Low Pressure Nitrogen Purge Alarm A333-N2


Meets all NFPA 99 requirements for purge monitoring, including Military Shock specs.


Our A333-N2 Nitrogen Low Pressure Cylinder Alarm.  The alarm pressure switch is oxygen-cleaned with a set point range of 30 psi low to 600 psi high.  The alarm as set from Med-Con is 200 psig +/- 5 percent. Special order set points are available.  There is a Green blinking “OK” light when gas supply is adequate and a Red blinking “LOW” light when gas supply is low.  In addition, an audible alarm (90 dB) activates when purge gas is low.  The alarm operates on a 9-volt battery, included, which can give up to a year of operation, dependent upon usage.  This alarm has been certified laboratory tested to meet Military Spec MIL-STD-810F (516.5) for shock.

The A332-N2 alarm does not include a flowmeter regulator.

This alarm is for high-pressure cylinders.  An alarm for liquid dewars is available as A333-CRYO for $515.00.

Additional information

Weight 3 lbs
Dimensions 8 × 4 × 4 in