Item Type: Pressure Switch Model: LF56 Maximum Ambient Temperature: 66 Maximum Load: 15A 250VAC Maximum Diaphragm Pressure: 350psi Pressure Range: 20-300psi / 0.14-2.0MPa Pressure Difference Range: 20-50psi / 150-350kPa Interface Thread: NPT1/4-18 Contact Type: SPDT Contact Method: Single Pole Double Throw Diaphragm: Stainless Steel Interface: Brass Working Medium: Non-corrosive medium such as air, water, oil, liquid, etc., and chlorine-containing liquid is not available Ambient Temperature: -29~66 normal operation Medium Temperature: -40~180 without freezing 1MULTIPLE USAGES: The pressure switch is suitable for pressure control, pressure limiting, and alarming of non-corrosive liquids, gases, and steam. 2PRESSURE DETECTION: By detecting changes in pressure, it alters the state of the internal switch to control the ON and OFF action of the external circuit. 3SPDT CONTACT TYPE: Single pole double throw contact method, can be used for boiler control and water tower pressure regulation system. 4WITH PLASTIC COVER: The pressure controller shell is equipped with a plastic cover, allowing observation of the pressure control point at any time. 5EXCELLENT MATERIAL: The pressure diaphragm is constructed of stainless steel, the pressure joint is made of brass, and the thread is NPT1/4-18. 1 x Pressure Switch 1 x User Manual