacitive pressure sensor?
Capacitive pressure sensors typically use a thin diaphragm, as one plate of a capacitor. The applied pressure causes the diaphragm to deflect and the capacitance to change. You may like: Diaphragm Seal Pressure/ Differential Pressure Transmitters This change may or may not be linear, and is typically on the order of several picofarads out of a total capacitance of 50-100 pF. The change in capacitance may be used to control the frequency of an oscillator or to vary the coupling of an AC signal through a network. The electronics for signal conditioning should be located close to the sensing element, to prevent errors due to stray capacitance. Read more about Capacitive pressure transducer [What is & How does it work]
What are the various types of sensors used to measure pressure?
Pressure measurements can be taken to determine a range of different values, depending on whether the pressure is relative to the atmosphere, vacuum conditions, or other measuring factors. Pressure sensors are instruments that can be designed and configured to detect pressure across these variables.
Absolute pressure sensors are intended to measure pressure relative to a vacuum, and they are designed with a reference vacuum enclosed within the sensor itself. These sensors can also measure atmospheric pressure. Similarly, a gauge pressure sensor detects values relative to atmospheric pressure, and part of the device is usually exposed to ambient conditions. This device may be employed for blood pressure measurements. For more information on the differences between the gauge and absolute pressure. More about: Absolute Pressure Vs Gauge Pressure.
How to take off a high pressure sensor on thr liquid line?
Generally, the pressure sensor is installed behind the pressure valve. When you need to remove the pressure sensor, simply close the pressure valve. When purchasing a pressure transmitter, the manufacturer will recommend configuring a valve block. Or according to the measurement situation, install the pressure guiding tube. This can facilitate the installation and disassembly of the pressure transmitter, while ensuring continuous flow of the pipeline.
How do you test a pressure sensor?
There are 3 commonly used detection methods for pressure sensors. Hope it can help you. 1. Pressure test. The method of detection is to power the sensor. Use your mouth to blow the air hole of the pressure sensor. Use the voltage file of a multimeter to detect the voltage change at the output 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 need to use a pneumatic source to apply pressure. Through the above method, you can basically detect the condition of a sensor. If accurate testing is required, a standard pressure source is required. Give pressure to the sensor, and calibrate the sensor according to the pressure and the change of the output signal. And when conditions permit, the temperature detection of relevant parameters. 2. Zero point detection. Use the voltage range of the multimeter to detect the zero output of the sensor under no pressure. This output is generally a voltage of mV level. If it exceeds the technical specifications of the sensor, it means that the zero deviation of the sensor is out of range. 3. Detection of bridges. It mainly detects whether the circuit of the sensor is correct. It is generally a Wheatstone full-bridge circuit. Use the ohm file of the multimeter. Measure the impedance between the input terminals and the impedance between the output terminals. These two impedances are the input and output impedances of the pressure sensor. If the impedance is infinite, the bridge is disconnected. It means there is a problem with the sensor or the definition of the pin is not correct.
What is the difference between pressure switch and pressure transmitter?
Pressure Switch: When the pressure in the system is higher or lower than the rated safety pressure. The disc in the sensor moves instantaneously. Push the switch connector on or off by connecting the guide rod. When the pressure drops or rises to the rated recovery value, the disc resets instantly. The switch automatically resets. Or simply put, when the measured pressure exceeds the rated value, the free end of the elastic element is displaced. Push the switching element directly or after comparison. Change the on-off status of the switching element. To achieve the purpose of controlling the measured pressure. The elastic elements used in the pressure switch include single-turn spring tube, diaphragm, diaphragm box and bellows. Pressure Transmitter: When the pressure signal acts on the sensor. The pressure sensor converts the pressure signal into an electrical signal. Amplified by differential amplifier and output amplifier. Finally, the V / A voltage and current are converted into a 4-20mA standard current output signal in linear correspondence with the measured medium (liquid) level pressure.
Special products include micro-sized, ultra-micro-sized high-pressure high-temperature and flushing diaphragm models. To fit the space with narrow gaps.
Sino-Inst provides pressure and differential pressure sensors based on silicon or foil-based strain gauge technology. Very suitable for many types of applications in automotive, aerospace, chemical, semiconductor manufacturing and general industry.
