The pressure switch is a simple pressure control device. When the measured pressure reaches the rated value, the pressure switch can send out an alarm or control signal.
The pressure switch adopts a high-precision, high-stability pressure sensor, and transmission circuit. Then through the dedicated CPU modular signal processing technology, the detection, display, alarm, and control signal output of the medium pressure signal are realized.
Pressure switches can be widely used to measure and control the gauge pressure and absolute pressure of various gases and liquids in the fields of petroleum, chemical industry, metallurgy, electric power, water supply, and other fields.
Pressure switches can be divided into coil spring tube pressure switches, diaphragm pressure switches, bellows pressure switches, and bellows pressure switches according to the sensing elements.
Pressure switches can be divided into mechanical and electronic smart pressure switches according to their nature.
According to the setting value, the pressure switch can be divided into an adjustable pressure switch and a non-adjustable pressure switch.
Pressure switches can be divided into general pressure switches, small pressure switches, smart pressure switches, explosion-proof pressure switches, marine pressure switches, differential pressure switches, etc. according to applications.
You can learn more about pressure switches by wikipedia.
How does a pressure switch work?
The working principle of the 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 through the connecting guide rod.
When the pressure drops to or rises to the rated recovery value, the disc is instantly reset and the switch automatically resets. Or simply when the measured pressure exceeds the rated value, the free end of the elastic element is displaced. Push the switch after connecting or comparing Element. Change the on-off state of the switch element to achieve the purpose of controlling the measured pressure.
The elastic elements used in the pressure switch include a single-turn spring tube, diaphragm, bellows and bellows. Switching elements include magnetic switches, mercury switches, micro switches, etc.
What is a pressure switch used for?
Pressure switches used in industrial machinery and systems must be robust, reliable, accurate, and have a long service life.
Pressure switches are usually used in paper machines, air compressors or pump sets.
In this type of equipment, we rely on pressure switches to act as safety devices, alarms, or control elements in the system.
Pressure switch air compressor An ordinary air compressor consists of three main parts: an electric motor, a V-shaped air pump, and an air storage tank.
There is also a pressure switch in the air compressor, which can adjust the start and stop of the motor. By adjusting the pressure in the oil tank, the air compressor can rest.
The air compressor factory can set a certain starting and stopping pressure according to the requirements of different customers during the commissioning process.
For example, when the compressor starts, the air is pumped into the interior. When the pressure reaches the set value, the pressure switch will contact the contact to stop the motor. When the pressure is lower than the set value, the air compressor will start again to keep the pressure in the oil tank within the pressure range.
How do you test a pressure switch?
The calibration method of pressure switch:
Find out the action setting value of the tested instrument according to the specification.
Select an appropriate pressure signal source to pressurize the test meter. A standard pressure gauge with an appropriate range detects the signal pressure. Use a multimeter to measure the on and off states of the contacts.
For the high report switch, slowly increase the pressure from low to high, and observe the multimeter. When the multimeter indicates a sudden change, the evaluation of the standard pressure gauge is the high reported value. Then slowly lower the pressure. When the multimeter indicates a sudden change again, the evaluation of the standard pressure gauge is the reset value.
For the under-report switch, the test pressure should be increased above the set value first, and then slowly decreased. When the multimeter indicates a sudden change, the evaluation of the standard pressure gauge is a low value. Press again slowly, and when the multimeter indicates a sudden change again, the indication value of the standard pressure gauge is the reset value.
The pressure switch is a utility switch that actively turns on or off when the set value is reached according to the set pressure. Pressure switches and pressure relays can only be opened or turned on under your given pressure to develop easy positional tube bundles. They are all on-off outputs. Pressure relays generally supply more input nodes or node types than pressure switches. The output of the pressure sensor can be an imitation signal or a digital signal. It is convenient for the subsequent level to deal with. It can also become a standard transmitter signal for short-range transmission.
As for the difference between pressure transmitter and pressure sensor, many people are not clear. I will tell you today: The pressure sensor is a sensor that converts pressure into electrical signal output. When the output electrical signal is a standard signal (such as 4-20mA, 0-10mA, etc.), we call it a pressure transmitter. This is the difference between a pressure sensor and a pressure transmitter. So in general, the pressure sensor we often say is actually a pressure transmitter.
You’ll find the pressure switch mounted on a 1/4-in.tube near the pressure tank. It’s what senses when water pressure has dropped to the point where the pressure tank requires more water. The switch then powers up the well pump.
The working principle of the pressure switch: When the pressure in the system is higher or lower than the rated safety pressure, the disc in the sensor moves instantaneously, and the switch connector is turned on or off through the connecting guide rod. When the pressure drops or rises At the rated recovery value, the disc is reset instantly and the switch automatically resets.
Of course, different pressure switches have different ways of resetting. If you need to reset a pressure switch, you’d better contact the manufacturer. Perform reset operation instructions.
Still have questions?
If you cannot find an answer to your question in our FAQ, you can always contact us and we will be with you shortly.
Sino-Inst offers over 50 Pressure Switches for pressure measurement. About 50% of these are liquid pressure swithces, 40% is gas pressure switches.
It is widely used in hydropower, tap water, petroleum, chemical, machinery, hydraulic and other industries to measure, display and control the pressure of fluid media on site.
A wide variety of Pressure Switches options are available to you, such as free samples, paid samples.
Sino-Inst is a globally recognized supplier and manufacturer of Pressure Switch instrumentation, located in China.
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.
Dynamic pressure sensor, the transmitter is a high frequency sensor.
The high frequency dynamic pressure sensor adopts silicon stack silicon technology. At the same time, it has high responsiveness. At the same time, it also has high accuracy in low frequency or static data. The high-frequency dynamic pressure sensor has its own hybrid temperature compensation, and the special processing can reach 2000℃ instantaneously. It can provide stable performance in a wide temperature range, with good linearity, high natural frequency, short rise time and wide excellent response frequency band.
Sino-Inst offers a variety of Dynamic Pressure Sensors for pressure measurement. If you have any questions, please contact our sales engineers.
2 times full scale pressure (100MPa product overpressure is 1.1 times full scale pressure)
Ambient temperature
-20 … +85℃
Medium temperature
-40 … +85℃, special can be -10℃~200℃
Vibration influence
≤±0.01%FS (X, Y, Z axis, 200Hz/g)
Load Resistance
≤(U-12)/0.02Ω
Natural frequency
150KHz~2MHz
Transmitter frequency response
0~1KHz~200KHz
Rise Time
0~1mS~2μS
Zero temperature drift
Typical: ±0.02%FS/℃, maximum: ±0.05%FS/℃
Sensitivity temperature drift
±0.02%FS/℃, maximum: ±0.05%FS/℃
Resolution
Infinitely small in theory, usually 1/100000
Medium
Gas or liquid compatible with 316 stainless steel
Power supply
Transmitter power supply: 12~36VDC (generally 24VDC), ±15VDC switching power supply or linear power supply Sensor power supply: constant current: 1mA~4mA; constant voltage: 5VDC~24VDC
Signal output
Analog: 4~20mA, 1~5 V DC, 0~10VDC, 0~5V DC Sensor output: 1.5mV~15mV/V
SI-512H High Temperature Pressure Sensor High Temperature Pressure Sensor for pressure measurement of high temperature gas or liquid. Such as steam pressure. High temperature up to 800 ℃.
SI-338 Ceramic Pressure Sensor Ceramic pressure sensor is a pressure sensor refined from a thick ceramic base using a refined ceramic base. Cost-effective. Support OEM processing. 0-0.2MPa -…- 40MPa
Sino-Inst offers over 20 Pressure sensors. A wide variety of Pressure sensors options are available to you. Such as free samples, paid samples. Sino-Instrument is a globally recognized manufacturer of Pressure sensors, located in China.
Sino-Inst sells through a mature distribution network that reaches all 30 countries worldwide. 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.
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.
Wireless pressure sensors are a game changer for many industries. No longer do you have to worry about wiring costs or maintenance. Our wireless battery powered pressure monitoring system offers long range connectivity via Bluetooth, or GPRS-NB-iot-LORA. It allows you to keep an eye on water pressure and offers differential pressure monitoring. With the help of our wireless pressure sensors, you’ll be able to keep a close eye on your operations without the need for a controller or indicator.
Sino-Inst offers a variety of Wireless Pressure Sensors for industrial pressure measurement. If you have any questions, please contact our sales engineers.
Ultra-low power consumption design. 60UA in sleep mode (3.6VDC battery power supply)
NB-iot Narrowband Internet of Things. Supporting our company’s Internet of Things cloud acquisition and monitoring platform.
Online monitoring. PC and mobile data applications. Real-time/historical/alarm data query.
On-site low-power five-digit display header. Continuous display and trigger display can be divided (optional)
Remote configuration: Remote configuration of parameters such as acquisition frequency/sending frequency/upper and lower alarm limits.
Data communication protocol MODBUS TCP. .
Dual power supply. The battery is powered by 3.6VDC/7.2 VDC lithium sub-battery. The battery life depends on the frequency cycle of the collected data. Generally it can be used for about 2-5 years. External power supply 5-30VDC.
High-precision 24-bit ADC collects and digitizes sensor signals.
Enhanced EMC anti-interference design. It is suitable for various industrial environments with harsh electromagnetic environment.
Abnormal alarm: abnormal alarm of overvoltage and undervoltage/low battery in the pipeline network
24hX365 online monitoring. The data server records data for several years.
Open cloud platform API interface/MODBUS-TCP interface. Seamlessly connect with user’s industrial configuration system, customized software and special platform.
