subject: Some Tips For Pressure Transmitter [print this page] High precision sensor technology affects the development of pressure transmitter technology. As the one of the most important factors for development, the accuracy of high precision type is higher than 0.05%. For the end user concerned, the improving reliability of transducer also means less maintenance cost and process running time.
Industrial pressure transducers, as the most common type of industrial sensors, are widely used in various industrial control environment, water conservancy, hydropower, railway transportation, intelligent building, production control, aerospace industry, military industry, petrochemical, oil, electric power, ships, machine tools, pipe and many other industries.
Pressure sensor include: resistance strain gauge type, semiconductor strain gauge type, piezoresistive type, inductance type, capacitance type, resonant type and capacitive acceleration type, etc. And piezoresistive pressure transmitter is the most widely used one, with low price, high accuracy and good linear characteristic. Below is an introduction for this kind of sensor.
Ceramic pressure transmitters, without liquid transmitting, resist corrosion. It works by pressure acts on the surface of Ceramic membrane and make the diaphragm produce small deformation. The thick-film resistor printed on the back of the ceramic membrane connected to be a Wheatstone bridge, which makes the bridge produce linearity being proportional to pressure and voltage signal be proportional to excitation voltage due to the pressure sensitive resistance of Piezoresistive effect. According to the range, standard signal can be labeled as 2.0/3.0/3.3 mV/V, etc. Through the laser calibration, with high temperature stability and time stability, sensor can contact with the most common mediums. Ceramic is known for its high elasticity, corrosion resistance, abrasion resistance, impact resistance and vibration of the material. Ceramic can work in temperature range up to -40 ~ 135, for the thermal stability and thick film resistor. With high precision and stability of the measurement, Electrical insulation level > 2 kv and the output signal is strong and long-term stability. High characteristic, low price of the ceramic sensor will be the development direction of the pressure transmitter.
Diffusion silicon P1200 pressure transmitter is working by pressure acts on diaphragm (stainless steel or ceramic). Pressure makes diaphragm produce displacement, which makes resistance value changed. By the electronic circuit, value is tested and converted into standard measurement signal which is corresponding to the pressure.