All our pressure products are highly configurable. Can meet the unique requirements and environment of customers. On some pressure sensor models, intrinsically safe and explosion-proof options for use in hazardous locations are provided.
If you need special modifications or complete custom designs to meet your unique requirements, please feel free to contact us.
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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.
Digital Pressure Sensor is particularly suitable for use in computer control systems.
Digital pressure sensors measure the relative pressure of hydraulic and pneumatic systems. Pressure transmitters provide absolute or differential analog readings over a wide measurement range. SI-520 Digital Pressure Sensor passes high-reliability digital circuit 485 and precision temperature compensation. RS485 half-duplex working mode. This protocol complies with the MODBUS communication protocol. And uses a subset of RMOD methods in the MODBUS protocol. Digital Pressure Sensor adopts 304ss seal and welding, and has compact structure. Digital Pressure Sensor has good moisture resistance and excellent media compatibility.
Sino-Inst offers a variety of low pressure transducers for industrial pressure measurement. If you have any questions, please contact our sales engineers.
Such sensors are also commonly referred to as:RS485 pressure transmitter. MODBUS protocol transmitter. RS485 bus sensor. Digital signal pressure transmitter.
The digital pressure sensor is a new type of RS485 digital output sensor. Compared with the transmitters that generally output analog signals on the market, it is more suitable for the signal acquisition of the majority of industrial automation users.
RS485 digital sensor has broad development prospects. It is widely used in various industrial automation environments. It involves oil pipelines, water conservancy and hydropower, railway transportation, intelligent buildings, production automation, aerospace, military industry, petrochemicals, oil wells, electricity, ships, machine tools, hydraulic machinery and many other industries.
The working principle of the digital pressure sensor is that the pressure acts directly on the diaphragm of the sensor, so that the diaphragm produces a micro-displacement proportional to the pressure of the medium. The resistance of the sensor changes, and the electronic circuit is used to detect this change. And convert the output A digital standard signal corresponding to this pressure.
What does 485 communication (modbus protocol) mean in a pressure transmitter?
The pressure transmitter has a common 4-20mA output and has Hart protocol. There is also 485 communication which is the modbus protocol. Today we will talk about what is 485 communication.
MCU pin outputs TTL level. TTL level means when the MCU pin outputs 0 level. In general, the voltage is 0V. When the MCU pin outputs 1 level, the voltage is 5V. Because the TTL level is generated by a signal line and a ground line. The interference signal on the signal line will be transmitted to the receiving end with the effective signal, so that the effective signal is interfered. 485 communication actually converts the TTL level from the MCU through a converter chip in the hardware layer.
485 communication features:
RS-485 electrical characteristics:
Logic “1” is represented by the voltage difference between the two lines being + (2-6) V. Logic “0” is represented by the voltage difference between the two lines being-(2-6) V. The interface signal level is lower than that of RS-232-C, so it is not easy to damage the chip of the interface circuit. And this level is compatible with TTL level, which can be easily connected to TTL circuits.
The maximum data transmission rate of RS-485 is 10Mbps.
The RS-485 interface is strong, which means it has good anti-noise interference.
The standard value of the maximum transmission distance of the RS-485 interface is 4000 feet, in fact it can reach 3000 meters (theoretical data, in actual operation, the limit distance is only about 1200 meters). In addition, the RS-232-C interface allows only one transceiver to be connected on the bus, that is, a single station capability. The RS-485 interface allows up to 128 transceivers on the bus. That is to say, it has multi-station capability, so that users can easily set up a device network using a single RS-485 interface.
RS485 disadvantages:
RS485 bus is a conventional communication bus. It cannot do automatic arbitration of the bus. That is, data cannot be sent simultaneously to avoid bus contention. Therefore, the communication efficiency of the entire system is necessarily low, and the amount of data redundancy is large. RS485 bus is not suitable for application places with high speed requirements. At the same time, because there is usually only one host on the RS485 bus, this bus method is a typical centralized-decentralized control system. Once the host fails, the communication of the entire system is limited to a paralyzed state. Therefore, it is an important measure to do online backup of the host.
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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. More: Industrial Pressure Sensors
A gauge pressure (GP) transmitter, compares a process pressure against local ambient air pressure.