The installation location of NB-iot IoT products must have NB-iot base station signal. Special IoT card. Low cost and low traffic, annual use.
Low power-battery powered
The low-power wireless pressure transmitter adopts advanced micro-power devices and perfect software management technology. Ensure the real-time performance of data monitoring and instrument status. Built-in large-capacity high-performance lithium battery, which can work continuously for 2-5 years.
Realize remote real-time monitoring, wireless transmission, no need for on-site wiring, saving manpower and construction costs.
The instrument is advanced in design, easy to install and use, and is an ideal upgrade product for traditional pressure transmitters.
Application of wireless pressure sensor
Wireless pressure sensors are mainly used in the following four aspects:
In the power industry. Wireless pressure sensors can be used in data transmission fields such as reactive power compensation, power distribution monitoring, meter collection, and street lamp monitoring.
In the water application industry. Water meter collection, remote monitoring of water resources management, wireless communication of waterway network monitoring.
In the field of environmental protection. Online monitoring system of pollution sources such as CEMS, water quality online monitoring, etc.
In the field of equipment maintenance. Such as elevator monitoring, air conditioning monitoring, etc.. Pressure sensors can be quickly embedded in the user’s monitoring instruments to complete the device monitoring GPRS remote transmission application.
Petroleum pipelines have the characteristics of large diameter, high pressure and large transmission volume. In the process of oil and gas transportation, the pressure transmitter is used to effectively monitor the pressure of the oil pipeline. Further prevent the occurrence of oil and gas pipeline leakage accidents and ensure the safe operation of oil and gas pipelines.
Industry pain points:
The energy transmission pipeline covers a wide area, and the pressure monitoring system based on the wired network is costly and difficult to deploy;
The pressure transmitter is often placed under the ground along with the pipeline. Once installed, it is not easy to replace. A low-power wireless networking solution is required to extend battery life.
NB-IoT wireless pressure transmitter integrates pressure detection, data acquisition, NB-IoT wireless communication, battery self-power supply and other functions. Realize high-precision measurement, automatically set the collection frequency and reporting frequency. Use NB-IoT network to upload data.
Background staff can set alert values for pressure data. Once the warning value is reached, measures to automatically close the valve can be taken immediately. Send work orders to maintenance personnel for quick processing.
The NB-IoT network covers a wide range. Under the same frequency band, NB-IoT has a gain of 20dB compared with the existing network, which is equivalent to improving the coverage area by 100 times. At the same time, it meets the coverage depth of the underground pipe network to ensure that there are no blind spots in the network;
NB-IoT can support massive IoT terminal connections. Supports low latency sensitivity and ultra-low device power consumption. Terminal standby time can reach more than 10 years;
The wireless pressure transmitter can collect, display, measure, report and store metering data in real time. Synchronously upload to the management platform. Ensure that the background personnel can monitor the pipeline status in real time.
Wireless Level Sensor – LoRa
The Wireless Level Sensor upgrades the LoRa wireless transmission function based on the Hydrostatic Level transmitter. Measure water or oil level. This product adopts the LORA debugging method, which can greatly increase the communication distance. It can be widely used in the field of short-distance Internet of Things wireless communication in various occasions.
The rapid development of wireless communication technology and computer technology has been applied to sensor technology. It makes wireless data collection of pressure sensors possible. Its unique performance is more advantageous than traditional pressure sensors. It can be used in areas where wiring and power supply are difficult, areas where people cannot reach. Such as high temperature, severe cold, high humidity areas, contaminated areas or areas where the environment is destroyed. And some temporary occasions. Realized the sensing system Remote testing. This is also an inevitable trend of testing in the information age.
System design
The pressure sensor wireless acquisition system designed in this paper is composed of the front-end sensor data acquisition transmitter part and the terminal data receiver part. Figure 1 shows the block diagram of the transmitter part (upper) and the receiver part (lower) of the sensor data collection.
The sensor data acquisition and transmission part is composed of a pressure sensor, a temperature sensor, a signal processing part, a microprocessor (generally a microcontroller) and a wireless transmission circuit.
Pressure and temperature sensors acquire pressure and temperature values of the surrounding environment.
The signal processing part includes the preceding channel, program-controlled amplifier and A/D converter. Its function is to extract and amplify the analog signal of the sensor under program control and perform analog/digital conversion.
The microprocessor is responsible for controlling the work of each part of the system and processing digital signals. The wireless transmission circuit is under the control of the microprocessor. The encoder encodes and processes the collected information data and transmits it with the transmission module.
The data receiving part is composed of wireless receiving circuit, microprocessor and display part.
Receive data from radio under the control of a microprocessor. After receiving a set of format data, the decoder in the receiving circuit decodes the format data. The current pressure information of the environment is obtained. Then the pressure information is displayed on the LED receiving panel.
Hygienic / Sanitary Pressure Transmitter Also called Hygienic pressure Transmitters, or tri clamp pressure transmitter. Sanitary pressure Transmitters is used to food &beverage or pharmaceutical application.
High-Temperature Pressure Transmitter High-temperature pressure transmitters with a 4-20mA output. which has a temperature capability of over 850 °C and is not pyroelectric.
Hydrostatic pressure transmitter Hydrostatic pressure transmitter is used for fluid hydrostatic pressure measurement. With working static pressure up to 32Mpa, for liquid, gas or steam .
SI-302 OEM pressure sensor OEM pressure sensors from Chinese manufacturer. Silicone filled. Protected by stainless steel diaphragm. Suitable for a variety of fluid media.
SI-10 Liquid pressure sensor Liquid pressure sensor is widely used for pressure measurement of various liquids. Like water or oils. IP68 waterproof.
SI-512H High Temperature Pressure Sensor High Temperature Pressure Sensor for pressure measurement of high temperature gas or liquid. Such as steam pressure. High temperature up to 800 ℃.
SI-338 Ceramic Pressure Sensor Ceramic pressure sensor is a pressure sensor refined from a thick ceramic base using a refined ceramic base. Cost-effective. Support OEM processing. 0-0.2MPa -…- 40MPa
More Applications and Markets of Wireless Pressure Sensors
What’s the Difference Between a Pressure Transducer and a Pressure Switch? Simply put, the Pressure Transducer is a signal conversion…
Wireless pressure sensor manufacturer
In conclusion, wireless pressure sensors have revolutionized the way industries monitor pressure measurement. The wireless battery powered pressure monitoring system has eliminated wiring costs, improved safety, and reduced maintenance costs.
Our wireless pressure transmitters offer additional features and benefits when compared to traditional pressure transmitters. If you’re interested in learning more about our wireless pressure transmitters, contact us today.
Sino-Inst, as the manufacturer of wireless pressure sensors, offer you with the best price.
Sino-Inst offers 10 wireless pressure sensors products. These are wireless pressure sensors, wireless differential pressure transmitter, and wireless temperature transmitter.
A wide variety of wireless pressure sensors options are available to you, such as free samples, paid samples. Sino-Inst is wireless pressure transmitter manufacturer, located in China.
Wireless pressure sensor products are most popular in North America, Domestic Market, and South America. You can ensure product safety by selecting from certified suppliers, with ISO9001, and 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.
Diaphragm Seal Pressure Transmitters work with Diaphragm Seals for those harsh working conditions. The purpose of the diaphragm seal is to isolate the pressure sensor from the process medium.
The diaphragm seal makes measuring pressure safer and more reliable. It is ideal for protecting pressure process transmitters even under harsh working conditions. The diaphragm seal can isolate the pressure sensor from the process medium. No matter absolute pressure or differential pressure measurement. Mounting with capillary and flange, Diaphragm Seal pressure transmitter can measure pressure, liquid level and flow.When the environment is extremely hot or cold, or when the process connection is difficult to connect to the measuring instrument. When the measured medium is corrosive, sticky, sticky or easily cured. Or when the process is not chemically compatible with the instrument material. It is recommended to use a diaphragm seal.
Sino-Inst offers a variety of Diaphragm Seal Pressure Transmitters for industrial pressure measurement. If you have any questions, please contact our sales engineers.
Diaphragm seals, also known as chemical seals or remote seals, are used for pressure measurements when the process medium should not come into contact with the pressurised parts of the measuring instrument.
A diaphragm seal has two primary tasks:
Separation of the measuring instrument from the process medium
Transfer of the pressure to the measuring instrument
Diaphragm seals offer the advantage that the “contact surface” between pressure medium and diaphragm is relatively large. Thus ensuring accurate pressure measurement, especially for very low pressures (< 600 mbar). Furthermore, they can be easily dismounted, e.g. for cleaning or calibration purposes.
Rosemount 1199
Rosemount 1199 remote transmission diaphragm system provides the world’s most extensive product variety and specifications to meet the requirements of various measurements and applications.
There are the following types of remote transmission differential pressure / level transmitters: 1) PFW flat type remote transmission device 2) RTW thread installation type remote transmission device 3) EFW inserted barrel remote transmission device 4) RFW flange mounted remote transmission device 5) SCW hygienic remote transmission device
The 1199 remote diaphragm can be assembled to Sino-Inst differential, gauge, and absolute pressure transmitters and liquid level transmitters.
Basically, diaphragm seals are used in all pressure measurement processes to avoid direct contact between the measuring instrument and the medium during this process.
In addition, if the measuring point cannot be installed or read because the measuring point is located in a hard-to-reach location, a diaphragm seal can also be used.
In both cases, the applied pressure is transferred to the measuring instrument through the system fill fluid in the diaphragm seal housing.
The diaphragm of the seal can be made of different materials, such as stainless steel, Hastelloy, Monel or tantalum. In addition, coatings with ECTFE, PFA or gold can also be used.
