There are many types of transmitters, which can be divided into pressure transmitters, liquid level transmitters, temperature transmitters, etc. according to the different physical quantities measured. According to the different output signal methods, it can be divided into analog transmitter and digital transmitter. According to the structure, the transmitter can be divided into ordinary type and isolated type transmitter. Today we will take a look at the differences between normal and isolated transmitters. The measuring cassette of the ordinary transmitter directly feels the pressure and differential pressure of the medium to be measured. The measuring diaphragm of the isolated transmitter receives the pressure of a stable liquid, and this stabilizing liquid is sealed in the middle of two diaphragms, the diaphragm that accepts the measured pressure is the outer diaphragm, and the diaphragm of the original ordinary diaphragm box is the inner diaphragm, when the pressure signal is received on the outer diaphragm, the pressure of the outer diaphragm is transmitted to the ordinary diaphragm through the transmission of silicone oil, and the pressure felt by the outer diaphragm is measured. Isolated transmitters are also known as flanged transmitters. The specific mechanism principle is that the opening of the device under test plus flange type transmitter, after installation, its induction diaphragm is a part of the equipment wall, when the transmitter measures the medium that is easy to crystallize, the ordinary transmitter is easy to cause the impulse tube and the diaphragm chamber to be blocked, thus affecting the normal use. This is not the case with isolated transmitters. As a transmitter user, it is important to fully understand the relevant differences before purchasing a transmitter.

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