Gauge pressure transmitters have ports to sample the ambient air pressure in real-time. Today’s highly accurate gauge pressure transmitters can be affected by fluctuations in the local ambient pressure. Measurements above the ambient air pressure are represented, as a positive number, while a negative number represents measurements below ambient. A gauge pressure measurement is indicated by the letter ‘g’ following the unit of measure of the reading (i.e., inH₂O(g) or psig). More: Gauge Pressure Transmitter
Pressure sensor is a commonly used pressure instrument, which has certain applications in many industries. It is very important for the user to determine how to detect the pressure sensor when using the pressure sensor. According to the purpose of detecting the pressure sensor, the detection items are different, of course, the detection methods will be different. Today, I will mainly introduce the three detection methods commonly used by pressure sensors. I hope they can help everyone. Pressurization test. The checklist method is to supply power to the sensor. Blow the air holes of the pressure sensor with your mouth. Use the voltage range of the multimeter to detect the voltage change at the output of the sensor. If the relative sensitivity of the pressure sensor is large, this amount of change will be significant. If nothing has changed, you need to use a pneumatic source instead.
Through the above methods, the condition of a sensor can be basically detected. If you need accurate detection, you need to use a standard pressure source to pressure the sensor. Calibrate the sensor according to the pressure and the amount of change in the output signal. When conditions permit, temperature detection of relevant parameters is performed. Detection of zero point. Use the voltage range of the multimeter to detect the zero point output of the sensor when no pressure is applied. This output is generally a mV level voltage. If it exceeds the sensor’s technical indicators, it means that the zero deviation of the sensor is out of range. The detection of the bridge circuit. The main test circuit of the sensor is correct. Generally, it is a Wheatstone full bridge circuit. The ohm range of the multimeter is used. The impedance between the input terminal and the impedance between the output terminal. These two impedances It is the input and output impedance of the pressure sensor. If the impedance is infinite, the bridge is disconnected, indicating that there is a problem with the sensor or that the pin definition is not judged correctly. Extended reading: What is a pressure sensor?
The working principle of the digital pressure sensor is that the pressure directly acts on the diaphragm of the sensor. The diaphragm generates a micro-displacement that is proportional to the pressure of the medium. The resistance of the sensor changes. This change is detected by electronic circuits. The output is converted to correspond to this Digital standard signal of pressure. More about: How does a pressure transmitter work?
There are different types of pressure transducers based on their design.
These sensors can come in several shapes and sizes, but the technology inside can also differ.
There 4 main types of pressure sensor based on this:
In fact, the pressure sensor can do both digital and analog signal output. When you order a pressure sensor, you need to confirm with the manufacturer: Do you need a local digital display? What kind of signal output is required, etc. General pressure sensors support 4-20mA, 0-5V, 0-10V and other signal outputs. Or RS485, HART and other protocols.
Digital pressure switches are mainly based on electronic pressure transmitters. This provides the switch with the complete functionality of a transmitter. Simple control tasks can be performed using the integrated pressure switch. The switching points can be set individually using the digital display or an I/O link.
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. More: Industrial Pressure Sensors
A gauge pressure (GP) transmitter, compares a process pressure against local ambient air pressure. Gauge pressure transmitters have ports to sample the ambient air pressure in real-time. Today’s highly accurate gauge pressure transmitters can be affected by fluctuations in the local ambient pressure. Measurements above the ambient air pressure are represented, as a positive number, while a negative number represents measurements below ambient. A gauge pressure measurement is indicated by the letter ‘g’ following the unit of measure of the reading (i.e., inH₂O(g) or psig). More: Gauge Pressure Transmitter
Sino-Instoffers over 20 Digital Pressure Sensors. A wide variety of Digital Pressure Sensors options are available to you. Such as free samples, paid samples. Sino-Inst is a globally recognized manufacturer of Digital Pressure Sensors, located in China.
Sino-Inst sells through a mature distribution network that reaches all 30 countries worldwide. Digital Pressure Sensors products are most popular in Europe, Southeast Asia, and Mid East. You can ensure product safety by selecting from certified suppliers. With ISO9001, ISO14001 certification.
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.
OEM pressure sensors from Chinese manufacturer. Silicone filled. Protected by stainless steel diaphragm. Suitable for a variety of fluid media.