We can provide the best diaphragm seal design, materials, system fill fluid and accessories for each application. The combined configuration of the pressure measuring instrument and the diaphragm seal is mainly determined by the special application conditions of the diaphragm sealing system.
It is mainly composed of pressure measuring probe, capillary tube, filling liquid and pressure transmission head.
One end of the pressure measuring probe is provided with an elastic metal diaphragm
When the pressure acts directly on the surface of the measuring diaphragm, the diaphragm will have a slight deformation.
The high-precision circuit on the measuring diaphragm transforms this tiny deformation into a highly linear voltage signal proportional to the pressure and also proportional to the excitation voltage.
Then use a special chip to convert this voltage signal into an industry standard 4-2OmA current signal or 1-5V voltage signal.
Because the measuring diaphragm adopts standard integrated circuit, which contains linear and temperature compensation circuits, it can achieve high precision and high stability.
The remote seal is used to prevent the medium in the pipeline from directly entering the pressure sensor assembly in the pressure transmitter. It is connected to the transmitter by a capillary filled with fluid. As a result, they’re often used in refining, petrochemical, and chemical plants.
Diaphragm pressure gauge consists of a diaphragm isolator and a universal pressure gauge to form a system pressure gauge. The spring tube is evacuated by special equipment. And fill people with irrigation fluid. Seal it with a diaphragm. When the pressure P of the measured medium acts on the diaphragm, it deforms. The working fluid filled in the compression system makes the working fluid form a △ P equivalent to P, with the help of work. The conduction of the liquid causes a corresponding elastic deformation-displacement at the free end of the elastic element (spring tube) in the pressure meter. According to the working principle of the pressure instrument matched with it, the measured pressure value is displayed.
Diaphragm pressure gauges consist of a system of diaphragms and universal pressure gauges. Diaphragm pressure gauges and equipment are mainly connected with threaded connections, flange connections and sanitary clamps. Diaphragm pressure gauges are suitable for measuring the pressure of medium with strong corrosion, high temperature, high viscosity, easy to crystallize, easy to solidify, and solid floats, as well as occasions where the measurement medium must be avoided from entering the general-purpose pressure meter and to prevent the accumulation of sediment and easy to clean.
The characteristics of the filling fluid determine the performance of the sealing system to a large extent, both in response time and temperature to the heat dissipation conditions. The initial consideration in choosing a sealed diaphragm to fill fluid is the media compatibility of the process. Glycerin, silicone oil and halogenated carbon are the most commonly used sealed diaphragm filling fluids. In general there are three ways to fill a diaphragm seal: 1. Filling a diaphragm seal after assembly of the seal to the instrument 2. Filling a diaphragm seal before assembly of the seal to the instrument 3. Filling a diaphragm seal with a capillary between the seal and the instrument
What Is Static Water Pressure? Definition of Static Water Pressure: Static Water Pressure refers to the pressure on water when it is stationary or moving in a straight line at…
The Hydrostatic Pressure Transmitter measures the hydrostatic pressure exerted by a hydrostatic head. Use these hydrostatic pressure transmitters to measure the liquid level in storage tanks, processing vessels, collection tanks,…
What is a ceramic pressure sensor? Ceramic pressure sensors are sensor diaphragms made of ceramic alumina (Al2O3). Ceramic is a material with high elasticity, corrosion resistance, wear resistance, impact, and…
Intrinsically safe type is an explosion-proof type of electrical equipment. When purchasing electrical equipment, do you often hear about intrinsic safety? For example, when ordering pressure transmitters or flow meters…
What does SCADA stand for? SCADA is the abbreviation of Supervisory Control And Data Acquisition. Namely data acquisition and monitoring control system. SCADA system is also called monitoring configuration software,…
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?…
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…
What is a PID controller? A PID controller is an instrument used in industrial control applications to regulate temperature, flow, pressure, speed, and other process variables. PID is the abbreviation…
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…
Dynamic pressure sensor, the transmitter is a high frequency sensor. Sino-Inst offers a variety of Dynamic Pressure Sensors for pressure measurement. If you have any questions, please contact our sales…
In the chemical production, the medium often encounters problems such as impurities, crystal particles or agglomeration. It is easy to block the connecting pipeline. At this time, a flange-type differential…
Differential pressure transmitter installation guide helps you solve the installation problem of DP Transmitters. Sino-Inst offers a variety of differential pressure transmitters for pressure/level/flow measurement. If you have any questions,…
Sino-Inst is a manufacturer of Diaphragm Seal Pressure Transmitters.
Sino-Inst offers over 20 Diaphragm Seal Pressure Transmitters at best price. About 50% of these are Pressure level Transducer, 40% are Differential Pressure transmitters, and 40% are Diaphragm Seal Pressure transmitters. A wide variety of Diaphragm Seal Pressure Transmitters options are available to you, such as free samples, paid samples.
Sino-Inst is a globally recognized supplier and manufacturer of Diaphragm Seal Pressure Transmitters, located in China. Sino-Inst sells through a mature distribution network that reaches all 50 states and 30 countries worldwide. Diaphragm Seal Pressure Transmitters products are most popular in Domestic Market, 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.
Hydrostatic level measurement is often used for tank level measurement. Hydrostatic level measurement is one type of continuous level measurement.
What Is Hydrostatic Pressure?
Hydrostatic pressure sensors are used to measure the level or fill height of liquids. Hydrostatic pressure measurement is suitable for liquid level measurement due to the static pressure effect of non-flowing fluids. This physical principle describes the effect of the gravity of a stationary (i.e. non-flowing) liquid on the measurement point. This gravity is often described as “hydrostatic pressure”.
Sino-Inst offers a variety of Hydrostatic level senors for industrial level measurement. If you have any questions, please contact our sales engineers.
SMT3151TR Submersible Level Transmitter Hydrostatic level transmitter is also called hydrostatic level gauge. The rod-type Hydrostatic level transmitter 4-20mADC standard signal output. Flange or threaded installation. Can withstand high temperatures up to 450 ℃.
SI-PCM260 Deep Well Water Level Sensor Well water level sensor is to apply Hydrostatic Level Sensor to deep well. Well water level sensor submerged in deep well work together with submersible water pump. Range 300m ～ 1000m.
SI-302 Anti-corrosive Submersible Level Transmitter Submersible Level Transmitter is made of Anti-corrosive all-tetrafluoroethylene(PTFE) material. It has high temperature resistance, corrosion resistance and anti-clogging.
Wireless Level Sensor – LoRa The Wireless Level Sensor upgrades the LoRa wireless transmission function based on the Hydrostatic Level transmitter. Measure water or oil level.
Pressure Guided Submersible Level Transmitter Stainless Steel Level Sensor-Pressure Guided Submersible Level Transmitter. The sensor part and the signal processing circuit are inside the junction box. It is used for high temperature, corrosive liquid, sewage, etc.
The above level sensors are Submersible Level Transmitters. According to your measurement needs, we can provide various customizations. For example: measuring range, installation method, output method, explosion-proof, lightning protection, anti-corrosion, etc.
If you cannot use a level probe, we recommend that you use a pressure level sensor.
Hydrostatic level measurement with Pressure Transmitters
Flange Mounted Differential Pressure Transmitter
Extended Diaphragm Seal DP Level Transmitter
Remote Seal Differential Pressure Transmitter
Differential pressure(DP) level transmitter
In open and closed tanks, there may be special conditions such as high temperature and corrosion. At this time, use a pressure or differential pressure transmitter, with flange, diaphragm, capillary, etc. We can achieve the static pressure measurement of the tank liquid level.
Pros & Cons of Hydrostatic level measurement system
About Hydrostatic level transmitter advantages and disadvantages, we do a simple analysis here. If you want to know more about the advantages and disadvantages of level transmitters. Please refer to Sino-Inst Level Transmitters.
Advantages
High measurement accuracy;
The ultra-high range can be customized up to 1000 meters.
Easy to install;
The signal can be transmitted remotely;
The corrosion of various media can be resisted by choosing different materials;
Suitable for explosion-proof occasions;
Low cost;
Disadvantages
The measurement signal needs to be converted;
When the measuring range is greater than 5 meters, it is impossible to measure the high temperature medium temperature exceeding 125 ℃;
If you choose a submersible pressure transmitter. You must lower the device into the medium by cable. Until you reach the bottom of the tank, reservoir or underground resources, or until you reach the required zero level. Then, run the cable from the oil tank or water tank to the control system. Connect the level probe to the PLC accordingly.
If you have turbulent media, you should use an extra tank weight to stabilize the level probe in the media. To obtain a stable pressure reading. To prevent the cable from any mechanical damage. You can use the cable clamp to fix the cable on the top of the water tank. Or when connecting the cable to the control system.
If you choose a standard pressure transmitter. Simply screw the transmitter into the threaded hole on the bottom or side of the tank. Then, connect the transmitter to the PLC with the appropriate cable connector. Or if cable connection is selected, connect the transmitter directly to the control system.
Capacitive liquid level transmitter is the core sensor working principle of a transmitter. Refers to an instrument that measures differential pressure by detecting changes in capacitance on both sides of the sensing diaphragm. Theoretically, it can measure the pressure and differential pressure in any form, including liquid level. The reason why it is called a liquid level transmitter is only because its installation method is specially designed for liquid level measurement. The essence of the capacitive liquid level transmitter is a differential pressure transmitter.
Hydrostatic level sensor refers to a method of measuring liquid level using the principle of Hydrostatic pressure. Liquid level height × medium weight = pressure difference between liquid level and upside. This method of measurement requires the use of a differential pressure transmitter. If this differential pressure transmitter is designed to be more suitable for liquid level measurement, it is called a liquid level transmitter.
