Napa sells O2 Sensors -  A common one is the 1 volt model  OS100
Which most of the older GM's Used.  Its output is .20 volts  to 1.0 volts
Normally,  .80 to .85  depending on the application and conditions.
They have single lead, two lead, three lead sensor in stock.

I just bought a few of the OS100 's  for 18.95 each.


On the other hand, I'm looking for o2 sensors  that go from 0% to
25% or so, ofcourse it will be spanned for 20.9

The ones I have been using are $150 each, and have an output of
.0315 @ 21% O2.   This is not bad, but the price is High, its has
cheap construction and short life, and hard to get.  I found one I really
like but they will not sell it to me unless I send the meter in for repair.
It has a real dependable, accurate, long life cell for 75.00  I snatched
one from a meter and used in my setup with great success, but the manufactor
sent my meter back and said they had to have the old cell in order to give me

a new one.  These people are so paranoid its unreal.  They won't even sell
parts
unless you ship it back to them (not warranty).    Reverse engineering was
simple.
They used a small op amp, a adjustable voltage ref to a 7106cpl then to the
led's
Even though they tried to buff off all the part numbers,  just take a damp
cloth
and wipe the chip and the part numbers show back up  (neat trick).  The 10k
Multiturn pot adjust gain for calibration.  Mine was the same exact setup
before
I ever seen theirs.


Richard Skinner
rwskinner@worldnet.att.net

----------
> From: John Griessen <john_g@CIBOLO.COM>
> To: PICLIST@MITVMA.MIT.EDU
> Subject: Re: [OT] CO sensors - old thread, new source
> Date: Tuesday, January 06, 1998 9:47 PM
>
> richard skinner wrote:
>
> > Do know of any other Gas Sensor Companies?  I'm also looking for
> > readily available O2, CO, NO, NO2 Sensors,  4-20 ma or mv output.
>
> I'd like to know who makes the automotive oxygen sensors because I have an
> application in mind of controlling the atmosphere in a kiln as well as the
> temperature to get better repeatability in firing color glazed pottery.  An
> oxygen or CO sensor designed for operation in a combustion zone is what I
want.
>
> John Griessen
> Austin TX
> john_g@cibolo.com