Category Archives: Pressure

Pressure Transducers and Transmitters Manfacturer, China

 
A pressure transducer also called a pressure transmitter,
is a transducer that converts pressure into an analog electrical signal.
Pressure transmitters are used to measure the pressure,
or level of industrial liquids and gases.
The output is transmitted to a control system.
Accurate and stable process measurements ensure the safe,
reliable, and profitable operation of your plant.
Sino-Instrument is pressure transmitters manufacturer in China.
We offer all types of pressure transmitters.
Like Direct Mounted, flange-mounted, single flange,
double flange, Remote Diaphragm Seals, High Static, Digital Remote.
Most of our pressure transmitters are used in oil, liquids,
and other process variables.
Pressure transducers are generally available with three types of electrical output;
millivolt, amplified voltage, and 4-20mA.

4-20 mA Output Pressure Transducers

These types of transducers are also known as pressure transmitters,
work with HART communicators.
Since a 4-20mA signal is least affected by electrical noise,
and resistance in the signal wires,
these transducers are best used when the signal must be transmitted long distances.
It is not uncommon to use these transducers in applications where the lead wire must be 1000 feet or more.
Choose the right pressure transducer for your application:

SI-702 High Pressure Sensor

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High pressure sensor is pressure transmitter designed for high pressure measure&control. 0 ～ 40MPa… 600MPa.

SI-702 High Pressure Sensor

High pressure sensor elastic body adopts special material and integrated structure design. SI-702 high pressure sensor has no burst phenomenon during high voltage measurement and control. The high pressure sensor is used under high pressure, differential high pressure and high pressure shock conditions. High pressure sensors are suitable for pressure measurement & control of large hydraulic equipment. SI-702 high pressure sensor adopts spherical or cone seal to ensure the tightness of high voltage system. Such sensor also referred to as: high pressure pressure sensor, high pressure transmitter.

Sino-Inst offers a variety of High Pressure sensors for industrial pressure measurement. If you have any questions, please contact our sales engineers.

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More Pressure Sensors

More High Pressure Sensors:

Combined Pressure and Temperature Sensor-Dual function
High Temperature Pressure Sensor
Melt Pressure Sensors/Transducers – High Temperature
Gas Pressure Sensor
Flush diaphragm pressure sensor
Digital Pressure Sensor
Sanitary Pressure Transmitter
Pressure Transducer 4-20mA/Voltage

Features of SI-702 High Pressure Sensor

  • Adopt resistance strain gauge pressure sensor chip. The selected patch technology has zero point, full scale compensation and temperature compensation;
  • High precision and high stability amplifier integrated circuit;
  • Micro-mechanical processing technology, integrated structure of measuring diaphragm and pressure interface. Impact resistance, fatigue resistance, high reliability;
  • Integrated design product will not rupture under pressure of 1100MPA, ensuring product safety
  • Diversified output signals (general-purpose analog output, digital RS485 / RS232 output, GPRS wireless transmission);
  • Small structure, minimum outer diameter can reach 26mm. Can be directly matched with local display meter (output is 4-20mA two-wire system);
  • Thread interface adopts 7 degree cone sealing surface;

Specifications of SI-702 High Pressure Sensor

Pressure typeGauge/ AbsolutePressure range 0-80，100，150，200，250，300MPa, …600MPa.
Precision ±0.1%FS   ±0.3%FS   ±0.5%FSZero temperature drift ±0.02%FS/℃
Sensitivity temperature drift ±0.02%FS/℃Long-term stability (1 year) ±0.1%FS
Response frequency (-3dB) 3.2KHzTemperature compensation -20~+85℃
Operating temperature -40~+125℃Storage temperature -40~+125℃
Overload pressure 150%FSDestruction pressure300% FS (limit pressure 10000bar)
Protection class IP65Material 17-4PH
Electrical connectionsDirect lead, M12 connector, Big Hessman, Little HessmanPressure connectionM20 × 1.5, G1 / 2 (others are customized according to requirements)
Signal output 4~20mA 0.5~4.5VDC
(Proportional output)		 0.5~4.5VDC 0~5VDC 0-10VDC
Signal cable specifications 2 Wire 3 Wire 3 Wire 3 Wire 3 Wire
Supply voltage 9~30VDC 5VDC 9~30VDC 9~30VDC 15~30VDC

Extended reading: High Pressure Flow Meters for Liquids-Steam-Gas

Applications of SI-702 High Pressure Sensor

  • Pressure measurement of large hydraulic machinery and hydraulic stations;
  • Pressure measurement and control of water jet cutter and ceramic wire cutter;
  • Pressure measurement of high pressure water pump and high pressure oil pump;
  • Supporting heavy equipment
  • high pressure
  • High load
  • High impact
  • Frequently overloaded areas

Extended Reading: Digital Pressure Sensor-RS485

Dimensions of High pressure sensors

What is High Pressure Sensor?

High pressure transducer is a pressure transmitter suitable for high pressure measurement and co

A high pressure sensor is a device for high pressure measurement of gases or liquids. A high pressure sensor usually acts as a transducer; it generates a signal as a function of the pressure imposed. Such a signal is electrical 4-20mA， 0-5V，etc.

High Pressure sensors are used for control and monitoring in thousands of everyday applications. High Pressure sensors can also be used to indirectly measure other variables such as fluid/gas flow, speed, water level, and altitude. High Pressure sensors can alternatively be called High pressure transducers, High pressure transmitters, High pressure senders, High pressure indicators, piezometers and manometers, among other names.

Sino-Inst high pressure sensor has gone through thousands of fatigue impact tests and several days of low and medium temperature aging cycles before leaving the factory. It has solved the disadvantages of high pressure sensors in terms of stress and zero instability. Provide customers with reliable products for high voltage measurement. The pressure of SI-702 series can reach 600MPa. The precision level is high, and the mature production technology can ensure the long-term stability of the sensor with excellent characteristics. SI-702 series pressure sensors are suitable for oil extraction platforms, water flow equipment, high pressure measurement equipment, hydraulic control systems, test benches and industrial automation control.

You may like: How does a pressure transmitter work?

Technical Support

High Temperature Pressure Sensor

High Temperature Pressure Sensor with high temperature resistant pressure core or sapphire core as pressure measurement material. After high reliability amplifier circuit and precise temperature compensation. The absolute or gauge pressure of the measured medium is converted into standard electrical signals such as 4 ~ 20mA, 0 ~ 5VDC, 0 ~ 10VDC. It is also widely used in industry. Collect pressure signals at the points of some high-temperature steam and fluid pipes.

How do you use a pressure sensor?

1. The key points in the use of pressure sensors and the correct installation position of the transmitter on the process pipeline are related to the measured medium. Only by mastering the correct use of the pressure sensor can the best measurement results be obtained!

2. Prevent the transmitter from coming into contact with corrosive or hot media.

3. Prevent dross from depositing in the duct.

4. When measuring liquid pressure, the pressure taking port should be opened on the side of the process pipeline to avoid sedimentation.

5. When measuring the gas pressure, the pressure taking port should be opened at the top of the process pipeline. The transmitter should also be installed at the top of the process pipeline so that the accumulated liquid can be easily injected into the process pipeline.

6. The pressure guiding tube should be installed in a place with small temperature fluctuations.

7. When measuring steam or other high-temperature media, a condenser such as a buffer tube (coil) must be connected. The transmitter’s operating temperature should not exceed the limit.

Q&A

What is pressure sensor and how it works?

A pressure sensor is a device for pressure measurement of gases or liquids.  Pressure sensors can also be used to indirectly measure other variables such as fluid/gas flow, speed, water level, and altitude. Pressure sensors can alternatively be called pressure transducers, pressure transmitters, pressure senders, pressure indicators, piezometers, and manometers, among other names.
In short, a pressure sensor converts pressure into a small electrical signal, which is sent and displayed. Therefore, these are also commonly referred to as pressure transmitters. Two common signals used are 4 to 20 mA signals and 0 to 5-volt signals.
Most pressure sensors work using the piezoelectric effect. This is when the material generates a charge in response to stress. This stress is usually compressive, but may be twisted, bent, or vibrated.
Pressure sensors detect pressure and can determine the amount of pressure by measuring the charge.
The pressure sensor needs to be calibrated in order to know what voltage or milliamp (mA) signal corresponds to what pressure. This is the basic “zero” and “span” calibration or minimum and maximum, which is a common job for maintenance personnel.
Read more about: What is a pressure sensor and how it works? 

What does a barometric pressure sensor do?

Air pressure sensor is an instrument used to measure the absolute pressure of gas. Air pressure sensor is mainly suitable for physical experiments related to gas pressure. It can also measure dry, non-corrosive gas pressure in biological and chemical experiments.
The main sensing element of the air pressure sensor of the air compressor is a thin film that is sensitive to the pressure of the air pressure and a thimble opening control. In the circuit, it is connected with a flexible resistor. When the pressure of the measured gas decreases or increases, the thin film deforms to drive the ejector pin, and the resistance of the resistor will change. The resistance of the resistor changes. The signal voltage of 0-5V is obtained from the sensing element, and is received by the data collector after A / D conversion, and then the data collector transmits the result to the computer in an appropriate form.
The main component of many air pressure sensors is a variable-capacitance silicon capsule. When the external atmospheric pressure of the variable-capacitance silicon membrane box changes, the thimble moves, and the single crystal silicon membrane box elastically deforms with it, thereby causing a change in the capacitance of the parallel plate capacitor of the silicon membrane box to control the air pressure sensor.
More about Gas Pressure Sensor.

What are pressure sensors made of?

The pressure sensor is a device that detects pressure and converts the pressure signal into an electrical signal and outputs it linearly. Common types include strain gauge, piezoresistive, capacitive, piezoelectric, and vibration frequency pressure sensors.
We use strain gauge pressure sensors as an introduction. It is mainly composed of 4 parts: elastomer, strain gauge, measuring circuit and transmission cable.
Strain gauge pressure sensor measurement principle: When the pressure sensor elastic body is deformed under the action of external force. The strain gauge attached to the elastic body then bends. The resistance of the strain gauge changes. Then the measurement circuit converts the change in resistance into an electrical signal (usually a millivolt signal).
Elastomer: Elastomer is the pressure sensor shell. The main materials are aluminum alloy, alloy steel and stainless steel.
Strain gauge: The strain gauge pressure is an important part of the sensor. Commonly used strain gauge base material adopts polymer film material. The strained material is usually high-purity constantan. The strain gauge is attached to the elastic body through dehydration. The elastic body is deformed by force. The strain gauge then deforms. Thereby changing the resistance value.
Measurement circuit: Transform the resistance change of the strain gauge into a millivolt signal output through the Wheatstone bridge.
Transmission cable: 4-core shielded cable with four wires of red, black, green and white. Red: Power +. Black: Power-. Green: signal +. White: Signal-.

What is the difference between pressure switch and pressure sensor?

Pressure Switch:
As the name suggests, a pressure switch is a switch. It’s just that this switch is the pressure set in advance. When the measured medium reaches this pressure level, the switch can automatically turn on or off. The pressure switch must be given a pressure value in advance. Then turn the switch on or off. They are used for simple control and are all digital outputs.
Pressure Sensor:
The pressure sensor can output not only analog signals but also digital signals. Digital signal processing is more convenient, and remote transmission is also possible. The pressure sensor is composed of a pressure sensitive element and a conversion circuit. Use the pressure of the measured medium to produce a small change in current or voltage output on the pressure sensitive element.

Sino-Inst offers High pressure sensors. A wide variety of High Pressure sensors options are available to you. Such as free samples, paid samples. Sino-Instrument is a globally recognized manufacturer of High 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.

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SI-503K Gas Pressure Transducer

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Gas Pressure Transducer for industrial gas pressure measurement. Pagoda gas nozzle Φ8. It is used to measure the pressure of weak corrosive gases such as natural gas and exhaust gas pressure sensor.

SI-503K Pagoda Joint Gas Pressure Transducer uses stainless steel as a whole. High-precision strain gage and advanced technology. It has high sensitivity, stable performance and good impact resistance. GB 304 stainless steel welding. Small and compact structure. Has good moisture resistance and excellent media compatibility. Can measure weakly corrosive liquids and gases.Widely used in industrial equipment: Water conservancy. Chemical, medical. Electric power, air conditioning. Vehicle braking and other pressure measurement and control.

Sino-Inst offers a variety of Gas Pressure Transducers for industrial pressure measurement. If you have any questions, please contact our sales engineers.

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Features of SI-503K Gas Pressure Transducer

  • High sensitivity and stable performance
  • Compact and compact
  • Good impact resistance
  • Excellent media compatibility
  • Pagoda gas nozzle Φ8, quick connector

Specifications of SI-503K Gas Pressure Sensor

  • Measuring range: -100KPa ~ 0, ～ 0 ～ 1 ～ 10MPa
  • Comprehensive accuracy: 0.25% FS, 0.5% FS
  • Output signal: 4 ～ 20mA (two-wire system), 0-5 / 1-5 / 0-10V (three-wire system)
  • Power supply voltage: 24DCV (9 ～ 36DCV)
  • Medium temperature: -20 ～ 85 ～ 105 ℃
  • Ambient temperature: normal temperature (-20 ～ 85 ℃)
  • Load resistance: current output type: max. 800Ω; voltage output type: greater than 50KΩ
  • Insulation resistance: more than 2000MΩ (100VDC)
  • Response time: <1ms
  • Sealing grade: IP65
  • Long-term stable performance: 0.1% FS / year
  • Impact of vibration: within the frequency of mechanical vibration 20Hz ～ 1000Hz, the output change is less than 0.1% FS
  • Electrical interface: Hessman connector (optional)
  • Threaded connection: Pagoda nozzle Φ8, quick connector

Dimensions

Wiring

Gas pressure transducer is a special sensor that converts gas pressure into current and voltage signals.

For gas pressure measurement the solution of pressure sensor is used to accomplish the significance of measurement.

Pressure sensors for gas pressure measurement are mainly conversion devices used to measure the absolute pressure of gases.

It can be used for pressure measurement in terms of blood pressure, wind pressure, pipeline gas, etc. It has a stable and reliable performance.

