Working Principle Of Differential Pressure Transmitter

The basic principle of the differential pressure transmitter is that a space with a sensitive element (multi-purpose diaphragm) is divided into two chambers, respectively, when the pressure is introduced to the two chambers, the sensor produces displacement (or the trend of displacement) under the combined action of two pressures, and the displacement is proportional to the pressure difference between the two chambers (differential pressure), and the displacement is converted into a standard signal output that can reflect the size of the differential pressure.

When the capacitor double flange differential pressure transmitter is equipped with a remote transmission seal device, it constitutes a remote pressure/differential pressure transmitter. The remote transmitter can avoid direct contact between the measured medium and the isolation diaphragm of the transmitter.

Provide a variety of structural materials, remote transmission device components welding structure reliability. Liquid filling cavity low volume design to reduce the impact of environmental temperature, according to user requirements, the use of ordinary silicone oil temperature range (-30~150)℃; Internal charge high temperature silicone oil use temperature range (15~315)℃(required ambient temperature ≥10℃. In a cold environment, it is generally used in capillaries with tropical accompanying).

The upper limit of working pressure of the remote transmission device is the rating of the remote transmission device selected by the user; The working pressure shall not be less than 6kPa. For corrosive media, select isolation diaphragm material. For corrosive media, select isolation diaphragm material.

When the pressure on both sides is inconsistent, resulting in displacement of the measuring diaphragm, the displacement is proportional to the pressure difference, so the capacitance on both sides is unequal, and is converted into a signal proportional to the pressure through the oscillation and demodulation link. The working principle of the pressure transmitter is the same as that of the differential pressure transmitter, the difference is that the low pressure chamber pressure chamber atmospheric pressure or vacuum.