HLP Series Pressure Switch HLP Series Pressure Switch is used for high and low-pressure limit control of refrigeration equipment or automatic system air conditioning equipment. Standard models are used for non-corrosive media such as fluoro chloride, air, liquid, etc., and there are also special specifications for refrigerants such as ammonia (allow fluid temperature -10-100℃). In addition, the international standard mounting bracket is provided for easy installation. The working principle of the HLP Series Pressure Switch: when the pressure increases, the action on the different sensing pressure components will produce deformation, will move upward, through the railing spring, and finally start the micro switch at the top end, the electrical signal output. HLP Series Pressure Switch’s new micro-switch design ensures the reliability of the switching function. https://www.stnc-pneulead.com/product/pressure-switch/hlp-series-pressure-switch.html