Industrial Automation Strain Gauge Pressure Transmitter With 0.1% To 0.5% FS Accuracy

The strain gauge pressure transmitter is a pressure measurement instrument based on the "strain effect" principle, widely used in industrial automation, process control, scientific research and other fields. It converts the measured pressure into changes in resistance value through elastic sensitive elements and resistance strain gauges, and then the measurement circuit converts the resistance changes into standard electrical signals (such as 4-20mA, 0-5V, etc.) for output, achieving precise pressure measurement.

The core principle of a strain gauge pressure transmitter is the "strain effect": when pressure is applied to an elastic element (such as a metal diaphragm or strain tube), the elastic element undergoes a slight deformation. The resistance strain gauge attached to it also deforms, resulting in a change in resistance value. The resistance change is detected by a Wheatstone bridge and converted into a voltage or current signal proportional to the pressure, which is ultimately output as a standard industrial signal.

• High precision and stability: The accuracy is usually up to 0.1% to 0.5% FS, with good long-term stability, making it suitable for precise measurement.
• Wide measurement range: It covers from -100 kPa to 160 MPa, and is applicable to various measurement methods such as gauge pressure, absolute pressure, and sealed gauge pressure.
• Strong anti-interference ability: It is resistant to vibration and shock, supports reverse polarity protection and overvoltage protection, and is suitable for harsh industrial environments.
• Compact structure and flexible installation: It is small in size and light in weight, supports multiple electrical connections and pressure interfaces, and is easy to integrate.
• High cost performance: Compared with high-end transmitters such as single-crystal silicon, it has a lower cost and is suitable for applications with limited budgets.

• Industrial process control: Pressure monitoring of pipelines and storage tanks in fields such as petroleum, chemical engineering, power, and metallurgy.
• Machinery and equipment: Hydraulic systems, pneumatic control, engine testing, etc.
• Research and medical: Pressure measurement in laboratories, fluid pressure monitoring in medical equipment.
• Special environments: High temperature, low temperature, corrosive media (anti-corrosion type is required).

• Select based on medium: For corrosive media, choose anti-corrosion types (such as PVDF material).
• Confirm output signal: Commonly used are 4-20mA (two-wire system) or 0-5V/0-10V (three-wire system) [13].
• Environmental adaptability: For high/low temperature scenarios, pay attention to the working temperature range (such as -40 to 120℃).
• Explosion-proof requirements: In hazardous environments, select explosion-proof certified models (such as intrinsically safe types).