Intermediate Low Pressure Nitrogen Purge Alarm A333-N2R Kit


NFPA 99 mandates the continuous monitoring of purge gas during the brazing process and the requirement of an oxygen analyzer to verify the effectiveness of the purge.

This Advanced Kit meets these requirements, which includes the A333-N2R Low Pressure Purge Alarm with Regulator Flowmeter supplied in a Heavy Duty Carrying Case.





Included in this Intermediate Kit:

Our A333-N2R Nitrogen Low Pressure Cylinder Alarm with Regulator Flowmeter.  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 Regulator Flowmeter is preset at 20 psi with a flow capacity of 100 SCFH.  The regulator/flowmeter hose connection is 5/8″-18 Right Hand External “B”.   An adapter is included to convert this regulator/flowmeter connection to 1/4″ NPT Male.

A Heavy- Duty Polypropylene Case with rubber seals and polyurethane foam lining protects your investment.  This case is watertight, dust-tight and impact resistant. Outside dimensions are 6″ H x 11-3/8″ W x 13-1/2″ L.  Locks are not included.

This alarm is for high-pressure cylinders.  See our A333-CRYO for cryogenic applications.

Additional information

Weight 10 lbs
Dimensions 13 × 13 × 7 in

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