NFPA-99 requires that your nitrogen purge gas must be verified prior to brazing.

How do you do that?  A portable oxygen analyzer will read 0% oxygen in a fully purged nitrogen line.

We have found two inexpensive oxygen analyzers that will suit your needs. 

Click on the pictures for more info.

For Sale in our on-line store:  www.Shop.TheMedicalGas.com


Oxy-Cheq                                                                Maxtec Handi+