Alarm Gauges 4285-9B


The 4285-9B inertrol alarm gauges are designed to alert the user when pressure has fluctuated ±90 PSIG from the 300PSIG factory setting. Under these conditions, electrical contacts in the switch will close and set off a user-furnished alarm system.


  • Solid brass gauge casing resists corrosion and provides for longer life.
  • Equipped with a heavy-duty, 36” long, 3-wire electrical cable.
  • Each gauge is factory pre-set at 300 PSIG, then sealed to help prevent against tampering once in service.
  • Electrical circuit is rated for a maximum of 3 AMPS at 460 volts AC.


Gauge Casing.................Brass