First, the pressure range, accuracy and stability Second, the measured medium Third, the accuracy of the transmitter Fourth, determine the temperature range Five, the transmitter output signal six, special protection or filter
If the transmitter's measured media is likely to corrode the transmitter's material, it is necessary to select the transmitter with the isolation diaphragm, otherwise it will affect the long-term use of the transmitter.
The material of the contact medium part of the general pressure transmitter is made of 316 stainless steel. If your medium is not corrosive to 316 stainless steel, then basically all pressure transmitters are suitable for your medium pressure measurement. If your medium is corrosive to 316 stainless steel, then we have to use a chemical seal, which not only can measure the pressure of the medium, but also can effectively prevent the medium and the pressure transmitter's wetted part of the contact, so as to play Protecting the pressure transmitter extends the life of the pressure transmitter.
Non-linearity, hysteresis, non-repeatability, temperature, zero-offset calibration, and temperature can affect the accuracy of the transmitter to a great extent . The higher the accuracy, the higher the price.
A transmitter has two temperature ranges calibrated, that is, a normal operating temperature range and a temperature compensated range. The normal operation temperature range refers to the temperature range when the transmitter is not destroyed in the working state. When the temperature compensation range is exceeded, the application performance index may not be achieved.
The choice of output depends on a variety of factors, including the distance between the transmitter and the system controller or display, presence of "noise" or other electronic interference signals. Do you need amplifiers, amplifier locations, etc.
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