It is mainly suitable for physical experiments related to gas pressure. Such as gas laws, etc. It can also be used in biological and chemical experiments to measure the pressure of dry, non-corrosive gases.

Read more about: What is a pressure sensor and how it works? 

How does gas pressure sensor work?

In short, a pressure sensor converts pressure into a small electrical signal, which is sent and displayed. Therefore, these are also commonly referred to as pressure transmitters. Two common signals used are 4 to 20 mA signals and 0 to 5 volt signals.
Most pressure sensors work using the piezoelectric effect. This is when the material generates a charge in response to stress. This stress is usually compressive, but may be twisted, bent, or vibrated.

Pressure sensors detect pressure and can determine the amount of pressure by measuring the charge.

The pressure sensor needs to be calibrated in order to know what voltage or milliamp (mA) signal corresponds to what pressure. This is the basic “zero” and “span” calibration or minimum and maximum, which is a common job for maintenance personnel.

Read more about: What is a pressure sensor and how it works? 

The price of gas pressure Transducers is mainly affected by the following factors:

  1. Measuring medium
  2. Does the gas contain particles?
  3. Gas temperature
  4. Gas corrosive
  5. Explosion-proof performance
  6. Interface size
  7. Signal output, etc.

Gas pressure Transducer price reference range: USD80-800.00/pc

Natural gas pressure Transducer is 4-20mA current output sensors for monitoring the pressure of natural gas. Measure very low inlet and output pressure or very high natural gas bottle pressures. Where there is the potential for natural gas to be present in the local atmosphere, special approval options such as ATEX intrinsic safety are available.

What pressure sensor is used on the natural gas pipeline?

  1. Natural gas pipelines are pipelines that transport natural gas (including associated gas produced in oil fields) from mining sites or treatment plants to urban gas distribution centers or industrial enterprise users, also known as gas pipelines.
    Using natural gas pipelines to transport natural gas is the only way to transport large amounts of natural gas on land. Natural gas pipelines account for about half of the total pipeline length in the world.
  2. Residential gas inlet pipes should be installed in non-residential rooms such as kitchens, corridors, and enclosed balconies connected to the kitchen (the balconies should be closed when transporting wet gas in cold areas) and other non-residential rooms that are convenient for maintenance. When it is really difficult, it can be introduced from the stairwell, but metal pipes and inlet pipe valves should be installed outdoors.
  3. The gas introduction pipes of commercial and industrial enterprises should be installed in the rooms or gas meter rooms where gas is used.
  4. The gas introduction pipe should be introduced through the wall along the ground on the outer wall. The upper bend of the outdoor exposed pipe section should be installed with no less than DN15 cleaning tee and wire plug, and treated with anti-corrosion treatment. Keep warm when transporting wet gas in cold areas. The introduction pipe can be buried into the room through the outer wall or foundation of the building. When the introduction pipe penetrates the wall or foundation and enters the building, it shall exit the indoor ground within a short distance, and shall not be laid horizontally under the indoor ground.

The sensors used to detect natural gas pipelines can be used to detect the pressure of natural gas pipelines with explosion-proof verification and regular gas pipeline pressure sensors and gas pressure Transducers.

The air pressure sensor is used to measure the absolute pressure of the gas. It is mainly suitable for physical experiments related to gas pressure, such as gas laws, etc. It can also measure dry and non-corrosive gas pressure in biological and chemical experiments.

The air pressure sensor is mainly used to measure the pressure of the gas. One of the atmospheric pressure sensors is usually used to measure changes in weather and use the corresponding relationship between air pressure and altitude for altitude measurement.

The air pressure sensor is a detection device that can feel the measured information, and can transform the detected and felt information into electrical signals or other required forms of information output according to a certain rule to meet the needs of information transmission, processing, and Storage, display, recording and control requirements.

Pressure transmitter types include gauge pressure, absolute pressure, and differential pressure. Gauge pressure refers to the pressure that is less than or greater than atmospheric pressure based on the atmosphere. Absolute pressure refers to the absolute zero pressure as the reference and is higher than the absolute pressure. Differential pressure refers to the difference between two pressures.

According to the working principle of the pressure transmitter:

  • Strain Gauge Pressure Transducers
  • Capacitance Pressure Transducers
  • Potentiometric Pressure Transducers
  • Resonant Wire Pressure Transducers

Read more about: What is industrial pressure transmitter?

Gas pressure Transducer is mainly used to measure the absolute pressure of gas conversion device. It can be used for pressure measurement of blood pressure, wind pressure, pipeline gas, etc. Its performance is stable and reliable, and it is mainly suitable for physical experiments related to gas pressure, such as gas laws. It can also measure the pressure of dry, non-corrosive gases in biological and chemical experiments.

Technical Support

Precision Gauge Pressure Transmitter for the Process Industry. With HART®-Communication and SIL2 (optionally) .

The Gauge Pressure Transmitter SMT3151 TGP, has been specially designed for the process industry, and measures vacuum, gauge and absolute pressure ranges of gases, steam, fluids, and dust up to 600 bar.

Flush diaphragm pressure sensor has Flush membrane / diaphragm structure, anti-blocking design. Pressure measurement of viscous media.

Flush diaphragm pressure sensor uses a diaphragm isolation process. Feel the pressure directly with a flat membrane. There is no pressure hole in the test head. There is no clogging of viscous media during the measurement. 

Are you taking industrial gas measurements? Maybe you need industrial gas flow measurement.

Steam Pressure Transmitter

Steam pressure transmitters are widely used in the measurement and control of various high-temperature steam piping…

Cryogenic Pressure Transducers

Cryogenic pressure transducer for low temperature pressure measurement.  -196℃～+125℃、-260℃/-350c（especial）. Sino-Inst offers a variety of Pressure Sensors…

Q&A

What is pressure transducer used for?

The main function of a pressure transmitter is to transmit pressure signals to electronic equipment. The pressure is then displayed on the computer. For example, the mechanical signal of water pressure is converted into an electronic signal such as voltage or current (usually 0-5V or 4-20mA). Pressure and voltage or current have a linear relationship. It is generally proportional, so the voltage or current output by the transmitter increases with increasing pressure.
A pressure transmitter is a sensor commonly used in industrial practice. It is widely used in various industrial automatic control environments. Involving water conservancy and hydropower, railway transportation, intelligent buildings, production control, aerospace, military industry, petrochemicals, oil wells, electric power, ships, machine tools, pipelines and many other industries. The pressure transmitter workshop must be in direct contact with the measured medium. Often run in high temperature, low temperature, corrosion, vibration, shock and other environments. Whether it works normally on the job site depends not only on the quality of the product. It also depends on optimized engineering design and reasonable model configuration. And proper installation and maintenance. Pressure transmitters are a key element in the fluid industry.
Pressure transmitters are mainly used in the following areas:
1.Petroleum, petrochemical, chemical industry, supporting with throttling devices. Provides accurate flow measurement and control. Measures pressure and level in pipes and tanks.
2.Electric power, city gas, and other companies. Places requiring high stability and high accuracy measurement.
3.Pulp and papermaking are used in places that require chemical-resistant liquids and corrosion-resistant liquids.
4. Steel, non-ferrous metals, ceramics, used in furnace pressure measurement and other places requiring high stability, high precision measurement and other places. It is used in places where stable measurement is required under strict control (temperature, humidity, etc.).
5. Machinery and shipbuilding, used to strictly control the place where high precision is required for stable measurement.
In general, the pressure transmitter is mainly used to measure the pressure of the medium and the liquid level.

Sino-Inst is Chinese manufacturer of Gas pressure Transducers for industrial gas pressure measurement.

Gas pressure Transducer for industrial gas pressure measurement which are widely used in India, US, South Africa, and other countries.

Contact us any time, if you need the quotation or technical support.

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SI-703 Flush Diaphragm Pressure Sensor

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Flush diaphragm pressure sensor is also called flush diaphragm pressure transducer or flush diaphragm pressure transmitter. Flush diaphragm pressure sensor has Flush membrane / diaphragm structure, anti-blocking design. Pressure measurement of viscous media.

Flush diaphragm pressure sensor uses a diaphragm isolation process. Feel the pressure directly with a flat membrane. There is no pressure hole in the test head. There is no clogging of viscous media during the measurement. Adopting flush membrane structure, diffused silicon pressure-sensitive core body, with good moisture resistance and excellent media compatibility. The sensor interface is available in clamp, thread and flange options. The output signal can be selected from voltage, current, and so on. The flush diaphragm of the sensor prevents problems such as scaling, unsanitary and clogging of viscous liquids.

Sino-Inst offers a variety of Flush diaphragm pressure sensors for industrial pressure measurement. If you have any questions, please contact our sales engineers.

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More Pressure Sensors

This type of pressure sensor is also commonly known as: Flat film pressure sensor. Diaphragm pressure transmitter. Paint pressure sensor. Food pressure sensor. Diaphragm pressure sensor. Diaphragm pressure transmitter. Or sanitary pressure transmitter.

Flush diaphragm pressure sensor, including strain type and diffused silicon front type.

The strain-type flush-membrane measuring end adopts a special, sturdy flush diaphragm. Hard particles in the measured medium will not damage the isolating diaphragm. Compact structure, corrosion resistance, anti-vibration, anti-particle impact, wide temperature compensation.

Diffusion silicon front type is made of imported diffusion silicon core. Use calibration and digital compensation technology. The product has reliable performance and stable output.

You may like: Diaphragm pressure gauge

Features of SI-703 Flush diaphragm pressure sensor

  • The imported resistance strain gauge is used as a pressure-sensitive chip. The anti-blocking design of the flush membrane / diaphragm structure can measure viscous media.  
  • Advanced patch technology and process; 
  • It can bear large impact pressure, and the bearing pressure can reach 100MPa; 
  • The temperature drift is small, and it can work stably at the working temperature of -20 ~ 85 ℃ for a long time;
  • The elastomer is also connected to the joint using a fully sealed or integrated structure. Solve the oil / gas shortcomings of diffused silicon and ceramic core pressure sensor cores. Reliable work and high fatigue strength;
  • It is specially designed for OEM processing of pressure transmitter manufacturers. Low cost. Suitable for mass production;

Specifications of SI-703 Flush diaphragm pressure sensors

Model703 Flush diaphragm pressure transmitter
Range0-0.6,1,5,10,20,30,40,50 ～ 200MPa
Comprehensive accuracy0.1% FS, 0.2% FS, 0.5% FS
Output signal4-20mA (two-wire system), 0-5 / 1-5 / 0-10VDC (three-wire system)
Supply voltage24VDC (10-30VDC)
Medium temperature-20 ～ 75 ℃
Ambient temperature-20 ～ 75 ℃
Load ResistanceCurrent output type: max. 800Ω; voltage output type: greater than 50KΩ
Insulation resistanceMore than 2000MΩ (100VDC)
Sealing levelIP65
Long-term stable performance0.1% FS / year
Vibration effectWithin the mechanical vibration frequency of 20Hz ~ 1000Hz, the output change is less than 0.1% FS
Electrical InterfaceMetal sealed terminal, four-core aviation connector
Mechanical connectionM20 × 1.5, G1 / 2-14, etc., other threads can be customized
Model703F waterproof Flush diaphragm pressure sensor
Range  0-1, 2, 4, 5, 10, 20, 30, 40, 50 to 200 MPa
Comprehensive accuracy0.2% FS, 0.5% FS, 1.0% FS
Output signal4-20mA (two-wire system), 0-5 / 1-5 / 0-10VDC (three-wire system)
Supply voltage24VDC (10-30VDC)
Medium temperature-20 ～ 75 ℃
Ambient temperature-20 ～ 75 ℃
Load Resistance  Current output type: max. 800Ω; voltage output type: greater than 50KΩ
Insulation resistanceMore than 2000MΩ (100VDC)
Sealing levelIP65
Long-term stable performance0.1% FS / year
Vibration effect  Within the mechanical vibration frequency of 20Hz ~ 1000Hz, the output change is less than 0.1% FS
Electrical InterfaceWaterproof outlet
Mechanical connectionM20 × 1.5, G1 / 2-14, etc., other threads can be designed according to customer requirements
Model703K Flush diaphragm pressure sensor
Range0-2,1,5,10,20,30,40,50 ～ 100MPa
Comprehensive accuracy0.1% FS, 0.2% FS, 0.5% FS
Output signal1-1.5mV / V
Supply voltage10VDC
Medium temperature-20 ～ 85 ℃
Ambient temperature-20 ～ 85 ℃
Load Resistance1500Ω
Insulation resistance  More than 2000MΩ (100VDC)
Sealing levelIP65
Long-term stable performance0.1% FS / year
Vibration effect/
Electrical InterfaceDirect outgoing
Mechanical connectionΦ19 standard size
Model703W Flush diaphragm micro pressure sensor
Range0, 1.5, 2, 10, 30, 50, 100-500KPa, 1-60MPa
Comprehensive accuracy0.25% FS, 0.5% FS
Output signal4-20mA (two-wire system), 0-5 / 1-5 / 0-10VDC (three-wire system)
Supply voltage24VDC (10-30VDC)
Medium temperature-20 ～ 65 ℃
Ambient temperatureNormal temperature (-20 ～ 65 ℃)
Load ResistanceCurrent output type: max. 800Ω; voltage output type: greater than 50KΩ
Insulation resistanceMore than 2000MΩ (100VDC)
Sealing levelIP65
Long-term stable performance0.1% FS / year
Vibration effectWithin the mechanical vibration frequency of 20Hz ~ 1000Hz, the output change is less than 0.1% FS
Electrical InterfaceHessman connector, other optional
Mechanical connectionM24 * 1.5, M25 * 1.5, M27 × 2, etc. Other threads can be designed according to customer requirements
Model703C Flush diaphragm micro pressure sensor
Range0-10, 30, 50, 100 ～ 500KPa, 1-7MPa
Comprehensive accuracy0.1% FS, 0.2% FS, 0.5% FS
Output signal4-20mA (two-wire system), 0-5 / 1-5 / 0-10VDC (three-wire system)
Supply voltage24VDC (10-30VDC)
Medium temperature-20 ～ 65 ℃
Ambient temperature-20 ～ 65 ℃
Load ResistanceCurrent output type: max. 800Ω; voltage output type: greater than 50KΩ
Insulation resistance≥2000MΩ (100VDC)
Sealing levelIP65
Long-term stable performance0.1% FS / year
Vibration effectWithin the mechanical vibration frequency of 20Hz ~ 1000Hz, the output change is less than 0.1% FS
Electrical InterfaceHessman connector, four-core aviation connector optional
Mechanical connection  M20 × 1.5, G1 / 2-14, etc.
Model703G Flush diaphragm pressure sensor
（Alternative WiKa similar products）
Range0 ～ 5, 10, 20, 50, 100-500KPa, 1-7MPa
Comprehensive accuracy0.1% FS, 0.2% FS, 0.5% FS
Output signal4-20mA (two-wire system), 0-5 / 1-5 / 0-10VDC (three-wire system)
Supply voltage24VDC (10-30VDC)
Medium temperature-20 ～ 65 ℃
Ambient temperatureNormal temperature (-20 ～ 65 ℃)
Load Resistance  Current output type: max. 800Ω; voltage output type: greater than 50KΩ
Insulation resistanceMore than 2000MΩ (100VDC)
Sealing levelIP65
Long-term stable performance0.1% FS / year
Vibration effectWithin the mechanical vibration frequency of 20Hz ~ 1000Hz, the output change is less than 0.1% FS
Electrical InterfaceHessman connector, other optional.
Mechanical connectionM20×1.5，G1/2-14
Model703GB Flush diaphragm pressure sensor （Alternative WiKa similar products）
Range  0 ～ 5,10,20,50,100KPa ～ 1MPa, 2,3,10MPa
Comprehensive accuracy0.1% FS, 0.2% FS, 0.5% FS
Output signal4-20mA (two-wire system), 0-5 / 1-5 / 0-10VDC (three-wire system)
Supply voltage24VDC (10-30VDC)
Medium temperature-20 ～ 65 ℃
Ambient temperatureNormal temperature (-20 ～ 65 ℃)
Load ResistanceCurrent output type: max. 800Ω; voltage output type: greater than 50KΩ
Insulation resistanceMore than 2000MΩ (100VDC)
Sealing levelIP65
Long-term stable performance0.1% FS / year
Vibration effectWithin the mechanical vibration frequency of 20Hz ~ 1000Hz, the output change is less than 0.1% FS
Electrical InterfaceHessman connector, other optional.
Mechanical connectionG1

