Hazardous Location Pressure, Differential Pressure and Temperature Switches

12 Series Vibration Resistant, SS316 Pressure, Differential Pressure and Temperature Switches
120 Series Rugged, Explosion Proof Pressure, Vacuum, Diff. Pressure & Temperature Switches
117 Series Hermitically Sealed Pressure, Vacuum, Differential Pressure & Temperature Switches

http://www.ueonline.com/products/prod_hazard.htm