SA1111E-S5-K2, Series SA1100 Diaphragm Operated Pressure Switche, 10-150 psig, Snap Action Switch, 316SS/Fluorocarbon/Fluorocarbon, SPDT Switch & 1/2" Female NPTFeatures:Explosion-proof and weatherproof housing provides device protection for outdoor use or harsh environment operationBurst pressure protection prevents device failure where high-pressure surges may damage device costing down-time and repair/replacementAdjustable deadband reduces equipment cycling and potential failureVisible set-point and deadband adjustments provide an easy and fast check without having to open device causing dangerous conditions to operatorsThe Series SA1100 Diaphragm Operated Pressure Switches are weatherproof and explosion-proof in one economical enclosure. Extremely rugged construction assures excellent reliability in chemical, petroleum and industrial plants. New design also provides burst pressure protection to 3000 psi (206 bar). The rolling diaphragm design maintains a constant effective area to minimize friction. This results in a minimum deadband as low as 5% of full-scale. Since many applications require higher deadbands, the SA1100 includes a separate adjustment of this when necessary. A pump being used to control liquid level in a tank would be a typical situation where this feature would be important. Both setpoint and deadband adjustments are protected, yet clearly visible behind a clear polycarbonate window and are fully isolated from the electrical components for additional safety. A 7/16" open-end wrench is the only tool required to change settings. Terminal blocks are provided for switch wiring connections and both internal and external ground screws are included. Standard housing is weatherproof to NEMA standards 1 through 4X and 13; explosion-proof to NEMA 7, Class I, Groups B, C & D; NEMA 9, Class II, Groups E, F & G. Optional construction adds drain to meet NEMA 3R IP54.Applications:Chemicalpetroleumfood and drug processing industriesUsed indoor, outdoor or in explosion-proof areaPump control.