Read more about: What is a pressure sensor and how it works? 

SI-703 Flush diaphragm pressure sensor Applications

The sensor’s Flush diaphragm structure prevents problems such as scaling, unsanitation, and sticky liquid clogging. Widely used in food, pharmaceutical, brewing and other process control fields. It is suitable for the pressure measurement and control of viscous media such as chemical coatings, paints, muds, asphalts, and crude oil under weak pressure. Its industry applications are as follows:

  1. Food hygiene industry;
  2. Paper industry;
  3. Sewage level measurement;
  4. Beverage tank liquid level measurement;
  5. Pipeline level measurement;
  6. Pharmaceutical and biological products processing.
  7. Pressure transmitter manufacturer OEM
  8. Pressure measurement and control of viscous media

Extended reading: Flat Pressure Sensor for High Viscosity Fluids

Flush diaphragms appear flush from the surface, so they are called flush diaphragms.

A flush diaphragm is a diaphragm that is fully open and exposed to the pressure medium. The flush diaphragm is level or slightly recessed with the surrounding surface when installed.

The purpose of the flush membrane is to prevent the viscous medium from blocking the pressure hole, or to use a special material for better measurement with the medium to avoid damage to the sensor chip material, etc.

In short, the way to measure or protect the sensor according to the specific application

Flush pressure sensor refers specifically to Pressure Sensors with Flush Diaphragms. Pressure transmitters and transducers with open flush diaphragms suitable for use with highly viscous media such as plastics, paper pulp, bitumen, sewage, paint and adhesives.

Extended Reading: MEMS Pressure Sensors

Flushing connection is different from the common internal diaphragm pressure measurement method.

Internal diaphragm is the industry standard for most gaseous and liquid media because it is inexpensive and easy to handle.

However, once it encounters the measurement of viscous media, or in the case of high hygiene requirements. Keeping the Flushing connection can effectively avoid blockage. And meet the sanitary cleaning requirements.

Flush Mount Diaphragm can be:
Clamp flat film installation, threaded flat film installation, or flange flat film installation. Sometimes there are customers who need special cavityless flat membranes.

Clamp Flush Membrane Pressure Sensor

The clamp type adopts a silicone oil filling technology, and the pressure felt by the diaphragm is transmitted to the pressure chip through the silicone oil. The compensation circuit corrects the pressure signal to a linear electrical signal.

The stressed diaphragm on the end face of the clamp is exposed to directly feel the pressure. Prevents scaling, unsanitary and sticky pressure clogging problems. It is widely used in hygiene industries such as food, medicine, brewing and other occasions where the measuring medium may be fouled.

Threaded flush membrane pressure sensor

The threaded flush Diaphragm pressure transmitter uses a flat membrane to directly sense the pressure signal. The diffusion silicon pressure core is used as the sensitive element. The standard silicone oil or olive oil is used as the pressure transmission medium.

The measuring end is made of 316L stainless steel, and the flush isolation diaphragm is specially welded. Compact structure, corrosion resistance, vibration resistance, wide temperature compensation.

Flange flush Diaphragm pressure transmitter

  • Shell optional;
  • flange mounting;
  • Two-wire system, 4～20mA analog output, HART® protocol digital communication;
  • Smart LCD head with backlight;
  • Large-size diaphragm, fully welded and sealed, long-term reliability and durability;
  • For pressure measurement of gas, liquid, steam;
  • Anti-corrosion diaphragm is optional (tantalum, Kazakhstan C, 316L, 316L sprayed with PTFE);
  • Especially suitable for high temperature viscous liquid;

Cavityless flush Diaphragm pressure transmitter

Cavityless flush Diaphragm pressure transmitter

The cavityless flush Diaphragm pressure transmitter adopts a high-precision foil strain gauge and has no cavity to measure the diaphragm. It is especially suitable for measuring liquids with high viscosity.

The product adopts an improved and optimized installation structure, which makes the product have good anti-vibration ability.

Equipped with a variety of characteristic amplifying circuits, such as anti-interference, high temperature resistance, intrinsically safe explosion-proof, etc., making the modification suitable for various measurement and control occasions such as oil fields and food.

Working Principle

Flush diaphragm pressure sensors use processes such as diffusion or ion implantation to form resistors and connect them to a Wheatstone bridge. Micro-machining technology is used to form a pressure-sensitive diaphragm under the bridge. When pressure is applied to the diaphragm, the resistance value changes and a linearized output signal is generated that is proportional to the applied pressure. When we add DC power to the Wheatstone bridge, a DC voltage signal will be output. After the second conversion line, the two-wire system 4 ~ 20MA output is realized.

When to Use a Flush Diaphragm Pressure Connection？

In short, there are two cases, we can first consider Flush Diaphragm Pressure Connection.

The first is hygienic applications. Such as Pharmaceutical, Food, Beverage & Biotech.

For these applications the concern is not necessarily high viscosity but more to do with cleanliness. The wetted part of the Flush Diaphragm Pressure Sensor is flat. No holes, no ripples. This way, residue-free cleaning is easy.

The second is High Viscosity Liquids or Crystals.

Substances such as paints, oils, waxes, pastes, tars, plastic melts or slurries can clog the process connections of the pressure sensor.

The media may be too hard to adequately fill the internal voids of the pressure connector. Or once the process cools, the substance may wax. For these types of substances, it is necessary to specify a flushing connection in which the diaphragm is fully open.

Some pressure transducers have the option of flush-embedded diaphragms where mechanical damage to the diaphragm is a concern.

WIKA has a great video on When to use a front-flush pressure connection? Let’s take a look.

Technical Support

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Static Pressure/Hydrostatic Pressure Transmitter

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What does intrinsically safe mean?

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Introduction to Piezoelectric Pressure Sensors

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Frequently
Asked
Questions

Contact Us

In short, a pressure sensor converts pressure into a small electrical signal, which is sent and displayed. Therefore, these are also commonly referred to as pressure transmitters. Two common signals used are 4 to 20 mA signals and 0 to 5 volt signals.

Most pressure sensors work using the piezoelectric effect. This is when the material generates a charge in response to stress. This stress is usually compressive, but may be twisted, bent, or vibrated.

Pressure sensors detect pressure and can determine the amount of pressure by measuring the charge.

The pressure sensor needs to be calibrated in order to know what voltage or milliamp (mA) signal corresponds to what pressure. This is the basic “zero” and “span” calibration or minimum and maximum, which is a common job for maintenance personnel.

Pressure gauge according to its measurement accuracy:

Can be divided into precision pressure gauges, general pressure gauges.
The precision level of precision pressure gauges is 0.1, 0.16, 0.25, 0.4 and 0.05.
The accuracy levels of general pressure gauges are 1.0, 1.6, 2.5, and 4.0.

Pressure gauge according to its measurement basis:

Pressure gauges are divided into: general pressure gauges, absolute pressure gauges, stainless steel pressure gauges, and differential pressure gauges according to the basis of their indicated pressure.
General pressure gauges are based on atmospheric pressure.
The absolute pressure gauge is based on the absolute zero pressure.
The differential pressure gauge measures the difference between two measured pressures.

Pressure gauge according to its measuring range:

Divided into vacuum gauges, pressure vacuum gauges, micro pressure gauges, low pressure gauges, medium pressure gauges and high pressure gauges.

Vacuum gauges are used to measure pressure values ​​below atmospheric pressure.

Pressure vacuum gauges are used to measure pressure values ​​less than and above atmospheric pressure.

Micro pressure gauges are used to measure pressure values ​​less than 60,000 Pa.

Low pressure meter is used to measure 0 ~ 6MPa pressure value.

Medium pressure gauge is used to measure the pressure value of 10 ~ 60MPa.

High pressure gauge is used to measure pressure value above 100MPa.

Pressure gauge according to its display mode:
Divided into pointer pressure gauge. Digital pressure gauge.

The pressure gauge is divided according to its use function:
Pressure gauges can be divided into local indication pressure gauges and charged signal control pressure gauges according to their different functions.

General pressure gauges, vacuum pressure gauges, shock-resistant pressure gauges, stainless steel pressure gauges, etc. are all in-situ indicating pressure gauges. They have no other control functions except the indicated pressure.

The output signals of the pressure signal-controlled pressure gauge mainly include:

1. Switching signal (such as electric contact pressure gauge)
2. Resistance signal (such as resistance remote pressure gauge)
3. Current signals (such as inductive pressure transmitters, remote pressure gauges, pressure transmitters, etc.)

According to the purpose of the pressure gauge:

It can be divided into: ordinary pressure gauge, ammonia pressure gauge, oxygen pressure gauge, electric contact pressure gauge, remote transmission pressure gauge, vibration resistance pressure gauge, pressure gauge with inspection pointer, double needle double tube or double needle single tube pressure gauge, digital display Pressure gauges. Digital precision pressure gauges.

Pressure sensors are mainly divided into two types: semiconductor piezoresistive type and electrostatic capacity type. Below we introduce their principles.

Semiconductor piezoresistance type:
The semiconductor piezoelectric impedance diffusion pressure sensor forms a semiconductor deformation pressure on the surface of the sheet. The sheet is deformed by an external force (pressure) to produce a piezoelectric impedance effect. The change in impedance is converted into an electrical signal.

Capacitance type:
The electrostatic capacitance type pressure sensor is a capacitor that opposes the fixed pole of glass and the movable pole of silicon to form a capacitance. It converts the change in electrostatic capacity generated by deforming the movable pole by external force (pressure) into an electrical signal.

A pressure sensor (Pressure Transducer) is a device or device that can sense the pressure signal and convert the pressure signal into a usable output electrical signal according to a certain rule.

At present, there are many types of core materials for pressure sensors. The performance of several core materials is briefly introduced below.
1. Single crystal silicon
2. Polysilicon
3. Silicon-Sapphire
4. Compound semiconductor materials
5. SiC thin film material

A diaphragm pressure gauge is a device,

that uses a diaphragm with a known pressure to measure pressure in a fluid.

It has many different uses, such as monitoring the pressure of a canister of gas, measuring atmospheric pressure. Or recording the strength of the vacuum in a vacuum pump.

The diaphragm pressure gauge consists of a circular membrane, made from sheet metal of precise dimensions, which can either be flat or corrugated.

The diaphragm is mechanically connected to the transmission mechanism, which will amplify the small deflections of the diaphragm, and transfer them to the pointer.

Read more about: SI-D100 Diaphragm pressure gauge

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Differential pressure(DP) level transmitter

Sino-Inst offers Flush diaphragm pressure sensors. A wide variety of Flush diaphragm Pressure sensors options are available to you. Such as free samples, paid samples. Sino-Instrument is a globally recognized manufacturer of Flush diaphragm Pressure sensors, located in China.

Sino-Inst sells through a mature distribution network that reaches all 30 countries worldwide. Flush diaphragm 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.

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Industrial Pressure Transmitters

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Industrial pressure transmitters for the process pressure measure, monitor and control application.

Industrial pressure transmitters are sensors with electrical transmission output for remote indication of pressure. Process transmitters differentiate themselves from pressure sensors through their increased range of functionality.

They feature integrated displays, offer high measuring accuracies and freely scalable measuring ranges. Communication is via digital signals, and waterproof and explosion-proof certifications are available. Through connection to diaphragm seals, they are suitable for the harshest operating conditions. Ideal for OEMs, process applications, water processing, and industrial pressure applications.

Sino-Inst offers a variety of pressure senors for industrial pressure measurement. If you have any questions, please contact our sales engineers.