A submersible pressure transducer or a flush pressure sensor measures the height-dependent weight-force of the liquid column, also known as hydrostatic pressure. This pressure measurement is directly proportional to the liquid level respectively liquid column, at the measuring point of the pressure sensor. It is, therefore, necessary, for the measurement of level, that the pressure sensor is placed as close as possible to the level of the vessel’s bottom. The measured hydrostatic pressure then directly corresponds to the height of the liquid column, from the ground-level measurement point to the surface-level of the medium. So, the filling height is calculated from the distance of the medium surface, to the measuring point by the pressure measurement. The weight force of the liquid column, thus the hydrostatic pressure, however, is not only directly proportional to the filling height but also varies with the specific gravity of the medium and the force of gravity. Read more about: Differences! Static pressure vs dynamic pressure vs total pressure
Hydrostatic pressure is the pressure that a homogeneous fluid acts on an object. This is a omnidirectional force that is evenly applied to all parts of the surface of the object. Increased hydrostatic pressure will reduce the volume of the stressed object, but will not change its shape
Hydrostatic level transmitter is actually a type of pressure transmitter. Hydrostatic level transmitter is the application of pressure transmitter to liquid level measurement. The submersible Hydostatic pressure level transmitter is based on the principle that the measured liquid static pressure is proportional to the height of the liquid. Piezoresistive effect using diffused silicon or ceramic sensitive elements. Convert static pressure into electrical signal. After temperature compensation and linear correction. Convert to 4-20mADC standard current signal output. In order to achieve liquid level measurement.
Usually we measure the liquid level by measuring the pressure. When the liquid level transmitter is put into a certain depth in the measured liquid, the pressure formula of the sensor facing the liquid surface is: Ρ = ρ.g.H + Po. In the formula: P: the pressure on the liquid face of the transmitter Ρ: measured liquid density G: local gravity acceleration Po: atmospheric pressure on the liquid surface H: Depth of transmitter into liquid At the same time, the pressure of the liquid is introduced into the positive pressure chamber of the sensor through the air-conducting stainless steel. Then connect the atmospheric pressure Po on the liquid surface to the negative pressure chamber of the sensor. To offset Po on the back of the sensor, the pressure measured by the sensor is: ρ.g.H. Obviously, by measuring the pressure P, the liquid level depth can be obtained. Of course, if the liquid level is measured, the pressure value can also be converted. Read more What is a diaphragm seal?
Yes. If it is an open tank use a transmitter. If it is pressurized, 2 pressure transmitters must be used (the difference in the software is the liquid level height). The range unit of the transmitter is preferably mmH2O. If the medium is not water, its density must also be known. This allows for span correction (top transmitters do not do span correction). Generally, a double-diaphragm differential pressure transmitter is used to detect the liquid level.
Wastewater level sensor occupies a large proportion in sewage treatment applications. It is used in almost all aspects of sewage treatment. In sewage treatment, the level of waste…
Non-contact radar level sensor Radar level sensors are used for continuous non-contact level measurement of liquids or solids. And convert it into electrical signals. The radar level sensor…
A capacitive water level sensor is often used to measure the water level of the water storage tank. The capacitive water level sensor uses the change of measuring…
The capacitive fuel level sensor refers to a capacitive liquid level transmitter used to measure the oil level. According to the principle of capacitance sensing, when the height…
Radar level transmitter and Ultrasonic level transmitter are both liquid level measuring instruments. The most obvious difference is that one uses electromagnetic waves and the other uses ultrasonic…
Sulfuric acid storage tanks are mainly used to store sulfuric acid produced in acid production. The accuracy of the liquid level of the sulfuric acid storage tank is…
What is a laser level transmitter? A laser level transmitter is also called a laser level meter. Industrial Accurate, non-contact, and uninterrupted real-time monitoring of material height. Designed…
The Silo/Bin level measurement and control system solves the problem of frequent dumping accidents in the powder silo of the mixing station during the feeding process. It avoids…
How do you measure the depth of water? Water depth sensors are also known as water level sensors. Water depth sensors are often used to measure tank levels,…
The water tank level sensor is an integral part of the water level monitoring and control system. They are responsible for real-time detection and feedback of the water…
Hydrostatic level sensor price
Compared with other liquid level transmitters, Hydrostatic level esnsor has lower cost. The price of Hydrostatic level sensor is mainly affected by the measurement situation. Such as:
Range range;
Medium temperature;
The medium is corrosive;
Sino-Inst is a manufacturer of Hydrostatic level sesnor. Sino-Inst provides customers with the best Hydrostatic level measurement price. For example, the general-purpose Hydrostatic level transmitter has a reference price of USD70. If you want to know the exact price, please contact our sales engineer.
Sino-Instrument offers detailed product specifications and data sheets for review. Our application engineers, can help ensure you choose exactly what you need for your specific installation. Or if you need the RFQ instantly, we can offer you with the submersible level transmitter price immediately.
Sino-Inst offers over 50 Hydrostatic level sensors at best price.
About 50% of these are Submersible Pressure Transducer, 40% are Differential Pressure Gauge, and 40% are Diaphragm Seal Pressure transmitters. A wide variety of Submersible Pressure Transducer options are available to you, such as free samples, paid samples.
Sino-Inst is a globally recognized supplier and manufacturer of Submersible Pressure Transducer, located in China. Sino-Inst sells through a mature distribution network that reaches all 50 states and 30 countries worldwide. Submersible Pressure Transducer products are most popular in Domestic Market, Southeast Asia, and Mid East.
You can ensure product safety by selecting from certified suppliers, with ISO9001, ISO14001 certification.
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.
Submersible Level Transmitter is made of Anti-corrosiveall-tetrafluoroethylene(PTFE) material. It has high temperature resistance, corrosion resistance and anti-clogging.
Submersible level transmitter made of PTFE is perfect in the harshest applications. Like Acid and alkali environment, Sludge and Slurries. Anti-corrosive Submersible Level Transmitter utilizes the linear change law of liquid height, density and pressure. It converts the change of liquid level into linear 4-20mADC standard signal output. Integrate temperature compensation calibration technology. Easy installation. Anti-corrosive Submersible Level Transmitter adopts two-wire system. 4 ～ 20mA output. 24V DC power supply. ATEX, 3 wire, remote mount transmitter optional.
Sino-Inst offers a variety of Submersible level transmitters with 4-20mA for industrial level measurement. If you have any questions, please contact our sales engineers.
Features of SI-302 Anti-corrosive Submersible Level Transmitter
Corrosion resistance, high precision, low cost, high temperature resistance, anti-clogging;
Convenient installation. Directly put the lowest point of the liquid level of the measured medium. Very convenient to use;
Solid structure. No moving parts. High reliability. Long service life;
Widely used to measure the liquid level of any liquid. Except for the medium corrosive to tetrafluoroethylene;
From water, oil, acid, alkali, salt to paste with high viscosity can be measured with high accuracy. It is not affected by the foaming, deposition and electrical characteristics of the measured medium.
With power supply reverse polarity and overload current limit protection.
Specifications of Submersible Level Transmitter
Measuring range:
0~200m
Accuracy:
0.5
Signal output:
4~20ADC, 0~20mA
Loading resistance:
0~600Ω
Transmitting distance:
>1000m
Working voltage:
24VDC
Working temperature:
-50~ +80 °C; -50~ +450 °C;
Environmental temperature:
-40~ +50 °C
Relative humidity:
≤85%
Contacting liquid material:
Stainless steel, PP, PTFE
Installation type:
Flange: DN32 (HG/T20593,20595-97) RF sealing face ； G2″ thread（customize）
Applications of Anti-corrosive Submersible Level Transmitter
Anti-corrosive Submersible Level Transmitter liquid contact material uses PTFE. Fully sealed welding of stainless steel shell. If customer needs, can be customized full PTFE material. Industry standard 4 ～ 20mA or 0 ～ 10mA signal output. Basically, no maintenance is required, and the wetted part is made of full PTFE material, which is extremely resistant to corrosion.
Anti-corrosive Submersible Level Transmitter is widely used in harshest applications such as Sludge and Slurries.
Product Applications: Sulfuric acid, hydrochloric acid, hydrofluoric acid; Corrosive liquids such as liquid alkali, xylene and acetone; Wastewater; Sludge pits, clarifiers, digesters; Alum tanks; Chemical storage tanks; Oil tanks; Lime slurry; Sumps; Reservoirs;
The basic working principle of Hydrostatic Level Sensor is static pressure level measurement.
In liquid, the pressure generated at a certain depth is generated by the weight of the medium itself above the measurement point. It is proportional to the density of the medium and the local acceleration of gravity.
The formula P = ρgh reflects the proportional relationship between them.
Where P = pressure, ρ = medium density, g = gravity acceleration, h = depth of measurement point.
Therefore, the physical quantity measured by the input liquid level gauge is actually pressure. It can be understood by the calibration unit mH2O of the input level gauge. The actual liquid level must be obtained by conversion after knowing the two parameters of density and gravity acceleration. In the industrial field, such conversion is usually performed by a secondary instrument or PLC.
The Hydrostatic Level Sensor mainly measures corrosive liquids such as hydrochloric acid, hydrogen peroxide, etc. Or chemical and electroplating wastewater. Mainly used in measuring corrosive media. It has the advantages of strong corrosion resistance and stable performance.
