Explosion proof, U.L.&CSA certified, suitable for Class I, Groups B, C&D and Class II, Groups E, F&G. H-2 pressure switches are designed to perform two different actions continuously when liquids or gases rise or fall. The patent design includes two concentric pistons operated by a single diaphragm and a single pressure chamber. Each piston drives a separate switch. These two switches can be adjusted to operate simultaneously at opposite ends of the range or at two set points in the middle of the range. When adjusting or servicing the switch on site, simply remove the threaded top end and it will not affect the electrical or pressure connection. This Duotech switch can be explosion-proof and weather resistant. It can be installed in any position and is not affected by vibration.

●  Explosion-proof and weatherproof housing provides device protection for outdoor use or harsh environment operation

●  UL listed, CSA approved to support rigorous process applications and regulations

●  Independent piston action design for either gas or liquid allows switches to active together or independently based on settings

●  Mounting in any position and not affected by vibration provides reliable switching for equipment