WOODMAN
Contributor
I am pursuing getting a Analox CO monitor, and in my research I have noted that there is a sealing plug available for the O2 tester which is supposed to extend sensor life. Does this plug work on the CO tester also? And it useful to use it on a CO tester? Also, I read somewhere that the testers now come with these plugs, so why are they available for sale everywhere? Replacement, or are they really optional? Woody