More Submersible Pressure Transmitters for level measurement
Hydrostatic level transmitter-Rod Type
Submersible Pressure Transducer
Hydrostatic Level Sensor
Deep Well Water Level Sensor
Submersible Level Transmitter Calibration
Unscrew the protective cover and you will see the zero and full range resistors. External standard power supply and ammeter (above 0.2 level) can be adjusted. Proceed as follows:
When the transmitter has no liquid. Adjust the zero resistor to make the output current 4mA;
Transmitter is filled to full scale. Adjust the full range resistor to make it output current 20mA;
Repeat the above steps two or three times. Until the signal is normal;
The adjustment is completed. Tighten the protective cover.
Submersible Level Transmitter installation and precautions
The transmitter probe has an M20 × 1.5 interface, which can be screwed directly on the wall of the container or pipeline. Can also put the transmitter into the pool or other liquids. Cable lead to display instrument, secondary instrument or control room. Note that the cable part on the ground needs to be protected or elevated. If there is sediment at the bottom of the liquid to be tested. The transmitter should be raised or filtered for protection.
A. Instructions for installation of input liquid level sensor:
Sludge and oil residue are easy to deposit on the bottom of the tank. It is recommended to move the measuring probe at a certain height away from the bottom of the tank (cabin). To avoid debris blocking the probe.
When the medium in the tank fluctuates greatly and the air guide cable is very long. The probe should be fixed with a sleeve. To prevent the probe from swinging and affecting the measurement accuracy.
When the transmitter is installed, the bending radius of the air guide cable should be greater than 10 cm. Avoid excessive bending to damage the air guide cable.
The ground terminal of the input liquid level transmitter should be reliably grounded. The power shield should be connected to it.
The installation direction of the transmitter is vertical. The installation position of the input type (probe) should be far away from the liquid inlet and outlet and the agitator.
If the medium in the tank has large vibration, wire should be wrapped around the transmitter (probe). Use steel wire to reduce shock to avoid breaking the cable.
B. How to install the input liquid level sensor (probe) to prevent damage to the diaphragm?
When the Submersible Level Transmitter is installed in a stationary deep well or pool. Usually the steel pipe with inner diameter Φ45mm is fixed in water. Make small holes at different heights on the opposite side of the liquid flow direction, so that the medium can enter the tube smoothly. Then put the input liquid level transmitter into the steel pipe and use it.
It is best to choose a regulated power supply to supply power separately. The stability of the power supply affects the performance index of the transmitter. It is best to control its error to less than one-fifth of the allowable error of the transmitter. For products with special power supply requirements, special power supplies must be connected.
The signal cable of the liquid level transmitter should adopt shielded cable. Prevent electromagnetic interference.
Connect the transmitter according to the correct wiring method. The power-on time should be between 15 and 30 minutes.
If the liquid level transmitter is installed in the pool, water tower and other occasions. You can sink its probe underwater. Keep away from locations where the water velocity is too fast.
In the installation of liquid level transmitters with large fluctuations such as submersible pumps, it is best to use the method of inserting steel pipes. The steel pipe should be fixed firmly. A hole should be made in the steel tube at every interval. The position of the steel pipe should be far away from the water inlet and outlet.
The junction box should be fixed firmly. Or install a fixed bracket. It must be protected from dry and shaded places and must not be exposed to rain.
Protect the ventilation cable. It must not be bent, blocked or damaged. Extra cables can be coiled nearby.
The liquid level transmitter installed outdoors must also take lightning protection measures.
Submersible Level Transmitter for Wastewater
The wastewater treatment process involves many occasions where the liquid level needs to be measured. Also due to the characteristics of the sewage treatment process itself. Need to choose the appropriate level sensor according to the characteristics of each process and medium.
The sensor must be suitable for measuring sewage. The acid, alkali and small particles in the sewage have no effect on the measurement accuracy and life. The sensor has high measurement accuracy. Easy to install. Easy to adjust. The level gauge display is intuitive and has analog output and alarm output functions.
Generally speaking, magnetic float level sensor, ultrasonic level sensor and Submersible Level Transmitter can be used to measure the sewage level.
The magnetic float level sensor is to convert the displacement of the magnetic float with the change of liquid level into a simulated linear standard signal output. The measurement accuracy can generally reach 1.5. When used for sewage measurement, the oil and suspended particles in the sewage will gradually adhere to the wall of the level gauge pipe. Over time, the amount of floating objects increases and the friction increases. The floating ball cannot rise and fall freely as the liquid level changes. It cannot be measured.
The ultrasonic level sensor is based on the relationship between the distance from the ultrasonic probe to the surface of the measured object and the time. This type of liquid level gauge is almost not limited by the measured medium, but has a blind zone, which is suitable for the level measurement of the large “H” value of the storage silo. For the level measurement of sewage pits, due to the existence of blind areas, it has a greater impact on the accuracy of the measurement.
Submersible Level Transmitter (cable static pressure liquid level transmitter) uses ceramic or diffused silicon sensors. The sensor goes directly into the measured liquid. The static pressure of the liquid medium directly acts on the sensor diaphragm. The static pressure is proportional to the height of the measured liquid. This level transmitter is small. Easy installation and low cost.
Compare the advantages and disadvantages of the above level gauges. Most customers will choose Submersible Level Transmitter.
Hydrostatic pressure level sensor (Submersible Level Transmitter) is a pressure sensor that measures liquid level based on the principle of static pressure measurement. It can also be called “static pressure liquid level gauge, liquid level transmitter, liquid level sensor, water level sensor”
What is the water level sensor?
The water level sensor is an instrument that can convert the water level parameter of the measured point into the corresponding power signal in real time. It is mainly composed of a fully sealed isolation membrane oil-filled sensor and a built-in high-performance microprocessor. There are many types of water level sensors. There are three common types of ultrasonic liquid level sensors, servo liquid level sensors and static pressure liquid level sensors. Due to the differences in their working principles and performance, their applications are also different.
What is ultrasonic level sensor?
The ultrasonic level sensor is a non-contact liquid level sensor. Ultrasonic sensors are sensors developed using the characteristics of ultrasound. Ultrasound is a mechanical wave with a vibration frequency higher than that of sound waves, which is generated by the vibration of the transducing wafer under the excitation of voltage. It has high frequency, short wavelength and small diffraction phenomenon. In particular, it has good directivity, and can be ray and directional propagation. Ultrasound has a great ability to penetrate liquids and solids. Especially in the opaque solids of sunlight, it can penetrate a depth of tens of meters.
Sino-Inst offers over 10 Submersible Level Transmitters. About 50% of these are Submersible Level Sensors, 40% are water level meters, and 40% are liquid treatment. A wide variety of Submersible Level Transmitter options are available to you, such as free samples, paid samples.
Sino-Inst is a globally recognized supplier and manufacturer of Submersible Level Transmitter, located in China.
Sino-Inst sells through a mature distribution network that reaches all 50 states and 30 countries worldwide. Submersible Level Transmitter products are most popular in Domestic Market, 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.
Remote seal differential pressure transmitter is used to prevent medium from entering transmitter. The pressure sensitive diaphragm and the transmitter are connected by a capillary filled with fluid. It is used to measure the level, flow and pressure of fluids, gases or steam.
Remote Seal Differential Pressure Transmitter is often used as a tank level transmitter. The smart pressure transmitter is connected with a stainless steel flange by capillary. The pressure is sensed by a remote transmission device installed on a pipe or container. The pressure is transmitted to the body of the transmitter through the filling silicone oil in the capillary. Then The delta chamber and the amplifying circuit board in the main body of the transmitter convert the pressure or differential pressure to 4 ～ 20mA. The DC signal is output. It can communicate for the setting and monitoring by cooperating with the HART communicator.
Sino-Inst offers a variety of DP pressure transmitters for industrial pressure measurement. Connection with diaphragm seals. If you have any questions, please contact our sales engineers.
Features of Remote Seal Differential Pressure Transmitter
Simulate the “online operation” assessment one by one. Ensure that the transmitter works stably and reliably under the extreme ambient temperature, medium temperature and working pressure (including positive pressure or vacuum).
Adopt “dynamic profile” remote transmission diaphragm structure. The diaphragm will not be damaged after overload. The accuracy will not change after long-term work.
The filling system with full fusion welding and rigid sealing structure is selected to eliminate the occurrence of oil leakage.
Novelly designed capillary coupling parts. Capillary is reliably protected. It is not easy to break when used on site.
Variety, form and size of remote transmission device. And a variety of filling liquid types. It can meet the measurement needs of various occasions.
Various special products can be provided. Including high temperature, high vacuum, fast response and unequal length capillary (length ≤ 3 meters) remote transmission pressure transmitter
Specifications of Remote Seal Differential Pressure Transmitter
Output signal:
4 ～ 20MA. DC two-wire system (analog) superimposes the digital signal on the two-wire 4 ～ 20mA DC signal, and the user selects linear or square root output.
Power supply:
12 ～ 45V.DC;
Load characteristics:
Power supply impact: <0.005% output range / V; Load effect: when the power supply is stable, there is no load effect; Measurement accuracy: ± 0.1% of the adjustment range, ± 0.2% standard accuracy is ± 0.2%, if other accuracy is selected, please indicate when ordering and selecting; Range ratio: 10: 1 or 100 to 1; Resistance: usually adjustable from 0.1 to 16 seconds, when inert liquid is filled or with a remote transmission device, the time constant will increase; Startup time: <2 seconds, no warm-up is required.
0.05% large range value, receiving radiation frequency 27 ～ 500MHz, test field strength 3V / m.
Indication table (%):
LCD digital display accuracy ± 0.2%.
Vibration effect:
± 200% / g when vibrating at 200Hz in any direction.
Installation position:
The diaphragm is not installed vertically, and a zero error of less than 0.24KPa may occur, but it can be corrected by zero adjustment.
