I would like to make the O2 analyzer outlined at
http://spiff.physics.mcgill.ca/scuba/gear/analyser.html, and have acquired
all necessary components except for the DMD 3500-B voltmeter which
distributed by Circuit Test in Canada. Does anyone know of a comparable
voltmeter which I could get in the US, particularly in Fort Lauderdale /
Miami area ? Or a different method to built one which I could obtain parts
in US / Florida ? (as I am visiting the US / Florida for 2 weeks)

I know that I could just use a digital voltmeter to read and convert to FO2,
but I am lazy and don't want to carry an extra calculator. Besides it
introduces an extra human error factor (me!)

TIA,

Phi
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