1. Gauge pressure transmitter:
Gauge pressure transmitters are pressure transmitters that use local atmospheric pressure as a reference zero point.
2. Absolute pressure transmitter:
The absolute pressure transmitter is a pressure transmitter with vacuum as reference zero point. During use, the reference zero point of the sensor can be automatically adjusted without any correction according to the location of the location. The shape and gauge pressure transmitter are no different.
3. Differential pressure transmitter:
The differential pressure transmitter is a pressure transmitter that measures the pressure difference between two pressure chambers. The differential pressure transmitter has two pressure chambers of "+" and "-", respectively. Respectively take the pressure of the two as the comparison value, usually the larger pressure end as "+" pressure chamber.
Note: When ordering a differential pressure sensor, please note that one parameter specific to the differential pressure transmitter is static pressure resistance. For example, when we use a differential pressure transmitter, the pressure on the “+†pressure end is 10 MPa. “-â€
Pressure on the pressure end is 10.5MPa, then the differential pressure measured by the transmitter is: 10.5-10 = 0.5MPa
The transmitter is subjected to a static pressure of 10 MPa. In the application process, the use of high static pressure and low differential pressure are commonplace. The differential pressure transmitter ordered by the static pressure should not exceed the differential pressure transmitter's resistance to static pressure, otherwise, it is easily damaged.
4. Input/plug level transmitters:
Level transmitters are divided into input and plug-in two, the two forms are the same, are all converted to the liquid pressure. When the water depth is 1m, the pressure on the transmitter is 10KPa. When ordering such sensors, pay attention:
1. The density of the measured liquid should be reported to the production unit.
2. When the measurement medium is corrosive, the production unit should be informed.
3. When the measured medium temperature exceeds -10°C and 60°C, the production unit is informed.
5. High temperature pressure transmitter:
For high ambient temperature or high temperature of the measurement medium in the measurement site, a medium-high temperature pressure transmitter must be used. The transmitter has a good zero temperature coefficient and sensitivity temperature coefficient, which can ensure the measurement accuracy in a high temperature environment. . When ordering this type of transmitter, it is necessary to inform the measuring medium temperature and the ambient temperature in order to facilitate the manufacturer's reasonable response.
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