OEM Pressure Sensor is an economical product for users. SI-302 pressure sensor for OEM applications. The core of this series pressure sensor adopts strain gauge technology. And the elastic element is 17-4PH stainless steel. Specially designed for customer OEM processing. Mass production. Low cost, impact resistance, fatigue resistance. It is mainly used in many situations that require economical stress testing. Professional economic products for OEM users. For pressure measurement of weakly corrosive liquids, gases and vapors.
Sino-Inst offers a variety of OEM pressure senors for industrial pressure measurement. If you have any questions, please contact our sales engineers.
Piezoelectric effect is the main working principle of piezoelectric sensors. Piezoelectric sensors cannot be used for static measurement. Because the charge after external force is applied, it can only be saved when the loop has infinite input impedance. This is not the case, so this determines that piezoelectric sensors can only measure dynamic stress.
Ceramic pressure sensor:
Ceramic pressure sensors are based on the piezoresistive effect. Pressure directly acts on the front surface of the ceramic diaphragm, causing the membrane to deform slightly. Thick film resistors are printed on the back of the ceramic diaphragm and connected into a Wheatstone bridge. Because of the varistor The piezoresistive effect makes the bridge generate a voltage signal that is highly linear and proportional to the pressure and proportional to the excitation voltage. The standard signal is calibrated to 2.0 / 3.0 / 3.3mv / v according to different pressure ranges. Strain sensors are compatible.
Diffused silicon pressure sensor:
The working principle of a diffused silicon pressure sensor is also based on the piezoresistive effect. Using the piezoresistive effect principle, the pressure of the measured medium directly acts on the diaphragm of the sensor (stainless steel or ceramic). The diaphragm produces a micro-displacement proportional to the pressure of the medium. Change the resistance value of the sensor. Use electronic circuits to detect this change, and convert and output a standard measurement signal corresponding to this pressure.
Sapphire pressure sensor:
Utilizing strain-resistance working principle. Using silicon-sapphire as the semiconductor sensitive element has unparalleled metrological characteristics. Therefore, silicon-sapphire semiconductor sensitive components are used. They are not sensitive to temperature changes and have good working characteristics even under high temperature conditions. Sapphire has extremely strong radiation resistance. In addition, silicon-sapphire semiconductor sensitive components, pn drift.
Piezoresistive force sensor:
Resistance strain gage is one of the main components of a piezoresistive strain sensor. The working principle of a metal resistance strain gage is that the resistance of the strain resistance absorbed by the base material changes with the mechanical deformation.
Individual designs of OEM pressure transmitters
A wide range of designs in the area of process connections,
and mechanical connections to the case is already available.
On request,
further customizations can be developed to meet customer demands to the full extent.
Applications of OEM pressure sensor
Applications
Industrial process control: liquid level measurement, gas, liquid pressure measurement;
Pressure testing instruments: pressure calibration instruments, hydraulic systems and switches; refrigeration equipment and air conditioning systems, aviation and marine testing.
oem pressure transmitter
OEM pressure transmitter manufacturer in China
Sino-Instrument is the Best Chinese independent manufacturer, of media-isolated, piezoresistive pressure sensors, producing in excess of 3 thousand units every year.
Sino-Instrument sensors are produced in three basic configurations:
Each of these types benefits from over 30 years of continuous development in our ISO9000:
2001-accredited headquarters.
Optimized mechanical packaging ensures effective media isolation without degrading performance.
A large percentage of OEM sensors produced by Sino-Instrument, are used in our own pressure transducers, and pressure transmitters, so Sino-Instrument understands the OEM viewpoint.
Sino-Instrument’s designs cover a broad spectrum of applications, from medical vascular intervention systems to downhole oil tools.
Whatever the need, Sino-Instrumenr can provide the solution!
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.
Silicon Pressure Sensors use the piezoresistive effect of semiconductor silicon material itself and integrated circuit technology.
After the semiconductor silicon material is subjected to pressure or tension, its resistivity will change. Then, through the integrated circuit or the signal conditioning conversion circuit, the electrical signal proportional to the change of the corresponding pulling force or pressure can be output.
Silicon Pressure Sensors are widely used in the measurement of physical quantities such as tension, pressure and pressure difference. It can also be used in liquid level, weight, strain, speed, vacuum, flow detection, etc.
