The difference between the pressure thermocouple sensor and pressure transmitter with contact

Many users choose to pressure measurement products, often don't know what to choose or pressure transmitter, pressure thermocouple sensor sometimes is often confused with, of course it's not good measurement effect.

pressure thermocouple sensor is converted to electrical signal output thermocouple sensor. Usually the pressure measuring instrument of electrical measuring instrument is called pressure thermocouple sensor. Pressure thermocouple sensors usually points to is a standard video signal output component level product, is the core element of pressure transmitter, due to the non standard signal, users need and design pressure calibration when using a special signal processing circuit; Because the signal is weak, longer distance will need to add amplifier. Pressure thermocouple sensors usually consists of elastic sensitive element and a displacement sensor. Elastic sensitive element of the role is to make the measured pressure in a certain area and converted to the displacement or strain, and the displacement sensor and strain gauge can be converted into electrical signals into a certain relationship with the pressure. Stress is the automation of production process and an important parameter in aerospace, aviation, national defense industry, not only need for fast dynamic measurement, but also will be digital display and record the measurement result. Therefore the pressure thermocouple sensor is highly valued and fast-growing a thermocouple sensor.

pressure transmitter on the meaning of written also belong to pressure thermocouple sensor, but the output signals for the standard generic, such as 4 to 20 ma, 1 to 5 v, etc. , can be transmitted over a long distance, and can be matched with standard instrument. The pressure value calibration were carried out at the same time, the user simply through the instrument range setting can be used. Pressure transmitter is the function of the pressure signal to the electronic equipment, pressure on the computers. Its principle is: will pressure the pressure mechanical signal into a voltage or current of electrical signals.

a linear relationship with pressure and voltage or current size, general is proportional relations. So the transmitter output voltage or current with the pressure increases, thus obtained a pressure and the relation between the voltage or current, future pressure calculation.