Weight:
3.9Kg (excluding accessories).
Note: ① The working pressure of the remote pressure transmitter also depends on the specifications of the selected flange. ② The working temperature of the remote transmission device is determined by the type of filling liquid selected. ③ The remote transmission pressure transmitter refers to the output change produced by the temperature of the remote transmission device on one side. ④ The effects of static pressure and temperature are measured during a large range. ⑤ The length of the capillary on the side of the GP remote pressure transmitter is generally 1.5 meters, and the length should not exceed 3 meters (special agreement is agreed).
DP Remote Seal Pressure Transmitter with Diaphragm Seal Installation
Rosemount 1199 remote transmission diaphragm system provides the world’s most extensive product variety and specifications to meet the requirements of various measurements and applications.
There are the following types of remote transmission differential pressure / level transmitters: 1) PFW flat type remote transmission device 2) RTW thread installation type remote transmission device 3) EFW inserted barrel remote transmission device 4) RFW flange mounted remote transmission device 5) SCW hygienic remote transmission device
Applications of Remote Seal Differential Pressure Transmitter
Remote Seal Differential Pressure Transmitter is a pressure sensor assembly used to prevent the medium in the pipeline from directly entering the transmitter. It is connected to the transmitter by a capillary filled with fluid. It is used to measure the liquid level, flow rate and pressure of liquid, gas or steam. Then it is converted into 4 ～ 20mA DC signal output. The applicable media are as follows:
Viscous medium at high temperature;
Easily crystallized medium;
Precipitation medium with solid particles or suspended matter;
Strongly corrosive or highly toxic medium;
It can eliminate the occurrence of leakage of the pressure guiding pipe and pollute the surrounding environment. It can be avoided when using the isolation liquid. Because of the unstable measurement signal.
Continuously and accurately measure the interface and density;
The remote transmission device can avoid the mixing of different instantaneous media. So that the measurement results truly reflect the actual situation of process changes;
Places with high sanitation requirements;
Such as in the production of food, beverage and pharmaceutical industries. Not only does the transmitter contact with the media meet hygienic standards, but it should be easy to rinse to prevent cross-contamination of different batches of media.
In the use process, we should pay attention to consider the following situations:
When measuring the liquid pressure, the installation location of the remote pressure transmitter should avoid the impact of the liquid (that is, the water hammer phenomenon). In order to prevent the sensor from being damaged by overpressure.
When the remote pressure transmitter transmitter freezes in winter. The transmitter installed outdoors must take anti-freezing measures. Avoid expansion of liquid in the pressure port due to icing volume. Lead to sensor damage.
When wiring, pass the cable through the waterproof connector (accessory) or the flexible tube and tighten the sealing nut. In order to prevent rainwater etc. from leaking into the transmitter housing through the cable.
When the remote pressure transmitter is used to measure the liquid pressure. The pressure tap should be opened on the side of the process pipe. In order to avoid sedimentation and accumulation of slag.
To prevent the flange liquid transmitter from contacting with corrosive or overheated media. It is also necessary to prevent scum from depositing in the duct;
When measuring the pressure of the gas, the pressure port should be opened at the top of the process pipeline. And the flange level transmitter should also be installed in the upper part of the process pipeline. In order to quickly deposit the deposited liquid into the process pipeline.
When measuring the steam or other high temperature medium of the remote pressure transmitter, it is necessary to connect a condenser such as a buffer tube (coil tube). The operating temperature of the transmitter should not be exceeded.
Remote Seal Differential Pressure Transmitters Working Principle
What is a diaphragm seal?
Diaphragm seals, also known as chemical seals or remote seals, are used for pressure measurements when the process medium should not come into contact with the pressurised parts of the measuring instrument.
A diaphragm seal has two primary tasks:
Separation of the measuring instrument from the process medium
Transfer of the pressure to the measuring instrument
The remote seal is used to prevent the medium in the pipeline from directly entering the pressure sensor assembly in the pressure transmitter. It is connected to the transmitter by a capillary filled with fluid. As a result, they’re often used in refining, petrochemical, and chemical plants.
What are the advantages of diaphragm seals?
Diaphragm seals offer the advantage that the “contact surface” between pressure medium and diaphragm is relatively large. Thus ensuring accurate pressure measurement, especially for very low pressures (< 600 mbar). Furthermore, they can be easily dismounted, e.g. for cleaning or calibration purposes.
How do diaphragm seals work?
Basically, diaphragm seals are used in all pressure measurement processes to avoid direct contact between the measuring instrument and the medium during this process.
In addition, if the measuring point cannot be installed or read because the measuring point is located in a hard-to-reach location, a diaphragm seal can also be used.
In both cases, the applied pressure is transferred to the measuring instrument through the system fill fluid in the diaphragm seal housing.
The diaphragm of the seal can be made of different materials, such as stainless steel, Hastelloy, Monel or tantalum. In addition, coatings with ECTFE, PFA or gold can also be used.
We can provide the best diaphragm seal design, materials, system fill fluid and accessories for each application. The combined configuration of the pressure measuring instrument and the diaphragm seal is mainly determined by the special application conditions of the diaphragm sealing system.
Diaphragm type level transmitter working principle
Smart differential pressure transmitters are often used to measure liquid level, flow rate, etc. Differential pressure transmitter cooperates with sealing diaphragm, capillary, etc.
The differential pressure type liquid level gauge uses the principle that when the liquid level in the container changes, the static pressure generated by the liquid column also changes accordingly, as shown in the figure.
For closed tanks. Set the bottom pressure to P. If the pressure on the liquid surface is P3 and the liquid level height is H, then: P = P3 + Hpg (3-11) In the formula: p is the medium density; g is the acceleration of gravity. From the formula ((3-1 “available: △ P = P-P3 = Hpg (3-12) Usually the density of the measured medium is known, the pressure difference △ P is proportional to the liquid level height H. The pressure difference on the side will know the measured liquid level height.
When the container under test is open, the gas pressure is atmospheric pressure. The negative pressure chamber of the differential pressure gauge can be vented to the atmosphere. It is known that the pressure gauge can also be used to measure the liquid level at this time.
If the container is closed, you need to connect the negative pressure chamber of the differential pressure gauge to the gas phase of the container.
Pressure level transmitter is good for level measurement. Most of the time, we use submersible hydrostatic level sensor for the level measurement. When you can not use the probe of hydrostatic level sensor, you can try with this pressure level transmitter. Pressure level transmitter, is one type of DP level measure instrument, with the diaphragm.
SMT3151LT Differential pressure (DP) level transmitter a new type of differential pressure (DP) transmitter produced by advanced technology and equipment. Continuous level, flow and differential pressure measurement. Liquid level measurement, is the most common measurement process in continuous production processes, such as: petroleum and chemical industry. The liquid level measuring instrument currently widely used, is the differential pressure level transmitter.
Remote Diaphragm seal pressure transmitter with capillary is used as a level transmitter. Diaphragm Seals also called chemical seals, are used in applications where pressure sensor requires isolation from the process media. These applications are corrosive, high temperature, clogged. Or must sanitary fluids to remain in the pipeline or container. The pressure of the liquid in the process does not affect the pressure sensor. Instead, it is applied to the remote seal. And through the capillary, hydraulic pressure is transmitted to the pressure sensor. Installing and filling the diaphragm seal, the impact on instrument performance will be minimized. More
What is remote seal for level transmitter?
Remote seals are commonly used to protect pressure-measuring instruments including pressure gauges, pressure transmitters, and switches from hot, viscous, contaminated, or corrosive media. As a result, they’re often used in refining, petrochemical, and chemical plants. More Remote Diaphragm Seal System Pressure Transmitters
What is differential pressure transmitter working principle?
The basic principle of a differential pressure transmitter is to divide a space into two chambers with sensitive elements. When introducing pressure into the two chambers respectively. The sensor produces displacement (or displacement trend) under the combined action of the two pressures. This displacement is proportional to the pressure difference (differential pressure) between the two chambers. Convert this displacement into a standard signal output that can reflect the magnitude of the differential pressure. A differential pressure transmitter is a transmitter that measures the pressure difference between the two ends of the transmitter. Output standard signals (such as 4 ~ 20mA, 0 ~ 5V). Differential pressure transmitters are different from general pressure transmitters in that they have two pressure interfaces. Differential pressure transmitters are generally divided into positive pressure end and negative pressure end. In general, the pressure at the positive pressure end of the differential pressure transmitter should be greater than the pressure in the negative pressure section to measure. Extended Reading: Liquid pressure sensor
What is diaphragm seal pressure transmitter?
Diaphragm seal pressure transmitter with flange direct mount is good for level measurement. Diaphragm seals, also known as chemical seals or flush seals. Diaphragm seals work with pressure transmitter, pressure gauges. To prevent process medium from entering into the pressure-sensing assembly. So, Diaphragm seal systems protect pressure transmitters from hot, viscous, contaminated or corrosive media. Diaphragm seal connection can work with the capillary, flange and manufold. Like remote seal pressure transmitter, DP level transmitter. More
Extended Diaphragm Seal DP Level Transmitter Extended Diaphragm Seal DP Transmitter is a level transmitter direct mounted on pipe or tank. The isolation diaphragm is in direct contact with the liquid medium.
Flange Mounted Differential Pressure Transmitter Flange Mounted Differential Pressure Transmitter is also called single flange DP level transmitter. For liquid, gas or vapor pressure measurement.
Remote Diaphragm Seal Pressure Transmitter Remote seal pressure transmitter, with capillary and diaphragm seal, remote mount. Diaphragm seal systems protect pressure transmitters from hot, viscous, contaminated or corrosive media.