Silicon pressure sensor, also known as Diffused silicon pressure sensor. Piezoresistive diffusion silicon pressure transmitter, Silicon pressure transducer, also are this pressure sensors. Silicon pressure sensors are low cost. Silicon pressure sensors can work for pressure and differential pressure measurement. Sino-Inst can offer you with optical, according to your requirements. Silicon pressure sensors can work for water, air, gas, vacuum measurement.
General strain gauge sensor output is only about 10mV. The full-scale output of the diffused silicon sensor is about 100mV. The influence of factors such as interference and noise is relatively small. The cost of the amplifying circuit is also reduced accordingly. Resolution is greatly improved. No dead zone near zero pressure. At present, the minimum size of the diffusion silicon pressure core is 10mm in diameter.
High precision and good repeatability.
Diffusion silicon piezoresistive pressure sensor realizes pressure sensing, pressure transmission, and force-electric conversion on the same element. No intermediate conversion links. No pressure lag. Mechanical displacement deformation. Guaranteed minimal repeatability and hysteresis errors, and good linearity. No creep, stable, reliable and long life. Sino-Inst offers 0.1% accuracy, 0.25% accuracy and 0.5% accuracy silicon pressure transmitters.
Good temperature characteristics
Due to the use of advanced technologies such as laser resistance adjustment, computer compensation and ingenious control of the diffusion concentration, the full-scale temperature drift (sensitivity temperature coefficient) is self-compensated. The temperature compensation range is generally -10-60 °C. It overcomes the large temperature coefficient of the semiconductor wafer itself. The defects of the diffusion silicon pressure transmitter control the zero position and full scale temperature drift to a smaller range, and widen the use temperature range.
Suitable for applications in dangerous and explosive fields and places
Diffusion silicon pressure transmitter has the characteristics of low current, low voltage and low power consumption. It is an intrinsically safe explosion-proof product.
High reliability and anti-interference performance
The diffusion silicon pressure transmitter adopts a series of protection measures such as stainless steel material and special protective structure, and a series of protection measures such as lightning strike, anti-interference, anti-overvoltage, and overcurrent of the amplifier circuit. It improves the reliable sealing, anti-corrosion and anti-harsh work. Environmental capability. Fully suitable for general industrial field measurement and control needs.
Low cost
The front-end diaphragm of the diffused silicon pressure core used in the diffused silicon pressure transmitter is 316L. It can only measure non-corrosive air pressure, oil pressure, hydraulic pressure, etc. The temperature resistance of the diffused silicon pressure transmitter core is -20-80 ℃. Therefore, it is necessary to measure the pressure of high temperature medium. It needs to add heat sink, extend the pressure guide pipe or add condensation tank cooling method to use.
Silicon Pressure Sensor is a kind of pressure transmitter. Mainly used to measure the pressure of gas, liquid and other objects. The parameters are then converted into standard telecom signals.
Petroleum/Petrochemical/Chemical Matched with throttling device, it provides accurate flow measurement and control. Measures pressure and level in pipes and tanks.
Electricity/city gas/other company business Places such as measurement requiring high stability and high precision.
Pulp and paper It is used in places requiring chemical resistance, corrosion resistance, etc.
Steel/non-ferrous metals/ceramics It is used for furnace pressure measurement and other places requiring high stability and high precision measurement. For use where stable measurements are required under strictly controlled (temperature, humidity, etc.) conditions.
Machinery/Shipbuilding It is used in places where stable measurement is required under high-precision conditions such as strict control of temperature and humidity.
There are many types of pressure sensors. Such as resistance strain gauge pressure sensor. Semiconductor strain gauge pressure sensor. Piezoresistive pressure sensor. Inductive pressure sensor. Capacitive pressure sensor. Resonant pressure sensor, etc.
At present, the widely used pressure sensors include: diffused silicon piezoresistive pressure sensors, ceramic piezoresistive pressure sensors, sputtering film pressure sensors, capacitive pressure sensors, and sapphire pressure sensors with high temperature resistance.
But the most widely used is the piezoresistive pressure sensor, which has extremely low price, high precision and good linearity.
When the semiconductor silicon material is subjected to force, the atomic lattice changes. That is, the spacing of the lattice changes. Then the carrier mobility of the silicon material changes. changes, and the concentration changes. The lateral distribution structure and longitudinal distribution of carriers are disturbed. The distribution structure of the material eventually leads to a change in the resistivity of the material. The above is half of the A detailed elaboration of the piezoresistive effect of conductor silicon materials.
