This product is part of the NEMA Pressure Switches range, an offer of electromechanical pressure switches. This electromechanical pressure switch has normally closed - normally opened, SPDT (single pole double throw), form C, snap action contacts and a range on decreasing pressure of 1psi to 40psi. This industrial pressure switch with an approximate adjustable differential at midrange of 1.2psi to 3.6psi and a maximum pressure of 100psi. It is furnished with screw clamp terminals for electrical connection and 0.25inch 18 NPTF for fluid connection. This switch has a diaphragm actuator which can be operated from any position, adjustable differential scale for internal settings and regulation of 2 thresholds. Offers mechanical durability of about 5 million operating cycles. The enclosure is made of thermoplastic. It is available in size of 2.21inch (W) x 2.75inch (D) x 6.94inch (H) and weighs 2lb. It is suitable for pressure controlling or monitoring of water pumps, compressors, agricultural/irrigation water systems, molding presses, injection molders, grinding machines, machining centers, complex and special machines. It is a NEMA 1 rated product. This product is certified by UL, CSA, CE. Meets UL 508 standards. Single stage pressure switch is control circuit rated device used in pneumatic or hydraulic systems on a wide variety of machine and process applications to protect the equipment and control or monitor the system pressure. This product is certified by CE, CSA and UL. It meets CSA C22.2 No 14 and UL 508 standards. A complete line of electromechanical switches to monitor and control pressure conditions for industrial and end-user applications. The Square D brand water pressure switch has expanded to industry leading Pressure Sensors and Switches.