Model Number: PS-40-EX Item Number: 1350402 The PS40-EX is designed as a pressure type supervisory switch. The NFPA 72, National Fire Alarm Code, requires that a low pressure signal is sent at 10 psi below normal air pressure and 10 psi above normal...

Model Number: PS-10-EX Item Number: 1350102 Designed and approved for use in hazardous locations internationally Weatherproof Two independently adjustable switches, no tools needed Brass pressure connection Solid metal enclosure The Potter PS10-EX...