CONTACT US

Featured Industrial Pressure Transmitters

Diffused silicon Gauge Pressure Transmitter
A gauge pressure (GP) transmitter compares a process pressure against local ambient air pressure. Gauge pressure transmitters have ports to sample the ambient air pressure in real-time.
Capacitive Gauge Pressure Transmitter
Gauge pressure (GP) transmitters compare process pressure with local ambient air pressure. Gauge pressure transmitters have ports for real-time sampling of ambient air pressure.
Explosion-proof Pressure Transmitter
Explosion-proof Pressure transmitter, or explosion-proof pressure transducer, with the explosion-proof enclosure.
For applications in hazardous areas.
Diaphragm Seal Pressure Transmitter
When the process medium should not come into contact with the pressured parts of the measuring instrument. Diaphragm sealed pressure transmitters are used for pressure measurement.
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.

Absolute Pressure Transmitter
Absolute pressure transmitter with 4-20mA output for measuring pressure with absolute type reference. Absolute pressure (AP) transmitter is a measure of the ideal (complete) vacuum pressure.
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 .
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-Inst also provides repair services for Industrial pressure transmitters. Such as WIKA, Rosemount, and other brands of pressure transmitters.

What is a smart pressure transmitter?

Digital smart pressure transmitter is pressure sensor with a 12-bit or higher microprocessor. Smart pressure transmitters are high performance microprocessor-based transmitters with flexibility. Pressure calibration and output, automatic compensation.

Smart pressure transmitter also called intelligent pressure transmitter.

The intelligent Industrial pressure transmitters consist of two parts: a smart sensor and a smart electronic board.

The smart sensor part includes: a capacitive sensor. A measuring diaphragm detection circuit. A temperature sensor, and a temperature compensation circuit.

The smart electronic board includes: a microcomputer controller. And the peripheral circuit, complete the pressure signal to 4 ~ 20mA dc conversion.

Smart Industrial pressure transmitter is used to measure the pressure of liquid, gas or steam. And then convert the pressure signal into 4 ～ 20mA DC signal output. The intelligent pressure transmitter produced by Sino-Inst can communicate with the HART communicator. It is widely used in weakly corrosive liquids in industrial pipelines, Gas and steam measurement and control systems.

Industrial pressure transmitters Working Principle

Principle and Application of Diffusion Silicon Pressure Transmitter

The pressure of the measured medium directly acts on the diaphragm of the sensor (stainless steel or ceramic). Causing the diaphragm to generate a micro-displacement proportional to the pressure of the medium. The resistance value of the sensor changes. The electronic circuit detects this change and converts and outputs a standard measurement signal corresponding to this pressure.

Principle of capacitive pressure transmitter

Capacitive pressure transmitter is mainly composed of capacitance sensor and circuit board. The sensor implements pressure-capacitance conversion. The circuit board converts the capacitance to a two-wire 4-20mA.

When the process pressure is applied to the isolation diaphragm from both sides (or one side) of the measuring chamber, it is transferred to the central diaphragm of the chamber through the silicone oil filling liquid. The central diaphragm is a diaphragm with tensioned edges.

Under the action of pressure, a corresponding displacement is generated. This displacement creates a change in differential capacitance!

And through the adjustment, oscillation and amplification of the electronic circuit board! Converted into 4-20mA signal output! The output current is directly proportional to the process pressure!

How Does a Pressure Transmitter Work?

Types of Pressure Transmitters

Depending on the type of pressure to be measured:

Pressure transmitter types include gauge pressure, absolute pressure, and differential pressure. Gauge pressure refers to the pressure that is less than or greater than atmospheric pressure based on the atmosphere. Absolute pressure refers to the absolute zero pressure as the reference and is higher than the absolute pressure. Differential pressure refers to the difference between two pressures.

According to the working principle of the Industrial pressure transmitters:

  • Strain Gauge Pressure Transducers
  • Capacitance Pressure Transducers
  • Potentiometric Pressure Transducers
  • Resonant Wire Pressure Transducers

Electrical Output of Pressure Transducers

Pressure transmitters are generally available with three types of electrical output. Millivolt, amplified voltage and 4-20mA. Below is a summary of the outputs and when they are best used.

Extended Reading: 4-20ma pressure transducer wiring diagram

Millivolt Output Pressure Transducers

A sensor with a millivolt output is usually the most economical pressure sensor. The output of a millivolt sensor is nominally about 30mV. The actual output is proportional to the input power or excitation of the pressure sensor. If the stimulus fluctuates, the output will change.

Because of this dependence on the level of excitation, a regulated power supply is recommended for millivolt sensors. Because the output signal is so low, the transducer should not be placed in an electrically noisy environment. The distance between the transducer and the reading instrument should also be kept relatively short.

Voltage Output Pressure Transducers

Voltage output transducers include integral signal conditioning, which provides higher output than millivolt transducers. The output is usually 0-5Vdc or 0-10Vdc. Although model-specific, the output of the transducer is usually not a direct function of the stimulus. This means that as long as the regulated power supply falls within the specified power range, it is usually sufficient. Because of their higher output levels, these sensors are not as susceptible to electrical noise as millivolt sensors and can therefore be used in more industrial environments.

4-20 mA Output Pressure Transducers

These types of sensors are also called pressure transmitters. Because 4-20mA signals are least affected by electrical noise and resistance in the signal line, these sensors are best used when signals must be transmitted over long distances. These sensors are typically used in applications where the lead must be 1000 feet or more.

Industrial Applications of Pressure Transmitters

Pressure transmitters are mainly used in the following areas:

  1. Petroleum, petrochemical, chemical. Matching with throttling devices to provide accurate flow measurement and control. Measures pressure and level in pipes and tanks.
  2. Electricity, city gas. And other companies and businesses require high stability and high precision measurement and other places.
  3. Pulp and papermaking are used in places that require chemical-resistant liquids and corrosion-resistant liquids.
  4. Steel, non-ferrous metals, and ceramics are used in furnace pressure measurement and other places that require high stability and high precision measurement. They are also used in places that require stable measurement under strict control (temperature, humidity, etc.).
  5. Machinery and shipbuilding, used to strictly control the place where high precision is required for stable measurement.

Hydrostatic pressure for level measurement:

SI-151 Hydrostatic Level Sensor
SMT3151TR Hydrostatic level transmitter-Rod Type
SI-PCM260 Deep Well Water Level Sensor

Pressure Transmitters VS Pressure Sensors VS Pressure Transducers

A pressure sensor is a device or device that can sense a pressure signal and convert the pressure signal into a usable output electrical signal according to a certain rule.

A pressure sensor usually consists of a pressure-sensitive element and a signal processing unit. According to different test pressure types, pressure sensors can be divided into gauge pressure sensors, differential pressure sensors and absolute pressure sensors. A pressure sensor is the core part of pressure transmitter.

In a pressure transducer, a thin-film or piezo-resistive pressure sensor is mounted on a process connection. The transducer converts pressure into an analog electronic output signal, typically as a millivolt per volt output. These signals are not linearized or temperature compensated.

A pressure transmitter has additional circuitry that linearizes, compensates, and amplifies the signal from a transducer. The different signal types are typically voltage signals (eg, 0 to 5 or 0 to 10 volts), milliamp (eg, 4 to 20 milliamp), or digital. The instrument then can transmit the signal to a remote receiver.

If you still don’t know how to choose the right pressure transmitter. Please feel free to contact our sales engineers. We will provide you with the best pressure measurement and control solution.

Guidelines for Troubleshooting Pressure Transmitters

When this happens, you should consider: Is the pressure source itself stable? The degree of anti-interference ability of the instrument or pressure sensor. Is the sensor wiring normal? The sensor itself is vibrating and the cause of the failure. Is the polarity of the power supply reversed?

Check the degree of pressure variable; make 4-20mA output adjustment.

Check the transmitter’s power supply voltage, calibration equipment and set values (4mA and 20mA points). Check whether the pressure interface is leaking or blocked. Check the wiring mode and power supply. If normal, check if the sensor has zero output. Or Perform a simple pressurization to see if the output changes. If there is a change, the sensor is not damaged.

Check if pressure transmission is blocked; check calibration equipment and adjust sensors; check vehicle damping and electromotive force interference.

Frequently
Asked
Questions

Help Center

1. Do a 4-20mA trimming first to calibrate the D / A converter inside the transmitter. Since it does not involve sensing components, no external pressure signal source is required.

2. Do a full fine-tuning again to make the 4-20mA, digital reading coincide with the pressure signal actually applied. So a pressure signal source is needed.

3. Finally, do the re-ranging, and adjust the analog output 4-20mA to match the external pressure signal source. Its role is exactly the same as that of the zero (Z) and range (R) switches on the transmitter housing.
The communicator can change the range of the intelligent pressure transmitter. And can adjust the zero point and the range without inputting a pressure source. However, this method cannot be called calibration and can only be called “setting the range”. True calibration requires a standard pressure source input to the transmitter.

Adjusting the range (LRV, URV) without using a standard is not calibration. And ignoring the input part (input transmitter pressure) for output adjustment (transmitter conversion circuit) is not a correct calibration. Furthermore, the relationship between the pressure and differential pressure detection components, the A / D conversion circuit, and the current output is not equal. The purpose of calibration is to find the changing relationship between the three.
Emphasize one point:
Only when the input and output (input transmitter pressure, A / D conversion circuit, loop current output circuit) are debugged together, can it be called a true calibration.

First of all, the parameters that must be seen when purchasing a pressure transmitter are:
Pressure range. Range. Measurement medium. Installation method-threaded flange clamps, etc. Installation dimensions. Temperature. Whether with display. Whether with HART protocol. Output type. Current output or voltage output. Explosion-proof level, protection level. Accessories. Mounting bracket.
The above parameters will affect the price of the pressure transmitter.
Sino-Inst, as the manufacturer of pressure transmitter, offer you with the best price.

The input of the pressure transmitter is a pressure signal. The function of the pressure transmitter is to convert the pressure signal input from the outside into a current or voltage signal.

A pressure transmitter is a device that converts pressure into pneumatic or electric signals for control and remote transmission.

It can convert physical pressure parameters such as gas and liquid sensed by the load cell sensor into standard electrical signals (such as 4~20mADC, etc.). Measurement, indication and process adjustment are carried out by supplying secondary instruments such as indicating alarms, recorders and regulators.

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Sino-Inst offers over 20 industrial pressure transmitters.
A wide variety of industrial pressure transmitters options are available to you. Such as free samples, paid samples.
Sino-Inst is a globally recognized manufacturer of industrial pressure transmitters, located in China.
Sino-Inst sells through a mature distribution network that reaches all 30 countries worldwide.
Industrial pressure transmitters 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

Industrial Pressure Sensors

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Insutrial pressure sensor for the pressure measurement application.

A pressure sensor converts the physical quantity ‘pressure’ into an industry-standard electric signal. Sino-Inst manufactures pressure sensors ranging from the sensing element to system packaging. Based on piezoresistive Micro-electromechanical systems and silicon strain gauge , our sensors measure from 20inWc … 200,000 psi. We can also build custom sensors to meet your specific needs. Our product portfolio covers a wide range of pressure sensors. Suitable for refrigeration and air conditioning applications, the food industry, mobile work machines, medical gas and semiconductor industries.

Sino-Inst offers a variety of pressure senors for industrial pressure measurement. If you have any questions, please contact our sales engineers.

CONTACT US

Featured Industrial Pressure Sensors

SI-303 Low-Pressure Transducer
Low pressure transducers for air and non-corrosive gases low pressure measurement. 0 ～ 2.5kPa to 0 ～ 30kPa measurable.
SI-350 Sanitary Pressure Transmitter
Sanitary Pressure Transmitter, also called tri clamp pressure transmitter,
is the pressure transducer with the flush diaphragm (flat membrane) as the pressure sensor.
SI-300 Pressure Transducer 4-20mA/Voltage
The 4-20mA/ Voltage Pressure Transducer,
also called pressure transmitter 4-20mA,
is a pressure sensor with4-20ma/Voltage output.
SI-390 Industrial Pressure Transmitter
Pressure transmitters for general industrial applicaitons. -0.1kPa ~ 0 ~ 0.01kPa ~ 100MPa ~150MPa. 0.1% FS, 0.25% FS, 0.5% FS. 4-20mA (2-wire system), 0-5 / 1-5 / 0-10V (3-wire system)
SI-520 Digital Pressure Sensor
Digital Pressure Sensor is particularly suitable for use in computer control systems. RS485 half-duplex working mode.

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-703 Flush diaphragm pressure sensor
Flush membrane / diaphragm structure, anti-blocking design. Pressure measurement of viscous 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-PT series Melt Pressure Sensors/Transducers – High Temperature
SI-PT series melt pressure sensors work for high temperature melt pressure measurement and control. 

SI-503K Gas Pressure Sensor
Gas pressure sensor for industrial gas pressure monitoring. Pagoda gas nozzle Φ8. Such sensors are also commonly referred to as wind pressure transmitters, exhaust pressure sensors.
SI-702 High Pressure Sensor
High pressure sensor is pressure transmitter designed for high pressure measure&control. 0 ～ 40MPa… 600MPa. M20 × 1.5, G1 / 2 (others are customized according to requirements)
SI-702S Ultra-High Pressure Senors
Pressure sensor for Ultra high pressure applications. Ultra high pressures up to 15,00MPa. 0-2000MPa to 0-7000MPa (customized).Ball head M20 × 1.5, cone head M20 × 1.5.
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 ℃.

SIJC-1000HSM-Silicon Pressure Sensor
silicon pressure sensor, also known as Diffused silicon pressure sensor. Silicon pressure sensors are low cost.
SI-706 Combined Pressure and Temperature Sensor-Dual function
Combined pressure and temperature sensor for Simultaneous measurement of pressure and temperature.
Thermocouple types: J, K, E type or PT100 platinum resistance. Two outputs do not affect each other. 
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
High Frequency Dynamic Pressure Sensor
Cryogenic Pressure Transducer
SI-51 Miniature Pressure Sensor/Transducer
Pressure Sensor | Designed for Shield boring machine-Earth compactor-Grouting machine

Technical Support

A pressure sensor is a device for pressure measurement of gases or liquids.  Pressure sensors can also be used to indirectly measure other variables such as fluid/gas flow, speed, water level, and altitude. Pressure sensors can alternatively be called pressure transducers, pressure transmitters, pressure senders, pressure indicators, piezometers and manometers, among other names.

