Technical parameters of SOR differential pressure switch:
The maximum working pressure ranges from 3 to 500 PSI
• Adjustable set point
• Suitable for operating conditions with sudden changes in system static pressure
• 15amps@250VAC
•CSA, CE
•NEMA 4, 4X, IP65
The model of differential pressure switch for the American Sol 101 121 series
101NN-K3-N4-C1A 101NN-K45-N4-C1A
121NN-K45-N4-C1A 101NN-K3-M4-C1A
101NN-K45-M4-C1A 121NN-K45-M4-C1A
101L-K3-N4-C1A 101L-K45-N4-C1A
121L-K45-N4-C1A 101AG-EF3-N4-C1A
101AG-EF45-N4-C1A 121AG-EF45-N4-C1A
101L-K3-M4-C1A 101L-K45-M4-C1A
121L-K45-M4-C1A 101AG-EF3-M4-C1A
101AG-EF45-M4-C1A 121AG-EF45-M4-C1A
BH-603002-603 426144-N8E244
BH-013062-013 BH-009009-009
BH-031001-031 BH-009002-009
Selection of differential pressure switch diaphragm
Differential pressure switches are divided into three categories: diaphragm, bellows, and piston. The characteristics of diaphragm switches are good universality, multiple choices, and strong comprehensive performance; The advantage of welding stainless steel is zero leakage; The characteristic of corrugated pipes is small dead zone and high precision; The characteristic of the piston is high pressure resistance.

debugging method
Differential pressure switches are generally divided into two types: internally adjustable and externally adjustable. External adjustable switches may reduce the risk of misoperation, but their monopoly is not convenient. Explosion proof areas cannot be debugged on site, while external adjustable switches are easy to operate. Explosion proof peripherals can be debugged on site. However, the selection space is usually small, and models are often not available for use, resulting in high costs.
Working principle of Saul differential pressure switch　　
The differential pressure switch consists of two bellows chambers, each sealed by two sealing membranes and one differential pressure sensing membrane. The high and low pressure enter the high and low pressure chambers of the differential pressure switch respectively, and the perceived differential pressure causes the pressure sensing film to deform. Through mechanical structures such as railing springs, the micro switch at the top is finally activated to output electrical signals.