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Mailing List: cavers

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Hello Everyone,
    I decided to take the plunge and build my own O2 analyzer. The one I

had been using has gone belly up.
    Using the parts list from the "Oxygen Hacker" and a similar list
from Jim Cobb's web page, I ran up to my neighborhood Radio Shack. To my

surprise I was able to locate everything...........well almost!!!!!!!
    The digital panel meter that is called for is PM-128 or equivalent.
I believe PM-128 is a part number for a supplier called All Electronics.

Does anyone know what to right  RS part number might be? They have
several in there catalog and I want to order the right one. If another
meter can be used, how would it be modified?
    Thanks for your help, Al

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