Remote pressure gauges are suitable for measuring the pressure of liquids, vapors and gases that do not corrode steel and copper alloys. A sliding line resistive transmitter is arranged inside the meter to transmit the measured value to the secondary meter far away from the measuring point to realize centralized detection and remote control. The meter can also indicate pressure on site to facilitate the site. Process inspection. The meter consists of a spring tube pressure gauge and a sliding wire resistive transmitter.
The mechanical principle of the remote pressure gauge is the same as that of the general spring tube pressure gauge. Since the resistance transmitter is disposed on the gear transmission mechanism, when the sector gear shaft in the gear transmission shaft is deflected, the rotating arm (brush) of the resistance transmitter is also deflected accordingly, because the brush slides on the resistor Therefore, the change of the measured pressure value is converted into a change in the resistance value, and is transmitted to the secondary meter to indicate a corresponding reading value. At the same time, the instrument also indicates the corresponding pressure value.
The two pressures of the medium to be tested of the pressure transmitter are introduced into the high and low pressure chambers, acting on the isolating diaphragms on both sides of the delta element (ie, the sensitive element), and transmitting to the measuring membrane through the spacer and the filling liquid in the element. On both sides of the piece. The 4-20 mA standard signal of the capacitor output of each of the electrodes on the measuring diaphragm and the insulating sheets on both sides is fed into the program control system.