A pressure sensor that is also widely used, that is, a resistance strain sensor. Compared with a piezoresistive pressure sensor, the working process or working principle between the two is essentially different.
Piezoresistive Effect of Semiconductor Silicon Piezoresistive Pressure Sensor and Strain Effect of Metal Strain Gauge The difference between the two should be: the output power of the former, that is, the change of the resistance value mainly depends on the material. The change of the resistivity of the material. The output power of the latter, that is, the change of the resistance value depends on Changes in material geometry (strain.
The sensitivity of semiconductor silicon material is high, and its sensitivity is 50 to 100 times that of metal strain gauges.
In 1954, Smith devoted himself to researching the piezoresistive effect of semiconductor silicon material. At the same time, he used it to make pressure sensors.
The silicon pressure sensor researched in the early stage is similar to the semiconductor strain gauge. After development and research, the N-type silicon wafer is doped with P-type impurities by diffusion or ion implantation. The resistance bar is customized. It is matched behind the resistance bar Connect a suitable bridge circuit to make an integrated chip.
It is the same as the use of resistance strain gauges. The chip cannot be used independently to complete the measurement work. It also needs to be firmly attached to the elastic element to sense the change in the measured pressure.
Diffused silicon piezoresistive pressure sensor refers to a sensor made by using the above-mentioned chip as a sensitive element.
The piezoresistive chip of the piezoresistive pressure sensor is packaged in a shell, and the periphery is fixed to form a silicon cup structure.
On the circular silicon diaphragm, four resistance strips with equal resistance value are made by the above-mentioned diffusion or ion implantation doping method.
Put two of them in the range of compressive stress. The other two are fixed in the range of tensile stress. Together they form a Wheatstone bridge measurement circuit.
Resistor strips are drawn from the bridge power supply terminal and output terminal.
The above-mentioned structure is packaged by the manufacturing method of an integrated circuit to obtain a diffused silicon piezoresistive pressure sensor.
Capacitive pressure sensor is a pressure sensor that uses capacitive sensitive 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 z 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. The output can be in a certain relationship with the voltage by measuring the circuit. electrical signal.
Capacitive pressure sensors belong to the polar distance variable capacitive sensors. They can be divided into single capacitive pressure sensors and differential capacitive pressure sensors
Current MEMS pressure sensors include silicon piezoresistive pressure sensors and silicon capacitive pressure sensors. Both are microelectromechanical sensors produced on silicon wafers.
The silicon piezoresistive pressure sensor uses high-precision semiconductor resistance strain gauges to form a Wheatstone bridge as a force-electricity conversion measurement circuit. It has high measurement accuracy, low power consumption and extremely low cost. Piezoresistive sensor for a Wheatstone bridge. If there is no pressure change, its output is zero and almost no power consumption.
Capacitive pressure sensors use MEMS technology to create a grid-like shape on a silicon wafer. The upper and lower two transverse barriers become a group of capacitive pressure sensors. The upper transverse grille is displaced downward by pressure. Changed the spacing between the upper and lower transverse grids. It also changes the size of the capacitance between the plates, that is, △ pressure = △ capacitance.
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…
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…
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…
4-20mA to 0-10v voltage, this is I/V conversion. That is current-voltage conversion, usually used for long-distance signal transmission in the industry. How to convert 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…
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…
You may have heard of Static Pressure, Dynamic Pressure and Total Pressure. Especially in some industrial process pipe parameters. So what are Static Pressure, Dynamic…
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…
Steam pressure transmitters are widely used in the measurement and control of various high-temperature steam piping systems. The monitoring of steam pipes is very important…
Sino-Inst offers over 20 Silicon Pressure Sensors. A wide variety of Silicon Pressure Sensors options are available to you. Such as free samples, paid samples. Sino-Instrument is a globally recognized manufacturer of Silicon Pressure Sensors, located in China. Sino-Instrument sells through a mature distribution network that reaches all 30 countries worldwide. Silicon Pressure Sensors products are most popular in Europe, Southeast Asia, and Mid East. You can ensure product safety by selecting from certified suppliers. With ISO9001, ISO14001 certification.
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.