Sino-Instrument offers Remote Seal Differential Pressure Transmitters. A wide variety of Remote Seal Differential Pressure Transmitter options are available to you. Such as free samples, paid samples. Sino-Instrument is a globally recognized manufacturer of Pressure sensors, located in China. Sino-Instrument sells through a mature distribution network that reaches all 30 countries worldwide. Remote Seal Differential Pressure Transmitter 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.
Extended Diaphragm Seal DP Transmitter is a level transmitter direct mounted on pipe or tank. The isolation diaphragm is in direct contact with the liquid medium.
Extended Diaphragm Seal DP Level Transmitter is a field level transmitter that is directly mounted on a pipe or container. The isolation diaphragm is in direct contact with the liquid medium. There is no need to lead out the positive pressure side with a pressure pipe. Therefore, it can measure the liquid level, pressure and density of high temperature, high viscosity, easy crystallization, easy precipitation and strong corrosion. Convert to 4 ～ 20mA. DC signal output.
The flanges are made of high-quality stainless steel materials such as 304 and 316. Wetted diaphragms are made of imported high-quality anti-corrosive materials such as 316L, Hastelloy C-276, Monel, and tantalum.
Sino-Inst offers a variety of DP pressure transmitters for industrial pressure measurement. Connection with diaphragm seals. If you have any questions, please contact our sales engineers.
Features of Extended Diaphragm Seal Differential Pressure Transmitter
Simple structure: There are no movable or elastic elements. Therefore, the reliability is extremely high. The amount of maintenance is very small.
Easy installation: The built-in structure especially shows this feature. No special tools are required.
Convenient adjustment: The two potentiometers of zero position and range can carry out zero point migration or range change at will within the effective range of liquid level detection. The two adjustments do not affect each other.
Widely used: Suitable for liquid level measurement of high temperature and high pressure, strong corrosion and other media.
Specifications of Extended Diaphragm Seal Level Transmitter
Measuring range:
can be customized within the range of -4-4MPa (-10-10KPa, 0-50KPa, etc.)
Output signal:
4 ～ 20MA.DC two-wire system (analog). Two-wire system 4 ～ 20mA DC signal is superimposed with digital signal. Linear or square root output is selected by the user. (Smart)
Power supply:
12 ～ 45V.DC
Range ratio:
10: 1 or 100 to 1
Power supply impact:
<0.005% output range / V
Load effect:
When the power supply is stable, there is no load effect.
Measurement accuracy:
0.1% of the calibration range. Standard accuracy is 0.2%. If other accuracy is selected, please indicate when ordering and selecting.
Resistance:
usually adjustable between 0.1 to 16 seconds. When filling with inert liquid or with a remote transmission device, the time constant will increase.
Applications of Extended Diaphragm Seal DP Level Transmitter
Extended Diaphragm Seal DP Transmitter can measure the liquid level, pressure and density of high temperature, high viscosity, easy crystallization, easy precipitation and strong corrosion and other media. Then convert it to 4-20mA. DC signal output
Mainly used for measurement in the following occasions:
Viscous medium at high temperature.
Easily crystallized medium.
Precipitated media with solid particles or suspended matter.
Strongly corrosive or highly toxic media.
It can eliminate the leakage of the pressure guiding pipe and pollute the surrounding environment. When the isolation liquid is used, the tedious work of frequently replenishing the isolation liquid due to the unstable measurement signal can be avoided.
Continuously and accurately measure the interface and density.
The remote transmission device can avoid the mixing of different instantaneous media, so that the measurement results truly reflect the actual situation of process changes.
Hygiene and cleaning requirements are high.
For example, in the production of food, beverage and pharmaceutical industries, not only the location of the transmitter in contact with the media must meet hygienic standards, but it should be easy to rinse.
Diaphragm seals are used for the protection of pressure measuring instruments in applications with difficult media. In diaphragm seal systems, the diaphragm of the diaphragm seal affects the separation of the instrument and the medium.
The pressure is transmitted to the measuring instrument via the system fill fluid which is inside the diaphragm seal system.
For the implementation of demanding customer applications, there are a wide variety of designs, materials and system fill fluids available.
Applications
Aggressive, highly viscous, crystallising or hot media
The differential pressure type liquid level gauge uses the principle that when the liquid level in the container changes, the static pressure generated by the liquid column also changes accordingly, as shown in the figure.
For closed tanks. Set the bottom pressure to P. If the pressure on the liquid surface is P3 and the liquid level height is H, then:
P = P3 + Hpg (3-11)
In the formula: p is the medium density; g is the acceleration of gravity. From the formula ((3-1 “available: △ P = P-P3 = Hpg (3-12)
Usually the density of the measured medium is known, the pressure difference △ P is proportional to the liquid level height H. The pressure difference on the side will know the measured liquid level height.
When the container under test is open, the gas pressure is atmospheric pressure. The negative pressure chamber of the differential pressure gauge can be vented to the atmosphere. It is known that the pressure gauge can also be used to measure the liquid level at this time. If the container is closed, you need to connect the negative pressure chamber of the differential pressure gauge to the gas phase of the container.
Pressure level transmitter is good for level measurement. Most of the time, we use submersible hydrostatic level sensor for the level measurement. When you can not use the probe of hydrostatic level sensor, you can try with this pressure level transmitter. Pressure level transmitter, is one type of DP level measure instrument, with the diaphragm.
SMT3151LT Differential pressure (DP) level transmitter a new type of differential pressure (DP) transmitter produced by advanced technology and equipment. Continuous level, flow and differential pressure measurement. Liquid level measurement, is the most common measurement process in continuous production processes, such as: petroleum and chemical industry. The liquid level measuring instrument currently widely used, is the differential pressure level transmitter.
SMT3151DP intelligent differential pressure transmitter uses advanced microprocessor technology and digital communication technology. The basic principle of differential pressure transmitter is: divide a space with sensitive elements (multi-purpose capsule) into two chambers. Introduce pressure into the two chambers separately. The sensor produces displacement (or displacement trend) under the combined action of the two pressures. This displacement is proportional to the pressure difference (differential pressure) between the two chambers. Convert this displacement into a standard signal output that can reflect the magnitude of the differential pressure.
Comparative analysis – 7 Tank Level Measurement Sensors
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.
Piezoresistive Differential Pressure Transmitter utilizes the piezoresistive effect of semiconductor silicon materials. Realize accurate measurement of differential pressure.
Piezoresistive Differential Pressure Transmitter uses integrated all-welded differential pressure measuring elements. Silicone oil is filled between the chip and the two corrugated diaphragms. This product utilizes the piezoresistive effect of semiconductor silicon materials. To achieve the conversion of differential pressure and electrical signals. The signal output from the Wheatstone bridge on the sensitive chip has a good linear relationship with the differential pressure. Therefore, accurate measurement of the measured differential pressure can be achieved. It is suitable for differential pressure measurement of various gases and liquids in petroleum, chemical.
Current output type: maximum 800Ω; voltage output type: greater than 50KΩ
Insulation resistance:
Greater than 2000MΩ (100VDC)
Sealing grade:
IP65
Long-term stability:
0.1% FS / year
Vibration effect:
Within the mechanical vibration frequency 20Hz ～ 1000Hz, the output change is less than 0.1% FS
Electrical interface:
Hessman connector ( Support customization）
Mechanical connection (thread interface):
M20 × 1.5, G1 / 2
Dimensions
Applications
Flow measurement
Wastewater treatment
Wind Diff Pressure undermine
Water Diff Pressure at hydropower station
urban flood control and waterlogging prevention
Underwater engineering
Groundwater monitoring
Central air-conditioning terminal control
Watersaving Irrigation
Working Principle of Piezoresistive Differential Pressure Transmitter
The sensitive element of the piezoresistive differential pressure transmitter is a solid piezoresistive sensitive chip. Silicone oil is filled between the chip and the two corrugated diaphragms.
The measured differential pressure acts on the corrugated diaphragms at both ends. The differential pressure is transmitted to the sensitive chip through silicone oil. The sensitive chip is connected to the special amplifier circuit through the wire. It utilizes the piezoresistive effect of semiconductor silicon materials.
To achieve the conversion of differential pressure and electrical signals. The signal output from the Wheatstone bridge on the sensitive chip has a good linear relationship with the differential pressure.
Therefore, accurate measurement of the measured differential pressure can be achieved. It is used to measure the pressure difference of various gases and liquids. It is suitable for the measurement of differential pressure and water level difference of pipelines in petroleum and chemical industries.
The so-called piezoresistive effect refers to the phenomenon that when the semiconductor is subjected to stress, the energy band changes due to the stress, the energy of the energy valley moves, and its resistivity changes.
It was discovered by C.S Smith in the 1954 test of the resistivity and stress change characteristics of silicon and germanium. Semiconductor piezoresistive sensors have been widely used in aviation, chemical, marine, power and medical sectors.
Strain pressure sensor VS piezoresistive pressure sensor
In principle, strain-type pressure sensors are caused by changes in the geometry (length or width) of the strained material caused by external pressure (or tension). This in turn causes the resistance of the material to change. The magnitude of the external force can be measured by detecting this resistance change.
Piezoresistive pressure sensors are usually semiconductor pressure sensitive materials. After the semiconductor piezoresistive sensor is subjected to external forces, its own geometry hardly changes. Instead, its lattice parameters change, affecting the width of the forbidden band. Even a very small change in the width of the forbidden band will cause a large change in carrier density. This eventually causes the resistivity of the material to change.
