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From: Paul Harris <crestnich@at*.co*.uk*>
To: "'Techdiver'" <techdiver@terra.net>
Cc: "'Lawrence Orchard - Work'" <loz@si*.co*.uk*>
Subject: O2 measuring.
Date: Tue, 29 Oct 1996 13:33:28 -0000

I have had a post by Ken Sallot copied to me regarding using a digtal =
voltmeter to measure  the output of an Oxygen cell. Some simple =
calculation was then done on the o/p voltage given to convert it to an =
O2 concentration. All this, of course, was done following the usual =
calibration procedures.

I have a couple of questions regarding this.
1) How linear is the o/p from these cells?
2) Has anyone done the calculations electronically, ie used an amplifier =
to boost the o/p. eg the 11.7mv reading given in the example to 21( =
20.9) mv
for air. ( Other than in a proper O2 meter of course.)

Is it worth re-inventing this wheel? We pay approx 200UKP ($300) over =
here, for the whole lot. But I already have a DVM, and I believe the =
cells are approx 40 UKP.
rgds
Paul

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