Types of pressure switches
How it worksWhen the pressure in the system is higher or lower than the rated safe pressure, the disc in the sensor moves instantaneously, and the switch open or close by Pushing of connecting guide Rod,When the pressure drops to or rises to the rated value, the disc reset instantly , and the switch reset automatically , or simply when the measured pressure exceeds the rated value, the end of the elastic element will be displaced and pushing the switch element directly or after comparison to change the on-off state of the switch .the elastic element could be the single coil spring tube, the diaphragm, the bellows and so on.
Main features
1.Inch pipe thread connection or copper pipe welding structure make installation flexible, easy to use.
2.Pressure with Insert piece or wire connection are optional
3.Sealed stainless steel inductor is safe and reliable
4.The pressure range can be manufactured according to any pressure value selected by the user.
Classification
1.Explosion Proof type
explosion-proof pressure switch can be used in explosion area and strong corrosive atmosphere.The use grade of it is EXD II CT1 ~ T 6,Imported one must pass ul, CSA, Ce and other international certification.explosion-proof pressure switch could offer different pressure, differential pressure, vacuum and temperature ranges. Common used on power, petroleum, chemicals, metallurgy, boilers, food machinery, environmental protection equipment and other industries.
2.Mechanical pressure switch
Mechanical deformation push the action of Microswitch,When the pressure increased, Pressure Sensing Element(diaphragm,bellows ,Piston) will deform and move up, through the mechanical structure such as balustrade spring, and finally start the micro-switch at the top, so as to make the electric signal output.setment of the pressure switch is divided into continuous displacement type and force balance type.
3.Electronic type
The other one which is more popular in the market these years is the electronic pressure switch, used to replace the electrical contact pressure gauge and used in industrial control system needs higher requirements.This kind of pressure switch has precision pressure sensor inside, amplifies pressure signal through high precision Instrumentation amplifier, collects and processes data through high speed MCU, generally uses 4 bits LED real-time digital to display pressure, upper and lower control points of relay can be set freely with small hysteresis, anti-vibration, fast response, stable and reliable, high precision(The accuracy is generally 0.5% F. S, up to 0.2% F. S. .)The return difference setting can effectively reduce the repetitive action caused by the pressure fluctuation, and protect the control equipment,.This kind of pressure switch is a high-precision equipment to detect the pressure and the level signal, and realize the monitoring and control of the pressure and the level.Features: Electronic display is intuitive, high precision, long service life, convenient, but relatively high price, power supply.
