A, pressure sensor, transmitter is generally measured fluid (such as: liquid, gas, melt) pressure. The pressure unit commonly used are: Pa, KPa, MPa, bar, Kg/cm2. Each pressure sensor, transmitter has certain pressure measuring range, can measure the maximum pressure value is called: range.

Second, the pressure sensor output signal is usually mV (mV) as the unit of voltage signal. The signal output and the size of the supply pressure sensors of the power supply voltage size has a direct relationship. Most of the sensor output is 1-2 mv/V. Of measured medium, that is, when the pressure reaches the maximum nominal pressure sensor, if the supply of the sensor power is 1 v, the output signal is 1-2 mv. Similarly, if the supply of the sensor power is 10 v, the output signal is 10-20 mv.

Third, the pressure sensor output signal of the commonly used are: 4-20 ma, 0-20 ma, 0-5 v, 1-5 v, and 0-10 v, RS485 and RS232. The signals are standard, only the size of the output and the measured medium is proportional to the pressure. The rated voltage range, output will not change along with the change of power supply. Commonly used frequency converter, PLC, control, display instrument, such as the signal receiving module can receive these standard signal.

Four, in order to feel the pressure of the measured medium, pressure sensor, transmitter are threaded or flanged used to connect to a pipe or container.

Five, range, signal, connection thread, is buying pressure sensor, transmitter must clear before the three main factors. A sensor positioned, the three elements cannot be changed again.