The differential pressure controller comprises 2 diaphragm cavities; the two cavities are sealed by two sealing diaphragms and a differential pressure-sensing diaphragm. The high pressure and low pressure enter the differential pressure controller’s high-pressure chamber and low-pressure chamber, respectively. The differential pressure felt deforms the pressure-sensing diaphragm through mechanical structures such as bar springs and activates the micro switch at the top end to make an electrical signal output. Differential pressure controllers are divided into diaphragm and bellows types with different pressure-sensing elements and different performance characteristics. Differential pressure controllers are composed of different pressure-sensing elements, principles, and performances.
Then the differential pressure controller should be how selected it. I want to introduce you to the following.
1, the choice of differential pressure switch needs to know the required measurement range, accuracy, and function.
Also, consider what environmental range it is used in, such as combustible toxic, dangerous explosive, etc., should be noted.
3, the physical and chemical properties of the measured medium and the state, such as strong acid and alkali, etc.
4, It needs to understand the measurement of object container structure, size, shape, etc.