From Wikipedia : Pressure sensor

In short, a pressure sensor converts pressure into a small electrical signal, which is sent and displayed. Therefore, these are also commonly referred to as pressure transmitters. Two common signals used are 4 to 20 mA signals and 0 to 5 volt signals.
Most pressure sensors work using the piezoelectric effect. This is when the material generates a charge in response to stress. This stress is usually compressive, but may be twisted, bent, or vibrated.

Pressure sensors detect pressure and can determine the amount of pressure by measuring the charge.

The pressure sensor needs to be calibrated in order to know what voltage or milliamp (mA) signal corresponds to what pressure. This is the basic “zero” and “span” calibration or minimum and maximum, which is a common job for maintenance personnel.

What common types of pressure can you measure with a pressure sensor?

We use three common types in the industry.

  • The first is “gauge pressure”. Measured with reference to atmospheric pressure (typically 14.7 PSI). When above atmospheric pressure, you will display a “positive” pressure; when below atmospheric pressure, you will display a “negative” pressure.
  • The next is “absolute pressure“. In short, this is the pressure relative to an absolute vacuum measurement. The absolute pressure of the full vacuum is zero PSIa and it increases from there. This type of sensor can be used if it is necessary to read pressures below atmospheric pressure.
  • The last type that is usually monitored in the industry is “pressure differential”. It sounds like this, the difference between two pressures, a measured pressure and a reference pressure.

Sino-Inst also provides repair services for pressure sensors. Such as WIKA, Rosemount, and other brands of pressure sensors.

Pressure sensor structure

Pressure sensor wiring

Industrial Applications of Pressure Sensors

Pressure sensors play critical process and quality control roles in industrial applications. Industrial pressure sensors provide a reliable solution for medical, HVAC, and industrial applications. Our sensors are signal-conditioned, calibrated over the entire temperature range. And include digital or analog outputs.

Industrial pressure sensors can be used to measure media, namely different types of gases and liquids:

  • Air
  • Atmosphere / barometric pressure
  • Gas
  • Water
  • liquid
  • Hydraulic / pneumatic
  • Corrosive media

Although many of the above apply to corrosive substances. You can also find sensors specifically designed for measuring corrosive media.

Sensors used in chemical processes may need to withstand exposure to corrosive media such as acids or bases. Many stainless steel enclosures and / or diaphragms can be specified to improve corrosion resistance. They can also withstand corrosion due to atmospheric humidity or water splashes. Or withstand permanent immersion in untreated water or chemical-containing water such as treatment plants or swimming pools.

The corrosion hazard caused by seawater, salt spray or coastal environment exceeds the tolerance of ordinary low grade stainless steel. Housing and diaphragm materials such as super nickel alloys or titanium are generally recommended.

Sensors can also be specified, such as using O-rings made of fluororubber instead of parts made of rubber to increase resistance to aging and corrosion. Alternatively, the diaphragm can be welded to the sensor body to enhance corrosion resistance.

How Does a Pressure Transmitter Work?
Pressure Transmitter Calibration

Sino-Instrument 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-Instrument 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.

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SI-303 Low-Pressure Transducer

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Low pressure transducers for air and non-corrosive gases low pressure measurement.

Low pressure transducers also called low pressure transmitters. Sino-Inst offers High-precision low-pressure pressure transducers. 0 ～ 2.5kPa to 0 ～ 30kPa measurable. Low pressure transducer converts the measured pressure into an accurate electrical signal. This process is achieved through a high-performance amplifier circuit. The unique design of this product makes it unique in terms of environmental resistance. It is less affected by temperature changes. Anti-vibration With good long-term stability. Low pressure tranducers are suitable for applicaitons like: Liquid level. Flood warning. Waste water. Clean room. And open channel flow applications.

Sino-Inst offers a variety of low pressure transducers for industrial pressure measurement. If you have any questions, please contact our sales engineers.

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Description

Sino-Inst SI-303 series high-precision low-pressure pressure transmitters adopt internationally renowned brand sensors. The measured pressure is converted into accurate electrical signals through high-performance amplifying circuits.

The unique design of this product makes it resistant to environmental influences Unique play. Little affected by temperature change. Vibration resistance and good long-term stability. It is extremely suitable for engineering equipment, factory automation control and other fields.

Features of Low-Pressure Transmitter

SI-303 Low Pressure Transducer
  • Low range and high dynamic frequency response;
  • Full stainless steel housing, excellent corrosion performance;
  • Advanced temperature digital compensation function, wide working temperature range;
  • Using piezoresistive diffusion silicon chip. The natural frequency is higher than the piezoelectric dynamic pressure sensor (the natural frequency can reach 400kHz);
  • Good signal-to-noise ratio, high resolution, high signal-to-noise ratio, and strong anti-interference ability;
  • Small size, light weight, complete type, high cost performance;
  • Suitable for high-end measurement industries. Such as chemical explosion experiments, hydraulic engineering and aerodynamic experiments;

Specifications of SI-303 Low-Pressure Transducer

Measurement mediumNon-corrosive, dust-free, dry gas
Measuring range         0 ～ 2.5kPa to 0 ～ 30kPa
Overload pressure1.5 times the range
output signal           4 ～ 20mADC (two-wire system)
0 ～ 5VDC, 1 ～ 5VDC (three-wire system) 
Supply voltage range16 VDC ～ 32VDC (constant voltage)
Standard supply voltage24VDC (constant voltage)
Response time 1.0ms 1.0ms
Operating temperature          -20 ℃ ～ + 85 ℃
Compensation temperature0 ～ 70 ℃
Relative humidity          0 ～ 100% (non-condensing)
Load Resistance        (4 ～ 20mA): R = (U-16) /0.02-RD
Where: U is the power supply voltage and RD is the cable internal resistance 
Sum of linearity, hysteresis, and repeatability errors± 0.2% FS (typical value)
± 0.4% FS (maximum) 
Power ImpactLess than 0.02% / V of the output range
Zero temperature drift± 1.5% FS (± 0.2% level), ± 2% FS (± 0.4% level)
Full-scale temperature drift± 1.5% FS (± 0.2% grade), ± 2% FS (± 0.4% grade)
Long-term stability± 0.25% FS / year
ResolutionInfinite, limited only by output noise
Housing material       stainless steel
Process interfaceM20 × 1.5, M12 × 1
Or special production according to user needs 
Leading methodDirect outlet, aviation plug, Hirschmann plug
Electrical parameters (voltage output type):Circuit: 3 wires
Power supply: 24VDC
Output: 0 ～ 5VDC or 1 ～ 5VDC 
Electrical parameters (current output type):Circuit: 2 wires
Power supply: 24VDC
Output: 4-20mA 

Read more about: Common Units Of Pressure

Applications of Low pressure transducers

What is a low-pressure transducer?

Low pressure transducer is pressure transmitter based on piezoresistive pressure sensor. Low pressure transmitters are suitable for air and non-corrosive gases low pressure measurement.

Low pressure transmitters are suitable formeasuring low-level gauge, differential & absolute pressures. Low pressure transmitters with 4 to 20 mA current output, can measure low pressure below 1 bar (15 psi, 400 inWG or 1000 mbar).

Low-pressure transmitters are used to measure air ventilation pressures in buildings. And small pressure differences between two different locations. Such as clean rooms and laboratories where it is important to prevent air contamination.Low pressure ranges are required to measure small pressure values. Often between two locations where the air is being moved from one place to another.

Low range pressure measurement is required for monitoring and controlling ventilation, and air extraction in office and factory buildings. In building management applications, air movement in large spaces creates very small changes in air pressure. So it is necessary to use highly sensitive measurement devices, which are set to read in inches of water column, mbar, hPa or Pascals.

Read more about: Gas Pressure Transducer-Sensor for Gas Pressure Meaurement

How low-pressure transducers work?

Low pressure pressure transmitters use semiconductor piezoresistive effect and micro-machining technology.

On single crystal silicon wafers, semiconductor processes such as photolithography and diffusion are used to make Wheatstone bridges.

When subjected to external forces, micro-strains are generated. The electric bridge is out of balance. The signal is processed by a high-performance amplifying circuit. Makes the product have the advantages of high accuracy, good repeatability, high reliability, etc.

The circuit and core are all sealed in a stainless steel housing. And a variety of installation interfaces are designed.

For very low pressures, there are other types of transducers available, which are based on other principles. These include Pirani gauge, thermocouple and ionization gauge.

The first two techniques are based on the rate at which heat is loss from a heated filament placed in the low-pressure environment. This heat loss is depended on the number of gas molecules per unit volume.

  • Pirani gauge – This gauge calculates filament temperature by measuring filament resistance. Resistance measurement is measured with the help of a Wheatstone bridge circuit. The relation between the resistance and the applied pressure is highly non-linear.
  • thermocouple – In this type of pressure transducer, a thermocouple is attached to the heated filament to measure its temperature. For the reference temperature in the thermocouple, room temperature is used. The voltage output of the thermocouple varies non-linearly with the gas pressure.
  • Ionization gauge – It is highly useful for measuring very small pressures in the range of 10–3 atm to 10–13 atm. Here, the gas, whose pressure is to be measured, is ionized with the help of a heated filament. The current is measured between two electrodes in the ionized region, which depends on the gas pressure, because the number of ions per unit volume depends on the gas pressure.

Q&A

What is the function of a pressure transducer?

A pressure sensor is a device for pressure measurement of gases or liquids. Pressure is an expression of the force required to stop a fluid from expanding, and is usually stated in terms of force per unit area. A pressure sensor usually acts as a transducer; it generates a signal as a function of the pressure imposed. For the purposes of this article, such a signal is electrical.
More about Pressure sensor Wikipedia.

How does a 3 wire pressure transducer work?

Three-wire system: The three-wire sensor is the separation of the positive terminal of the power supply and the positive terminal of the signal output, but they share a COM terminal.
Use one wire for the positive end of the power supply and one wire for the positive end of the signal output. The negative end of the power supply and the negative end of the signal share one line. Its power supply is mostly 24v.dc, the output signal is 4-20ma.dc, the load resistance is 250ω or 0-10ma.dc, and the load resistance is 0-1.5kω; some also have ma and mv signals, but the load resistance or input The resistance varies with the form of the output circuit. The designation of a few-wire system was only after the birth of the two-wire transmitter. This is the result of the extensive application of electronic amplifiers in meters. The essence of amplification is an energy conversion process, which is inseparable from power supply. So the first to appear is a four-wire transmitter; that is, two wires are responsible for the power supply, and the other two wires are responsible for outputting the amplified signal (such as voltage, current, etc.).
How is a 3 wire 4-20mA pressure transmitter connected electrically?
Example of Sensor Connections:
Volts Input + (Supply positive)
Current Output + (Signal positive)
Volts Input (negative) / Current Output (Supply negative)

How do you hook up a pressure transducer?

Pressure sensors are generally two-wire, three-wire, four-wire, and some are five-wire.
Pressure sensor two-wire system is relatively simple. General customers know how to connect. One line is connected to the positive pole of the power supply. The other line is the signal line connected to the negative pole of the power supply through the instrument. This is the simplest. A wire is added to the wire system. This wire is directly connected to the negative pole of the power supply, which is a bit more troublesome than the two-wire system.
The four-wire pressure sensor must have two power input terminals and the other two signal output terminals. Most of the four-wire system is a voltage output rather than a 4-20mA output. The 4-20mA is called a pressure transmitter, and most of them are made of two-wire system.
Some of the signal output of the pressure sensor is not amplified, and the full-scale output is only tens of millivolts. Some pressure sensors have internal amplification circuits, and the full-scale output is 0 ~ 2V.
As for how to connect the display meter, it depends on the range of the meter. If there is a gear that is compatible with the output signal, you can directly measure it, otherwise you need to add a signal adjustment circuit. The five-wire pressure sensor is not much different from the four-wire system. There are relatively few five-wire sensors on the market.

Industrial Pressure Sensors
https://www.drurylandetheatre.com/industrial-process-pressure-transmitters/

Sino-Instrument offers over 10 Low-Pressure Transducers.

About 50% of these are 4-20ma Low-Pressure Transducers. 40% are Differential Pressure Gauge. And 20% are Diaphragm Seal Pressure transmitters. 20% are 4-20ma differential pressure transmitters.

A wide variety of  Low-Pressure Transducers options are available to you, such as free samples, paid samples. 

Sino-Instrument is a globally recognized supplier and manufacturer of 
Low-Pressure Transducers, located in China.

The top supplying country is China (Mainland), which supply 100% of 
Low-Pressure Transducers respectively.

Sino-Instrument sells through a mature distribution network that reaches all 50 states and 30 countries worldwide.

Low-Pressure Transducers 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

SI-350 Sanitary Pressure Transmitter

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Sanitary Pressure Transmitter is also called a Hygienic pressure sensor or tri-clamp pressure transmitter. Sanitary Pressure Transmitter is used for food &beverage or pharmaceutical application.

Sanitary Pressure Transmitter, also called tri-clamp pressure transmitter. It is the pressure transducer with the flush diaphragm (flat membrane) as the pressure sensor. Sanitary Pressure Transmitter uses a flat membrane to directly sense the pressure. The sensor interface is available in clamp type, M27 × 2, and flange type.

The sanitary pressure transmitter is designed especially for the requirements of the food and beverage, pharmaceutical and biotechnology industries.
It is particularly suitable for the special conditions of CIP/SIP cleaning processes. Such as chemical stability towards cleaning liquids and high temperatures

Sino-Inst offers a variety of Sanitary Pressure Transmitters for industrial pressure measurement. If you have any questions, please contact our sales engineers.

CONTACT US
More Pressure Transmitters

Features of Sanitary Pressure Transmitter

SI-350 Sanitary Pressure Transmitter
  • Pressure interface with 316L flat diaphragm structure
  • Hygienic, anti-fouling
  • Wide measuring range for absolute pressure, gauge pressure and sealed reference pressure
  • Good sealing and stable work for a long time
  • With heat sink, high temperature media application performance
  • Output signal can be selected, can be customized according to customer requirements

No Liquid Fill Diaphragm, Sanitary Clamp Fitting

The SI-350 sanitary pressure transmitter uses a flat membrane to directly sense the pressure signal. The diffused silicon pressure core acts as a sensitive component. Standard silicone oil is used as the pressure transmission medium.

