ITEM NAME:1x Pressure Switch Description: PSI Range: 4.0-12.5; working pressure: 1.25ï ¼Ë†MPaï ¼â€° Contact form: 3-phase Single port This is a great switch for mini air compressor It can help to save electric energy of the air compressor It also can use in water pressure control. And add some accessory; it can be used as boiler alarm apparatus, pressure relief or automatic supply water etc Specification: Model: SG-4A Size: 130MM*90MM*55MM Unit conversion: 1kgf/cm ²=14.2PSI, 1bar=14.5PSI, 1bar=0.1Mpa Rated voltage (V): AC 400V Rated current (A): 25A Pressure adjusted range (Mpa): 1.25 Operating pressure range: 4.0-12.5 Differential pressure range: 2.0-4.0 Connection screw thread: G1/4 Unloading valve type: Coper Unloading valve diameter: Æ6mm Package Includes: 1x Pressure Switch SKU: DMO0008516051009317.It can help to save electric energy of the air compressor. This is a great switch for mini air compressor. Pressure adjusted range (Mpa): 1.25. Unloading valve type: Coper. Differential pressure range: 2.0-4.0.