3-1/2" Air Gauge, 0-80/250 PSI/kPA (UL & FM Approved)

The Trerice SGRD80/250 is a 3-1/2" dual-scale air retard sprinkler pressure gauge for dry-pipe fire protection systems, offering readout in both PSI and kPa. The inner scale displays 0-80 PSI and the outer scale shows 0-550 kPa for imperial/metric cross-referencing. The gauge includes a 250 PSI (1720 kPa) retard to safeguard the gauge mechanism against overpressure if water enters the system during a trip or testing event. Constructed with a black polycarbonate case and window, an aluminum white-background dial with black and red graduations, and a 1/4" NPT lower male connection. Wetted parts are bronze Bourdon tube and brass socket. Accuracy is 3-2-3% per ASME B40.100 Grade B. UL-listed (UL-393, US & Canada) and FM Approved (Approval Standard 2311) for fire protection service.

• UL-listed (UL-393, US & Canada) and FM Approved (Standard 2311)
• Air service with 250 PSI / 1720 kPa retard for overpressure protection
• Dual scale: 0-80 PSI (inner) / 0-550 kPa (outer)
• 3-1/2" dial with white aluminum face, black and red graduations
• 3-2-3% accuracy per ASME B40.100 Grade B
• 1/4" NPT lower male connection
• Black polycarbonate case and window
• Bronze Bourdon tube with brass socket wetted parts
• Zero zone indicator on dial
• Maximum operating temperature: 150F (65C)