The measuring end is made of 316L stainless steel and is specially welded and processed. Compact structure, corrosion resistance, vibration resistance, and wide temperature compensation.

SI-350 Sanitary Pressure Transmitter Type prevents fouling, unsanitary and sticky pressure blocking. Due to the pressure felt directly at the exposed end of the threaded diaphragm. It is particularly suitable for pressure measurement of viscous fluids with hygienic requirements in the medical and food industries.
Widely used in food, medicine, brewing, and other health industries. And stress tests that can scale the measurement medium.

Specifications of SI-350 Sanitary Pressure Transmitter

ModelDescription
350-02Sanitary pressure transmitter, range 0- 10kPa, 300％FS overpressure, 2″ sanitary clamp connection.
350-101Sanitary pressure transmitter, range 0- 20kPa, 300％FS overpressure, 1-1/2″ sanitary clamp connection.
350-12Sanitary pressure transmitter, range 0- 400kPa, 200％FS overpressure, 2″ sanitary clamp connection.
350-22Sanitary pressure transmitter, range 0- 600kPa, 200％FS overpressure, 2″ sanitary clamp connection.
350-32Sanitary pressure transmitter, range 0-1MPa, 200％FS overpressure, 2″ sanitary clamp connection.
350-42Sanitary pressure transmitter, range 0-1.6MPa, 200％FS overpressure, 2″ sanitary clamp connection.
350-52Sanitary pressure transmitter, range 0-2.5MPa, 200％FS overpressure, 2″ sanitary clamp connection.
350-62Sanitary pressure transmitter, range 0-6MPa, 150％FS overpressure, 2″ sanitary clamp connection.
350-72Sanitary pressure transmitter, range 0-10MPa, 150％FS overpressure, 2″ sanitary clamp connection.
Range range -100kPa…0~10kPa…10MPa
Pressure type gauge pressure, absolute pressure, sealing pressure
Power output 4 to 20 mA (12 to 30 VDC)
0 to 5V, 1 to 5V, 0.5 to 4.5V, 0 to 10V (12 to 24VDC)
Accuracy 0.5% FS
Hysteresis and repeatability 0.1%FS
Temperature drift 1.5% FS (@-20 °C ~ 85 °C)
Response time ≤ 1ms (up to 90% FS)
Service life ≥10x 10^6
pressure cycle
Working temperature -20 ° C ~ 85 ° C
Storage temperature -40 ° C ~ 85 ° C
Medium temperature -40～85°C (without heat sink)
-40～150°C (three heat sinks), -40°C～250°C (five heat sinks)
Insulation resistance ≥100MΩ/250VDC
Vibration resistance Sinusoidal: 20g, 25Hz~2kHz; IEC 60068-2-6
Random: 7.5grms, 5Hz ~ 1kHz; IEC 60068-2-64
Protection level IP65
Media compatible with a variety of media compatible with 316L stainless steel
Explosion-proof grade Intrinsically safe explosion-proof ExiaIICT6

Guess You’ll Like: Explosion Proof Pressure Transmitter

Applications of Sanitary Pressure Transmitter

Ideal for applications where sanitary conditions are of high priority (i.e. dairy, food processing, pharmaceutical, etc.)

Medical and health, food, wine, dairy, beverages, etc. thick and easy to block, high hygienic requirements, easy to clean occasions.

Environmentally friendly chemical coatings, polyurethane equipment, paint inspection systems, etc.

Extended reading: Vortex Hygienic Flow Meter

  • Sanitary process applications
  • Food and beverage processing
  • Water processing
  • Dairy processing
  • Pharmaceutical processing

Extended reading: Food grade flow meters for Food & Beverage industry

Drawing of SI-350 Sanitary Pressure Transmitter

Read more about: What is industrial pressure transmitter?

More Featured Pressure Transmitters

Diaphragm Seal Pressure Transmitter
When the process medium should not come into contact with the pressured parts of the measuring instrument. Diaphragm sealed pressure transmitters are used.
SI-303 Low-Pressure Transducer
Low pressure transducers for air and non-corrosive gases low pressure measurement. 0 ～ 2.5kPa to 0 ～ 30kPa measurable.
SI-703 Flush diaphragm pressure sensor
Flush membrane / diaphragm structure, anti-blocking design. Pressure measurement of viscous 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-503K Gas Pressure Sensor
Gas pressure sensor for industrial gas pressure monitoring. Pagoda gas nozzle Φ8. Such sensors are also commonly referred to as wind pressure transmitters, exhaust pressure sensors.
SI-702 High Pressure Sensor
High pressure sensor is pressure transmitter designed for high pressure measure&control. 0 ～ 40MPa… 600MPa. M20 × 1.5, G1 / 2 (others are customized according to requirements)
SI-702S Ultra-High Pressure Senors
Pressure sensor for Ultra high pressure applications. Ultra high pressures up to 15,00MPa. 0-2000MPa to 0-7000MPa (customized).Ball head M20 × 1.5, cone head M20 × 1.5.
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.

Technical Support

Flush diaphragm pressure transducer

Flush diaphragm pressure sensor uses a diaphragm isolation process. Feel the pressure directly with a flat membrane. There is no pressure hole in the test head. There is no clogging of viscous media during the measurement. Adopting flush membrane structure, diffused silicon pressure-sensitive core body, with good moisture resistance and excellent media compatibility. The sensor interface is available in clamp, thread and flange options. The output signal can be selected from voltage, current, and so on. The flush diaphragm of the sensor prevents problems such as scaling, unsanitary and clogging of viscous liquids.

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Steam pressure transmitter

High Temperature Pressure Transducer/Transmitter works for steam and fluid. Temperature: -30 ℃ ～ 160-350 ℃, customized up to 850 ° C. It is possible to fit a stand off pipe, pigtail or other cooling device to reduce the media temperature. If not, High Temperature Pressure Transducer/Transmitter is the best choice. The pressure is transmitted to the sensor through the heat dissipation structure on the transmitter. The high-precision signal processing circuit is located in the stainless steel housing. The sensor output signal is converted to standard output signal, like 4-20mA.

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High pressure transducer

The sino-Inst high-pressure transducer has gone through thousands of fatigue impact tests and several days of low and medium temperature aging cycles before leaving the factory. It has solved the disadvantages of high-pressure sensors in terms of stress and zero instability. Provide customers with reliable products for high voltage measurement. The pressure of the SI-702 series can reach 600MPa. The precision level is high, and the mature production technology can ensure the long-term stability of the sensor with excellent characteristics. SI-702 series pressure sensors are suitable for oil extraction platforms, water flow equipment, high-pressure measurement equipment, hydraulic control systems, test benches, and industrial automation control.

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Pressure Transducer 4-20mA/Voltage

The signal system of 4-20mA and 1-5V output by the pressure transmitter is stipulated by international standards.In the signal circuit, the pressure transmitter is equivalent to a variable resistor. It is connected in series with the power supply, ammeter (indicator), and load resistance (including wire resistance). The function of the pressure transmitter is to change the current in the circuit in the range of 4-20mA by changing its own resistance according to requirements.The pressure acts on the sensor, and the sensitive element deforms. The deformation will cause the resistance or capacitance value to change. And then it will be converted into an analog 4-20mA output by the conversion circuit.

More

Industrial Pressure Sensors
https://www.drurylandetheatre.com/industrial-process-pressure-transmitters/

Other Sanitary Instruments

SANITARY BIMETAL THERMOMETER

Sanitary Bimetal Thermometers also called the sanitary thermometer, or tri-clamp thermometer.

Sino-Instrument’s Sanitary Bimetal Thermometers are specially designed for direct insertion into sanitary process applications when a standard thermowell is not specified, or the process environment is not exposed to pressure. 

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SI-LWGY Sanitary turbine flow meter

Sanitary Flow Meter, also called sanitary turbine flow meter or Hygienic turbine flowmeter.

The Sino-Instrument sanitary turbine flow meter, food grade flow meter, provides accuracy, versatility, and economy, in measuring a wide variety of food, beverage and pharmaceutical products.

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All of Sino-Inst pressure transmitters can work with the AMS TREX!

FAQ

What is pressure transmitter how it works?

Pressure Transmitters are sensors with electrical transmission output for remote indication of pressure. Process transmitters differentiate themselves from pressure sensors through their increased range of functionality. They feature integrated displays, offer high measuring accuracies and freely scalable measuring ranges. Communication is via digital signals, and waterproof and explosion-proof certifications are available. Through connection to diaphragm seals, they are suitable for the harshest operating conditions. Ideal for OEMs, process applications, water processing, and industrial pressure applications.

What is the input of the pressure transmitter?

A pressure transmitter is an instrument that converts pressure variables into a standardized output signal that can be transmitted. And there is a given continuous function relationship between the output signal and the pressure variable (usually a linear function). Mainly used for measurement and control of industrial engineering pressure parameters. Differential pressure transmitters are often used for flow measurement.
There are two types of pressure transmitters, electric and pneumatic. The electric standardized output signals are mainly 0mA ~ 10mA and 4mA ~ 20mA (or 1V ~ 5V) DC signals.

How do you calibrate a pressure transmitter?

If the transmitter is used for a period of time, it may cause a change in metering performance. There will be zero drift and increased measurement error. Therefore, it is necessary to perform regular calibration. The accuracy of the calibrator used for calibration should be more than 3 times the required calibration accuracy. Use the pressure calibrator to input the standard pressure values of 0%, 25%, 50%, 75%, and 100% of the range to the transmitter in the forward and reverse directions. Check whether the current output signal is within the allowable accuracy range. If it is out of tolerance, it needs to be adjusted. The adjustment method is as follows (4 ~ 20mA output):
(1) Input a standard pressure of 4mA with a pressure calibrator. Adjust the ZERO (zero) potentiometer. Make the 4mA current output within the accuracy range.
(2) Input a standard pressure of 20mA with a pressure calibrator. Adjust the SPAN (range) potentiometer. Make the 20mA current output within the accuracy range.
(3) ZERO and SPAN will contain each other. Repeat steps (1) (2) until the current output of 4mA point and 20mA point meets the accuracy requirements at the same time. Then check whether the current output of the 25%, 50%, 75% range points meets the accuracy requirements. The transmitter is qualified if it meets the requirements.

What are the types of pressure transmitters?

There are different types of pressure transducers based on their design.
These sensors can come in several shapes and sizes,
but the technology inside can also differ. 
There 4 main types of pressure sensors based on this: 
Strain Gauge Pressure Transducers
Capacitance Pressure Transducers
Potentiometric Pressure Transducers
Resonant Wire Pressure Transducers
More about Industrial Pressure Sensors

Sino-Instrument offers over 10 Sanitary Pressure Transmitters.

About 50% of these are 4-20ma pressure transmitters, 40% are Differential Pressure Gauge. And 20% are Diaphragm Seal Pressure transmitters. 20% are 4-20ma pressure transducer wiring diagrams.

A wide variety of  Sanitary Pressure Transmitter options are available to you, such as free samples, paid samples.

Sino-Instrument is a globally recognized supplier and manufacturer of  Sanitary Pressure Transmitters, located in China.

The top supplying country is China (Mainland), which supply 100% of  Sanitary Pressure Transmitters respectively. 

Sino-Instrument sells through a mature distribution network that reaches all 50 states and 30 countries worldwide.

Sanitary Pressure 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

SI-300 Pressure Transducer 4-20mA/Voltage

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Pressure transmitters convert pressure signal into 4 ～ 20mA DC, 0-5V, 0-10V signal output.

The signal system of 4-20mA and 1-5V output by the pressure transmitter is stipulated by international standards.In the signal circuit, the pressure transmitter is equivalent to a variable resistor. It is connected in series with the power supply, ammeter (indicator), and load resistance (including wire resistance). The function of the pressure transmitter is to change the current in the circuit in the range of 4-20mA by changing its own resistance according to requirements.The pressure acts on the sensor, and the sensitive element deforms. The deformation will cause the resistance or capacitance value to change. And then it will be converted into an analog 4-20mA output by the conversion circuit.

Sino-Inst offers a variety of 4-20mA pressure senors for industrial pressure measurement. If you have any questions, please contact our sales engineers.

Contact Us

The SI-300 4-20mA/Voltage Pressure Transducer, also called pressure transmitter 4-20mA. It is a pressure sensor with 4-20ma/Voltage output.

4-20mA Pressure Transducer can be OEM as differential pressure, explosion-proof, or sanitary, just as you need.Ideal for OEMs, process applications, water processing, and industrial pressure applications.

Features of SI-300 Pressure Transducer 4-20mA/Voltage

SI-300 Pressure Transducer 4-20mA/Voltage
  • Sensor Type : Industrial Pressure Transducers
  • Pressure Range : 0 – 25 to 14000 psi
  • Output/Span : .5 – 4.5 V, .5 – 4.5 V, 1 – 5 V, 1 – 6 V, 10 mV/V, 4 – 20 mA
  • Type : Compound, Gage, Sealed
  • Accuracy : ±0.5% FSO

All of our pressure transmitters can work with the new AMS TREX

Specifications of SI-300 Pressure Transducer 4-20mA/Voltage

Range range -100kPa…0~10kPa…100MPa (14000psi)
Pressure type Gauge pressure, absolute pressure, sealing pressure
Power supply 24V, 12V
Output signal 4~20mA, 1~5V, 0~10V
Working temperature -20 ° C ~ 85 ° C
Medium temperature -20 ° C ~ 85 ° C
Storage temperature -40 ° C ~ 125 ° C
Zero temperature drift ±1.5% FS (@-20°C～85°C)
Sensitivity temperature drift ±1.5%FS (@-20°C～85°C)
Overload pressure 150% FS
Mechanical vibration 20g (20～5000HZ)
Impact 100g (11ms)
Comprehensive accuracy 0.5, 0.3 optional
Insulation 100MΩ /250VDC
Response time ≤ 1ms (up to 90% FS)
Long-term stability ±0.2%FS/year
EMC Surge (IEC61000-4-5) 2KV
EMC static (IEC61000-4-2) contact discharge 8KV, air discharge 15KV
Protection level IP65
Explosion-proof grade Intrinsically safe explosion-proof ExiaIICT4
Material Housing stainless steel; isolation diaphragm 316L
Media compatible with a variety of media compatible with 316L stainless steel

Read more about: What Is 0-10V Signal Output?

