Models Designed For Use In Oil Or Gas Space; 100% Tested For Pressure Rate Release Point; Protection And Detection Of Dangerous Sudden Pressure Changes; Devices Calibrated To Quickly Alarm Or Trip During Rapid Pressure Rise Changes; Actuation Only Occurs Based On Rate Of Pressure Rise And Will Not Occur Under Normal Pressure Variations Caused By Temperature Change And Vibration; Can Be Subjected To Full Vacuum Or 20 Psi Positive Pressure Without Damage; Standard Operation From -40 To 180?F ( -40 To 82?C); Special Units Available For Operation At -67?F (-55?C); 100% Factory Calibrated And Tested To Ensure Performance; Units Are Serialized And Calibration Records Maintained; Factory Tested For Switch (Contact) Performance And Response; Field Test Kit Available For Simple Go/No-Go Test To Assure Proper Functionality Of The Device; Multiple Mounting And Calibration Options For Gas Or Oil Applications; Flange Or Thread Mounting Options Available For Vertical Or Horizontal Mounting; Models Calibrated For Proper Response In Gas Or Oil Space Applications; From The Original Creator Of Mechanical Rapid Pressure Rise Relays; Original Creator Of Patented Bellows Technology For Mechanical Rapid Pressure Rise Detection; Over 25 Years Of Experience And Refinement In Rapid Pressure Rise Protection With Greater Than 100000 Units InstalLED