Low Pressure Nitrogen Purge Alarm A333-N2


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

Due to overwhelming demand for this product, only phone  orders accepted.


The alarm is factory assembled of a rugged aluminum base and PVC enclosure and utilizes a pressure switch with a rating of 3000 psi. 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 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.

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