Applications of Pressure Transmitter 4-20mA

  • Industrial OEM Equipment
  • Water Management
  • Pneumatics
  • Hydrogen Storage
  • Sub Sea Pressure
  • HVAC/R Equipment
  • Control Panels
  • Hydraulic Systems
  • Data Loggers

Extended reading: How to convert a 4-20mA to 0-10V /1-5V signal?

Drawings of SI-300 Pressure Transducer 4-20mA/Voltage

4-20ma pressure transducer wiring diagram

We offer OEM and Reseller Discounts for all kinds of 4-20mA pressure transducer

4-20ma differential pressure transmitter

The Smart Differential Pressure transmitter is upgraded differential pressure transmitter, which can work with display, HART communicators, and 4-20mA output. SMT3151DP smart differential pressure transmitters can be used for differential pressure measurement.

Diaphragm seals 4-20ma pressure transducer

Diaphragm seals are used to prevent process medium,
from entering into the pressure-sensing assembly of the Differential pressure, Gauge pressure,
orAbsolute pressure transmitter.

Industrial Pressure Transmitter

Industrial Pressure Transmitter, are precision engineered to fit most industrial pressure measurement applications.
Sino-Instrument can offer industrial pressure transmitters with the display, 4-20ma output,
which can work as a natural gas pressure transducer,
water pressure transmitter, wastewater pressure transducer.

Submersible Pressure Transducer 4-20mA

Submersible pressure transducer with 4-20mA output,
is normal submersible pressure transmitter for level measurement.
Sino-Instrument Hydrostatic submersed level transducers are sensors,
with an electrical transmission output for indication of liquid level.

What is a 4-20mA Current Loop?

The 4-20 mA current loop is a process control signal commonly used in many industries.

This is an ideal method for transmitting process information. Because the current does not change when it flows from the transmitter to the receiver. It is also simpler and cost-effective. However, the number of voltage drops and process variables that need to be monitored can affect their cost and complexity.

By understanding these basics, you will be able to make more informed decisions about process control in your facility. This may affect your bottom line.

In order to understand what a 4-20 mA direct current (DC) loop is and how it works, we need to understand some math. Don’t worry we won’t study any advanced electrical engineering formulas.

In fact, the formula we need is relatively simple:
V = I x R This is Ohm’s law.

This means that the voltage (V) is equal to the current (I) times the resistance (R) (“I” stands for Intensitéde Courant, French for Current Intensity).
This is the basic equation in electrical engineering.
Consider the simple DC circuit above, which consists of one power supply and three loads.
The current loop requires voltage to drive the current. This is powered by the {PART 1} 12 power supply, which is labeled Vtot. Current then flows through the loop through each load. The voltage drop of each load can be calculated according to Ohm’s law.
The voltage drop V1 across R1 is:
Each element in the loop provides a voltage or has a voltage drop. However, currently, everything is the same in the loop.

This is the key principle of the 4-20 mA loop. The current is the same everywhere in the entire circuit.
It may be difficult to understand why the current stays constant, so compare your home’s water supply system.

There is a certain pressure in the water pipes that pushes the water towards the house. Voltage acts in a similar manner as pressure, pushing current through the circuit.
When the faucet in your home is turned on, the water runs down. The flow of water is similar to the flow of electrons or electricity. The ability of pressure to force water through a pipe is limited by the bending and restraint of the pipe. These limits limit the flow in the pipeline, similar to how resistors limit current.

Even if the pressure and voltage drop at various points, the flow through the pipeline and the current through the wires remain constant throughout the system.

This is why the use of current as a method of transmitting process information is so reliable.

Components of a 4-20 mA Loop

Components of a 4-20 mA Loop

1. Sensor
2. Transmitter
3. Power Source
4. Loop
5. Receiver

Why we use the 4 20mA in transmitting signal?

Why is it 4/20 mA?

The reason for using a current signal is that it is less susceptible to interference. And the internal resistance of the current source is infinite. The wire resistance is connected in series in the loop without affecting the accuracy. And it can be transmitted over ordinary twisted pairs for hundreds of meters.

Due to explosion protection requirements, the upper limit is 20 mA: the spark energy caused by a current interruption of 20 mA is not sufficient to ignite the gas.

The reason why the lower limit is not set to 0mA is to detect a disconnection. During normal operation, the value will not be lower than 4mA. And when the transmission line is disconnected due to a fault, the loop current will drop to 0.

Usually, 20mA is used as the disconnection alarm value. There are two more reasons.
One reason is to avoid interference.
Another reason is that the two-wire system uses 4-20 mA of current. That is, the two wires are the signal line and the power line. The 4 mA is used to provide the quiescent operating current of the circuit for the sensor.

Extended reading: Smart Differential Pressure Transmitter

Pressure transmitter 4-20ma price

First of all, the parameters that must be seen when purchasing a pressure transmitter are:
Pressure range. Range. Measurement medium. Installation method-threaded flange clamps, etc. Installation dimensions. Temperature. Whether with display. Whether with HART protocol. Output type. Current output or voltage output. Explosion-proof level, protection level. Accessories. Mounting bracket.
The above parameters will affect the price of the pressure transmitter.
Sino-Inst, as the manufacturer of pressure transmitter, offer you with the best price.

Q&A

What does a pressure transducer do?

A pressure transducer is a device or device that can sense the pressure signal and convert the pressure signal into a usable output electrical signal according to a certain rule.
A pressure transducer usually consists of a pressure-sensitive element and a signal processing unit. According to different test pressure types, pressure sensors can be divided into gauge pressure sensors, differential pressure sensors and absolute pressure sensors.
Pressure transducer is the most commonly used sensor in industrial practice. It is widely used in various industrial automatic control environments, including water conservancy and hydropower, railway transportation, intelligent buildings, production automatic control, aerospace, military, petrochemical, oil wells, electricity, ships, machine tools , Pipelines and many other industries.

How do you test a 4 20ma pressure transducer?

Pressure transducer is a commonly used pressure instrument, which has certain applications in many industries. When a user detects a pressure transducer, the detection items are different depending on the purpose. Of course, the detection methods will be different. I will introduce 3 common methods for pressure transducer detection, and I hope it can help everyone.
1. Pressure test.
The detection method is: power the sensor. Use your mouth to blow the air holes of the pressure sensor. Use the multimeter’s voltage range to detect the voltage change at the output of the sensor. If the relative sensitivity of the pressure sensor is large, this amount of change will be significant. If nothing has changed, you need to use a pneumatic source instead.
Through the above methods, the condition of a sensor can be basically detected. If accurate testing is required, a standard pressure source is required. Apply pressure to the sensor and calibrate the sensor according to the pressure and the change of the output signal. When conditions permit, temperature detection of relevant parameters is performed.
2. Detection of zero point.
Use the multimeter’s voltage range. Detects the zero output of the sensor without applying pressure. This output is typically a mV level voltage. If it exceeds the sensor specifications. It means that the zero deviation of the sensor is out of range.
3. Detection of bridges.
The main test circuit of the sensor is correct. It is generally a Wheatstone full-bridge circuit, which uses the ohm range of a multimeter to measure the impedance between the input terminals and the impedance between the output terminals. These two impedances are the input and output impedances of the pressure sensor. If the impedance is infinite, the bridge is disconnected. It indicates that there is a problem with the sensor or the definition of the pins is not judged correctly.

What is a low pressure transducer?

Low pressure transducers for air and non-corrosive gases low pressure measurement.
Low pressure transducers also called low pressure transmitters. Sino-Inst offers High-precision low-pressure pressure transducers. 0 ～ 2.5kPa to 0 ～ 30kPa measurable. Low pressure transducer converts the measured pressure into an accurate electrical signal. This process is achieved through a high-performance amplifier circuit. The unique design of this product makes it unique in terms of environmental resistance. It is less affected by temperature changes. Anti-vibration With good long-term stability. Low pressure tranducers are suitable for applicaitons like: Liquid level. Flood warning. Waste water. Clean room. And open channel flow applications.
More about low pressure transducer.

What is the difference between transmitter and transducer?

A pressure sensor is a device or device that can sense a pressure signal and convert the pressure signal into a usable output electrical signal according to a certain rule.
A pressure sensor usually consists of a pressure-sensitive element and a signal processing unit. According to different test pressure types, pressure sensors can be divided into gauge pressure sensors, differential pressure sensors and absolute pressure sensors. A pressure sensor is the core part of pressure transmitter.
In a pressure transducer, a thin-film or piezo-resistive pressure sensor is mounted on a process connection. The transducer converts pressure into an analog electronic output signal, typically as a millivolt per volt output. These signals are not linearized or temperature compensated.
A pressure transmitter has additional circuitry that linearizes, compensates, and amplifies the signal from a transducer. The different signal types are typically voltage signals (eg, 0 to 5 or 0 to 10 volts), milliamp (eg, 4 to 20 milliamp), or digital. The instrument then can transmit the signal to a remote receiver.

Sino-Instrument offers over 50 pressure transducers 4-20mA/Voltage.

About 50% of these are 4-20ma differential pressure transmitters, 40% are Differential Pressure Gauge, and 20% are Diaphragm Seal Pressure transmitters, 20% are 4-20ma pressure transducer wiring diagram.

A wide variety of pressure transducers 4-20mA options are available to you, such as free samples, paid samples. 

Sino-Instrument is a globally recognized supplier and manufacturer of  pressure transducers 4-20mA, located in China.

The top supplying country is China (Mainland), which supply 100% of 
pressure transducers 4-20mA respectively. 

Sino-Instrument sells through a mature distribution network that reaches all 50 states and 30 countries worldwide.

Pressure Transducer 4-20mA/Voltage 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.

Current Output, 4 – 20 mA Transmitters

SI2088-W Wireless Pressure Transmitter
SI-390 Industrial Pressure Transmitter
SI-10 Liquid pressure sensor
SI-D100 Diaphragm pressure gauge
Submersible Pressure Transmitter
HART pressure transmitters
SI1151GP Gauge Pressure Transmitter
Liquid Turbine Flow Meters
Magnetic Flow Meters
Orifice flow meter
Oem smart Pressure Transducer pressure sensor
SMT3151LT Pressure Level Transmitter

SI-390 General Purpose Industrial Pressure Transducer

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Industrial pressure transducers are essential devices in various industrial processes. They are designed to convert a liquid or gas(air) pressure into an electrical signal, which can be used to measure or control different industrial applications. SI-390 General Precision Industrial help improve the efficiency and reliability of various industrial processes. Support OEM.

RFQ More Pressure Sensors

Features of SI-390 Industrial Pressure Transducer

  • Compact structure and easy installation.
  • Advanced diaphragm / oil-filled isolation technology.
  • High stability and high reliability.
  • Resistant to vibration and radio frequency interference.
  • 316L stainless steel isolation diaphragm structure.
  • High precision, all stainless steel structure.
  • Miniature amplifier, voltage and current signal output.
  • Strong anti-interference and long-term stability.
  • Forms and structures are diversified and easy to install and use.
  • Wide measuring range, which can measure absolute pressure, gauge pressure and sealed vacuum pressure.
  • Resistant to vibration and shock.
  • Zero and full range can be adjusted.

Specifications of SI-390 Industrial Pressure Transducer

  • Measuring medium: various liquids, gases or vapors compatible with 316L stainless steel
  • Measuring range: -0.1kPa ~ 0 ~ 0.01kPa ~ 100MPa
  • Overload: 1.5 times full scale pressure or 110 MPa (minimum value)
  • Pressure type: gauge pressure, absolute pressure, sealed reference pressure
  • Power supply: 15~30VDC 15~28 VDC 15~28 VDC
  • Output signal: 4~20mADC 0~10/20 mADC 0/1~5/10VDC
  • Transmission method: two-wire system; three-wire system; three-wire system:
  • Accuracy: Typical: ±0.25% FS Maximum: ±0.5% FS
    • (including nonlinearity, hysteresis, and repeatability)
  • Long-term stability: Typical: ±0.1%FS Maximum: ±0.2%FS
  • Zero temperature coefficient: 0.03% FS / ° C (≤ 100kPa) 0.02% FS / ° C (> 100kPa)
  • Full temperature coefficient: 0.03% FS / ° C (≤ 100kPa) 0.02% FS / ° C (> 100kPa)
  • Working temperature: -30~ 80°C
  • Storage temperature: -40～100°C
  • Load resistance: ≤ (U-15) / 0.02Ω
  • Electrical connection: cable connection, aviation hoe, Hessmann components
  • Housing material: stainless steel 1Cr18Ni9Ti
  • Process interface: M12×1 N20×1.5 or G 1/4 external thread
  • Protection level: IP65
  • Explosion-proof mark: ExiaIICT6 (intrinsic safety explosion-proof type)

Drawings of SI-390 Industrial Pressure Transducer

Industrial Pressure Transmitter drawings
Industrial Pressure Transmitter drawings

What is the pressure transducer?

Pressure transducer/transmitter is a device that converts pressure into pneumatic signal or electric signal for control and remote transmission.

It can convert the gas, liquid and other physical pressure parameters felt by the load cell sensor into a standard electrical signal (such as 4-20mADC, etc.). Use secondary instruments such as indicator alarms, recorders, and regulators for measurement, indication, and process adjustment.

Industrial Pressure Transmitters are precision-engineered to fit most industrial pressure measurement applications. Sino-Instrument offers industrial pressure transmitters with the display, 4-20ma output.

The industrial pressure transmitter can work as a natural gas pressure transducer, water pressure transmitter.

The piezoresistive pressure transmitter uses an advanced micromechanical etching process. By diffusing four high-precision resistors with temperature compensation on the silicon wafer. Form a Wheatstone bridge. Due to the piezoresistive effect, the resistance values ​​of the four bridge arm resistors change. The bridge is out of balance. The sensitive element outputs an electrical signal corresponding to a pressure change. The output electrical signal is amplified by the compensation of the non-linear correction circuit to generate a voltage and current signal that has a linear correspondence with the input pressure.

