Item Type: Pressure Switch Model: LF56 Maximum Ambient Temperature: 66°C 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 media such as air, water, oil, liquid, etc.; chlorine-containing liquids are not suitable Ambient Temperature: -29°C to 66°C for normal operation Medium Temperature: -40°C to 180°C, without freezing MULTIPLE USAGES: This pressure switch is suitable for pressure control, pressure limiting, and alarm applications for non-corrosive liquids, gases, and steam. PRESSURE DETECTION: Detects pressure changes to alter the internal switch state, controlling the ON and OFF operation of the external circuit. SPDT CONTACT TYPE: Single pole double throw contact configuration, suitable for boiler control and water tower pressure regulation systems. WITH PLASTIC COVER: The pressure controller housing includes a plastic cover, allowing visibility of the pressure control point. EXCELLENT MATERIAL: Features a stainless steel pressure diaphragm, brass pressure fitting, and NPT1/4-18 thread. Package Includes: 1 x Pressure Switch 1 x User Manual