It can be seen that although both materials exhibit changes in resistance to changes in external force, the principles are different. In addition, the sensitivity of strain-type materials to external forces is much lower than that of semiconductor piezoresistive materials.
The sensitivity of the latter is about 100 times that of the former. The characteristics of strained materials are less affected by temperature. Semiconductor piezoresistive materials are sensitive to temperature.
Piezoresistive pressure sensor advantages and disadvantages
Advantages of piezoresistive pressure sensor:
High frequency response, f0 can reach 1.5M;
Small size and low power consumption;
High sensitivity, good accuracy, can measure to 0.1% accuracy;
No moving parts (the sensitive element is integrated with the conversion element).
Disadvantages of piezoresistive pressure sensor:
Poor temperature characteristics;
The process is complicated.
Techincal Support
Capacitive mems pressure sensor
A MEMS pressure sensor is a thin-film element. It deforms when subjected to pressure, and it can be measured using a strain gauge (piezoresistive sensing). It can also be measured by capacitively sensing the change in the distance between the two surfaces.
Capacitive pressure sensor is a pressure sensor that uses a capacitive sensing element to convert the measured pressure into an electrical output with a certain relationship. The characteristics are: low input energy, high dynamic response, small natural effect, good environmental adaptability.
Capacitive differential pressure sensor
Capacitive differential pressure sensor is filled with silicone oil in the left and right chambers of the measuring diaphragm. When the left and right isolation diaphragms are subjected to high pressure pH and low pressure pL respectively, the incompressibility and fluidity of the silicone oil can transmit the differential pressure Δp = pH-pL Measure the left and right sides of the diaphragm.
Because the measuring diaphragm is pre-tensioned before welding, it is very flat when the differential pressure Δp = 0. It makes the capacitances of the two capacitors on the left and right sides of the fixed plate are completely equal. That is, CH = CL. When there is a differential pressure effect, the measuring diaphragm deforms. That is, the moving electrode plate approaches the low voltage electrode plate. At the same time, it moves away from the high voltage measuring electrode plate. This makes the capacitance CH = CL.
Piezoresistance pressure sensor (piezoresistance type transducer) is a kind of pressure sensor. Piezoresistive pressure sensors, also known as diffused silicon pressure sensors, refer to sensors made using the piezoresistive effect of single crystal silicon materials and integrated circuit technology. The single crystal silicon material is subjected to force. The resistivity changes. The electrical signal output proportional to the force change can be obtained through the measuring circuit. Piezoresistive sensors are used for the measurement and control of pressure, tension, pressure difference, and other physical quantities that can be transformed into changes in force. Such as liquid level, acceleration, weight, strain, flow rate, vacuum degree.
How does a piezoresistive pressure sensor work?
Working principle of piezoresistive pressure sensor: It is the resistance change when the varistor is pressed. It is amplified by the amplifier and calibrated with standard pressure. The pressure can be detected. The performance of the piezoresistive pressure sensor mainly depends on the varistor (ie varistor), the amplifier circuit, and the calibration and aging process in production.
What do piezoresistive sensors measure?
Using the semiconductor piezoresistive effect, various types of piezoresistive sensors can be designed. The piezoresistive sensor has a small volume, a relatively simple structure, and high sensitivity. It can measure micro-pressures of more than ten micropascals, with good dynamic response. Good long-term stability, low hysteresis and creep. High frequency response, easy production, and low cost. Therefore, piezoresistive sensors have been widely used in measuring pressure, differential pressure, liquid level, acceleration and flow.
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.
Sino-Instrument offers over 10 Piezoresistive Differential Pressure Transmitters. A wide variety of Piezoresistive Differential Pressure Transmitter options are available to you. Such as free samples, paid samples. Sino-Instrument is a globally recognized manufacturer of Pressure sensors, located in China. Sino-Instrument sells through a mature distribution network that reaches all 30 countries worldwide. Piezoresistive Differential Pressure Transmitter 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.
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.
Ceramic pressure sensor is a pressure sensor refined from a thick ceramic base using a refined ceramic base.
SI-338 Ceramic pressure sensor uses ceramic or diffused silicon core. All stainless steel package, small and beautiful appearance. Suitable for occasions with limited installation space. Wide range temperature compensation, high accuracy, small size, no adjustment, wide range coverage. Support OEM processing. Ceramic pressure transmitter is used in compressor, air conditioning and other pressure measurement.
Sino-Inst is a manufacturer of Ceramic Pressure Sensor in China. Committed to the manufacture, sales and engineering support of Ceramic Pressure Sensos.
The corrosion-resistant ceramic pressure transmitter has no liquid transfer. Pressure acts directly on the front surface of the ceramic diaphragm. Make the membrane slightly deformed. Thick film resistors are printed on the back of the ceramic diaphragm and connected to form a closed Wheatstone bridge.
Due to the piezoresistive effect of the varistor, the bridge generates 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 / 3.3 mV / V according to the different pressure ranges, which is compatible with strain gauge transmitters.
Through laser calibration, the transmitter has high temperature stability and time stability. The transmitter comes with temperature compensation of 0 ～ 70 ℃, and can directly contact most media.
Ceramic is a recognized material with high elasticity, corrosion resistance, wear resistance, shock resistance and vibration. The thermal stability of ceramics and its thick film resistance can make its operating temperature range as high as -40 to 135 ° C, and it has high accuracy and stability for measurement. The degree of electrical insulation is> 2kV, the output signal is strong, and the long-term stability is good.
The ceramic Diaphragm pressure sensor is a ceramic piezoresistive pressure sensor refined by a thick ceramic process using a refined ceramic base. Overall dimension Φ18mm * 6.35mm. Ceramic is a recognized material with high elasticity, corrosion resistance, wear resistance, impact resistance and vibration.
The good thermal stability of the ceramic and the high-temperature sintering process of the thick film make the working temperature range of the ceramic pressure sensor up to -40 ~ 125 ℃. The ceramic’s high elasticity and creep resistance make the ceramic pressure sensor have good long-term stability. In addition, the corrosion resistance of ceramics makes it uniquely advantageous in the fields of refrigeration, chemicals and environmental protection.
Sensor characteristics
● Ceramic overload sensitive diaphragm ● Zero point, full range laser calibration ● Excellent anti-corrosion and anti-wear performance ● Anti-shock and anti-vibration ● High precision and high stability ● Wide operating temperature range ● Small size and easy packaging ● Environmental protection
Ceramic Capacitive Pressure Sensor
Ceramic capacitive sensors use the most advanced ceramic technology, thick film electronic technology, and SMT technology.
Compared with other current capacitive sensors, the ceramic capacitive sensor uses a dry ceramic capacitive sensor without intermediary liquid, thus obtaining superior technical performance.
High stability, better than 0.10oF “S. every year
The temperature drift is small, ± 0.150o / lOK.
It has strong anti-overload and impact capability, and the overload can reach several times to one hundred times of the measuring range. Even if the measuring element is directly hit with a hard object, it will not be damaged.
It can be applied to medium measurement in various occasions in many industries.
Piezoresistive Pressure Sensor
The piezoresistive pressure sensor is constructed using the piezoresistive effect of single crystal silicon. A single crystal silicon wafer is used as an elastic element, and an integrated circuit process is used on the single crystal silicon membrane. A group of equivalent resistors are diffused in a specific direction of the single crystal silicon, and the resistors are connected into a bridge circuit. The single crystal silicon wafer is placed on Sensor cavity. When the pressure changes, the single crystal silicon produces strain, so that the strain resistance directly diffused thereon changes proportional to the measured pressure. Then the bridge circuit obtains the corresponding voltage output signal.
Low-Pressure Transducer
Combined Pressure and Temperature Sensor-Dual function
The ceramic pressure sensor is mainly composed of three parts: ceramic ring, ceramic diaphragm and ceramic cover.
The ceramic diaphragm is used as a sensitive elastomer. It is made of 95% AL2O3 porcelain. It is required to be flat, uniform and dense, and its thickness and effective radius depend on the design range.
The ceramic ring is formed by hot die casting process at high temperature.
High temperature glass paste is used between the ceramic diaphragm and the ceramic ring. They are fired together by thick film printing and thermal firing techniques to create a force-sensitive cup-shaped elastomer with a perimeter support. That is, a rigid structure without creep should be produced in the peripheral fixed part of the ceramic.
On the upper surface of the ceramic diaphragm, that is, the bottom of the porcelain cup and tea set, the circuit of the sensor is made by thick film technology.
The circular groove in the lower part of the ceramic cover creates a corresponding gap between the cover and the diaphragm. Limits prevent rupture of the diaphragm due to excessive bending when overloaded, resulting in overload protection of the sensor.
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.
The most widely used pressure sensors are: Diffused silicon piezoresistive pressure sensor, Ceramic Piezoresistive Pressure Sensors, sputtered thin film pressure sensor, capacitive pressure sensor, High temperature sapphire pressure sensor. But the most widely used is the piezoresistive pressure sensor. It has a very low price and high accuracy and better linearity characteristics.
A pressure sensor works by converting pressure into an analogue 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.
The Hydrostatic Pressure Transmitter measures the hydrostatic pressure exerted by a hydrostatic head. Use these hydrostatic pressure transmitters to measure…
An Air pressure transducer is a sensor that converts the mechanical signal of air pressure into a current signal. Pressure…
Sino-Inst offers Ceramic Pressure Sensors. A wide variety of Ceramic Pressure Sensors options are available to you. Such as free samples, paid samples. Sino-Inst is a globally recognized manufacturer of Ceramic Pressure Sensors, located in China. Sino-Inst sells through a mature distribution network that reaches all 30 countries worldwide. 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.
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.