It uses a programmable KELLER-ASIC chip called a “programmable resistor.” The “programmable resistance” chip allows the transmitter to be installed and calibrated with automatic test equipment to improve product quality and reduce costs.

The transmitter uses 6SC series bellows. The piezoresistive silicon pressure sensor is housed in an oil-filled capsule. The dielectric voltage is isolated by the stainless steel diaphragm and transmitted to the wafer through the oil-filled liquid.The sealed pressure gauge has a TAB (Automatically Insulated Tape) sensor. The sensor floats freely in oil to ensure stability and durability.The “programmable resistor” line has a network of programmable resistors. The network adjusts the zero / gain and temperature coefficients.

All SI-390 series transmitters undergo pressure and temperature cycle compensation test procedures. At the end of the compensation test, various parameters are automatically calibrated. And adjusted by computer-controlled test equipment. A final inspection is then carried out and results are obtained. Check if it is correct. The adjustment position is correct and meets the requirements.

The transmitter is very reliable and economical. It is suitable for process control and pressure measurement in petroleum, chemical, metallurgy, power, light industry, textile, building materials, hydrogeology, food, medicine, environmental control, papermaking, and other industries.

SI-390 Industrial Pressure Transmitter is used for process control in the petrochemical, chemical and HVAC industries. They allow measurement results to be transmitted to the control center.The compact, rugged design makes these instruments suitable for a variety of applications. Including hydraulic and pneumatic, vacuum, test equipment. Level measurement, pressure control, compressor control, pump protection and many other processing and control operations. A wide range of electrical and process connection options can meet almost all requirements.

  • Hydraulics and pneumatics
  • Test equipment
  • Pump and compressor control
  • Liquid level measurement
  • Off-road equipment
  • Compressor control
  • Industrial engines
  • Industrial refrigeration

These types of transducers are also known as pressure transmitters.

Since a 4-20mA signal is least affected by electrical noise and resistance in the signal wires, these transducers are best used when the signal must be transmitted long distances. 

It is not uncommon to use these transducers in applications where the lead wire must be 1000 feet or more.

Extended reading: How to calibrate HART pressure transmitters

How to choose the right industrial pressure transducer?

Pressure transmitters are pressure sensors whose electronics can generate measurement signals. The signal can be remotely transmitted via cables, buses or radio frequency.

Consider the unit’s measurement range and maximum pressure capacity, it’s precision, its operational environment (temperatures, vibrations, etc.), the nature of the measured medium and the type of output signal.

  • 1. In order to ensure the stable operation of the product,
    • it is recommended to consider the actual pressure value,
    • and the range of possible migration when selecting the measurement range.
    • The maximum pressure should be within the measurement range,
    • and the company will complete the migration before leaving the factory.
  • 2. The product is installed vertically on the field pressure interface, and the display level is facing the observer.
  • 3. For transmitters with zero pressure and negative pressure, please indicate the range of the range in the order.
  • 4. Intrinsically safe explosion-proof products are limited to products with a pointer head.
  • 5. Qiping diaphragm type transmitter measurement range is 0 ~ 70kPa … 35MPa.
  • 6. When M3 is selected, the ambient temperature range of the transmitter is -20~60°C;
    • when M4 is selected, the ambient temperature range of the transmitter is -30~70°C.

Want to know more about pressure transmitter?

This video gives you the answers to your basic questions about pressure and pressure transmitters.

More Related Industrial Pressure Sensors

SI-512H High Temperature Pressure Sensor
SIJC-1000HSM-Silicon Pressure Sensor
SI-706 Combined Pressure and Temperature Sensor-Dual function
SI-338 Ceramic Pressure Sensor
High Frequency Dynamic Pressure Sensor
Cryogenic Pressure Transducer
Diffused silicon Gauge Pressure Transmitter
Capacitive Gauge Pressure Transmitter
Explosion-proof Pressure Transmitter
Diaphragm Seal Pressure Transmitter
Hygienic / Sanitary Pressure Transmitter
Remote Seal Differential Pressure Transmitter

More Industrial Pressure Transducer Applications and Markets

Cryogenic Pressure Transducers

Cryogenic pressure transducer for low temperature pressure measurement.  -196℃～+125℃、-260℃/-350c（especial）. Sino-Inst offers a variety of Pressure Sensors for pressure measure and…

Pressure Transmitter Calibration

Pressure transmitter calibration is what you need to do before you install the pressure transmitters. Also called pressure transducer calibration,…

Frequently
Asked
Questions

Help Center

Pressure transmitter types:

  • According to the working principle: it can be divided into capacitive, piezoresistive, resonant, etc. (resonant pressure transmitters can directly output digital pulse signals without going through the signal processing circuit);
  • According to the wiring method: it can be divided into a two-wire system, a three-wire system (one positive power line. Two signal lines, one of which is GND), a four-wire system (two positive and negative power lines, two signal lines, among them One GND), etc.;
  • According to the output mode: it can be divided into a voltage output, current output, digital signal output, etc.;
  • According to the pressure measurement range: it can be divided into general pressure transmitter (0.001～35MPa), micro pressure transmitter (0～1.5kPa), negative pressure transmitter (0～-100kPa), etc.;
  • According to accuracy: can be divided into high accuracy transmitter (0.1% or 0.075% level) and general transmitter (0.5% level);

Pressure transmitters are widely used. Typical examples are constant pressure water supply, pipeline monitoring, hydraulic systems, automated testing, etc. Used for air pressure, hydraulic, oil pressure testing. There are many users who cooperate with us. We The engineers have accumulated rich field experience.

Sino-Instrument offers 10 Industrial Pressure Transducer products.

These are wireless pressure transmitters, pressure transmitter with display, and water pressure transmitter. A wide variety of Industrial Pressure Transducer options are available to you, such as free samples, paid samples.

The top applying countries are China (Mainland), Hong Kong, and the United States, which supply 96%, 2%, and 1% of wireless pressure transmitter respectively.

Industrial Pressure Transmitter products are most popular in North America, Domestic Market, and South America.

Sino-Inst is a company that designs and manufactures OEM pressure transducers and transmitters featuring various pressure sensor technologies to tailor designs to individual applications.

Our Indutrial pressure transducers are available in various pressure ranges with customized and electrical or pressure connections, as well as analogue and digital interfaces. Contact us today for a standard product quotation or to discuss a custom solution.
Contact Sino-Inst for a standard product quotation or to discuss a custom OEM solution.

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SI2088-W Wireless Pressure Transmitter

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Wireless Pressure Transmitter is often used for outdoor pressure measurement. Battery-Powered Self-Contained Pressure Monitoring Solution.

Wireless Pressure Transmitter is based on GPRS mobile network or NB-iot IoT transmission. Powered by solar panel or 3.6V battery, or wired power supply. NB-IOT / GPRS / LoraWan and eMTC, a variety of networks are available. , Full-scale compensation, high-precision and high-stability amplifier IC temperature compensation function. The medium pressure can be measured as 4 ~ 20mA, 0 ~ 5VDC, 0 ~ 10VDC, 0.5 ~ 4.5VDC and other standard electrical signals. There are many ways to connect product processes and electrical connections, which can best meet the needs of users.

Sino-Inst offers a variety of Wireless Pressure Transmitters for industrial pressure measurement. If you have any questions, please contact our sales engineers.

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More Wireless Presssure Solutions

Features of SI2088-W Wireless Pressure Transmitter

SI2088-W Wireless Pressure Transmitter is a lithium battery-powered digital pressure gauge with wireless data transmission. The built-in high-precision pressure sensor can accurately display the pressure in real time. It has high stability and long-term stability.

This digital pressure gauge is equipped with a large-size high-definition LCD liquid crystal display and a built-in MCU. With the mature GPRS / LTE / NB-IoT network, the pipeline pressure on the spot is uploaded to the data center.

The product adopts a cast aluminum shell with good shock resistance. The built-in SUS630 stainless steel diaphragm has good media compatibility. It can measure gases, liquids, oils and other non-corrosive media to stainless steel.

The product function is practical, the reporting frequency can be set. The pressure collection frequency can be set. It has a real-time pressure alarm function. Once the pressure is abnormal, the alarm data can be sent in time. The alarm pressure value can be set. Two consecutive detections exceed the set value and the detection frequency is automatically increased At the same time, the amount of change will be detected. After the amount of change exceeds 10% of the total range (default, can be set), the data will be reported immediately.

In addition, it also has a variety of pressure unit switching, error clearing, and one-key wake-up functions. It is especially suitable for unmanned, inconvenient power supply, such as fire pipelines, fire terminals, fire pump rooms, and urban water supply, which require remote monitoring.

SI2088-W Wireless Pressure Transmitter
  • Five-digit LCD display, visual key operation
  • Remote parameter setting, panel parameter setting
  • Ultra-low power consumption design, powered by 7.2V lithium battery.
  • Using GPRS / LTE / NB-IoT network, stable signal
  • One key to wake up
  • High precision, full range coverage
  • Message format can be customized (default Modbus_RTU protocol)

Sino-Inst provides products that can replace Rosemount 3051S wireless pressure transmitter. Sino-Inst also provides maintenance and calibration of Rosemount and WIKA pressure measurement products.

Specification Wireless pressure transmitter

Pressure Range: -100kPa ～ 60MPa
Pressure type:Sealed gauge pressure / absolute pressure / differential pressure
Accuracy:± 0.2 ~ ± 0.5% FS
Display: 5 digit LCD display, white backlight
Network standard: GPRS / NB-IOT / LoraWan wireless signal transmission (customized according to demand)
Skyline: External
Sampling interval: It can be set arbitrarily, in seconds, if it needs real-time collection, set to 0
Upload interval: It can be set arbitrarily, in minutes, the fastest is 1 minute, if you need to set it to 0
Wake-up mode: timer, button, alarm wake-up
Configuration mode: local configuration / remote configuration
Upload information: data of each channel, battery information, network status, self-test status, signal strength, alarm information, etc.
Power supply: 3.6V@13Ah section X2
Power consumption: standby current ≤50uA, sending average current ≤100mA
Working temperature: -20 ℃ ～ 70 ℃
Storage temperature: -40 ℃ ～ 85 ℃
Vibration: ≤3g / 10Hz … 150Hz (IEC 60068-2-6-2007)
Protection level: IP67
Pressure-sensitive diaphragm: Stainless steel 316L
Shell material: 304 steel joint + aluminum alloy shell
Installation method: Vertical and horizontal installation

Battery operated wireless pressure transmitter

The wireless pressure transmitter sensor is a battery-powered low-power / wireless digital output digital pressure gauge.

  • Low power consumption design. 3.6V / 7.2V lithium battery can be selected for power supply (ER34615M is recommended).
  • It can report 70,000 times during NB-IoT communication. Battery-powered, ultra-low power operation. Battery life reaches 2-5 years (affected by upload interval time).

Drawings of SI2088-W Wireless Pressure Transmitter

Drawings of SI2088-W Wireless Pressure Transmitter
Common connector – wireless pressure transmitter

How Wireless Pressure Transmitter Works ?

Install the wireless pressure transmitter on the pipeline.

When the medium in the pipeline acts on the sensitive element, it is pressed.

Its internal circuit detects an electrical signal proportional to the process pressure.

After the signal is accurately amplified and compensated by the linear amplifier circuit.

Enter the microprocessor to measure, process and display data.

And wirelessly transmit the measurement data to the remote terminal equipment.

The wireless pressure transmitter adopts the wireless remote transmission module added on this basis. It can form a pressure acquisition system with our intelligent wireless receiving terminal.This system changes the transmission mode and switching power supply mode of RS485 and 4-20mA in the industry. It uses 3.6V lithium battery power supply. This simplifies the installation and saves the cost of customer wiring. The purpose of environmental protection. The product is widely used in various industrial pressure measurement systems. Such as oil fields, power, petrochemical and some occasions where wiring is inconvenient.

How Does a Pressure Transmitter Work?
Pressure Transmitter Calibration

Applications of SI2088-W Wireless Pressure Transmitter

Wireless pressure transmitters are suitable for measuring non-viscous liquids, vapors and gases, etc.

  • Fire water pipe network
  • Heating
  • Smart Water
  • Medical equipment
  • Other occasions requiring wireless pressure monitoring
  • Advanced HVAC Systems
  • Hydraulic / Pneumatic Systems
  • Agriculture Equipment
  • Energy Generation and Management
  • Pool / Spa Pump Monitoring

Wireless hydrostatic level transmitter

The battery operated hydrostatic level transmitter integrates the functions of liquid level acquisition, wireless reporting and local digital display.

The construction of the wireless liquid level transmitter is simple and ready to use. It is mainly suitable for places where power is not available on site and remote data transmission is required. It can be widely used in liquid level monitoring in urban water supply and drainage, sewage treatment, hydrology and water resources, fire protection, industry and other fields.

Of course, the wireless pressure transmitter can also be customized on other instruments. Such as wireless differential pressure transmitter, wireless absolute pressure transmitter, wireless temperature transmitter, wireless liquid level transmitter, etc.

Wireless Pressure Transducer
Submersible Pressure Transducer
Hydrostatic Level Sensor
Anti-corrosive Submersible Level Transmitter

Wireless Pressure Transmitter Price

Wireless Pressure Transmitter Price will cost more than ordinary pressure transmitters.

First of all, the parameters that must be seen when purchasing a pressure transmitter are:
Pressure range. Range. Measurement medium. Installation method-threaded flange clamps, etc. Installation dimensions. Temperature. Whether with display. Whether with HART protocol. Output type. Current output or voltage output. Explosion-proof level, protection level. Accessories. Mounting bracket.

Extended reading: How to calibrate HART pressure transmitters

The above parameters will affect the price of the pressure transmitter.
Sino-Inst, as the manufacturer of wireless pressure transmitter, offer you with the best price.

Sino-Inst offers 5 wireless pressure transmitter products. These are wireless pressure transmitters, wireless differential pressure transmitter, and wireless temperature transmitter.

A wide variety of wireless pressure transmitter options are available to you, such as free samples, paid samples. Sino-Inst is wireless pressure transmitter manufacturer, located in China.

Wireless pressure transmitter 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

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