High Performance Safety Protection: this air compressor pressure switch is rated for 135-175 PSI, features 4 ports, a 20 A rating, and operates on a 110-120V current; It is equipped with a 200 PSI brass safety valve and a 0-200 PSI pressure gauge; It turns on the compressor at 135 psi and turns off at 175 psi, eliminating the risk of overload and providing safe and stable start stop control
Four Ports Design, Universal Npt 1/4" Interface: the air pressure switch features four 1/4 inch NPT female threaded interfaces, which are compatible with a variety of pneumatic components, including pressure gauges, safety valves, and air outlets; It offers flexible installation and easy expansion; The 1/4" interface is suitable for most two stage and single-stage air compressors or DIY pneumatic systems
Precise Pressure Regulation with Flexible Adjustment: This 4 port pressure switch is factory preset to 135–175 PSI and can be fine tuned using the red lever to adjust the cut in/cut out pressure. It is equipped with a 0–200 PSI calibrated pressure gauge with a reading error of less than ±3%, enabling real-time monitoring of pressure changes and preventing errors
Excellent Quality, Stable and Durable: our control switches feature a high strength plastic housing and alloy base, with safety valves made from brass material; They are corrosion resistant and age resistant, capable of repeated use, ensuring stable operation even under long time high frequency use
Complete Kit for Quick Installation: Includes a pressure switch, gauge, unloading valve, and plug & fitting kit. Plug and play—installation in 5 minutes. Plugs seal unused ports, fittings extend or connect pipes, and the hex wrench ensures easy setup. Perfect for professional or DIY air compressor and water pump maintenance