Patrick,
Are you still selling your kits?
Since I am a total electronics building neophyte, I appreciated the step
by step instructions, plus the price was right.
Wendell G

Patrick Duffy wrote:
> 
> Chris,
> 
> The sensitivity you refer to is likely due to the O2 Hacker design that uses a
> radio (non-linear) potentiometer.  It goes slow on one side and incredibly
fast
> on the other.
> 
> If anyone out there is using a PM128 with the non-linear pot, replace it with
a
> 100 ohm linear pot.  Replace the existing resisitors with a single 360ohm
> resistor and you will get rid of the sensitivity so that it will work just
like
> the commercial units.
> 
> Regards,
> 
> Patrick
> --
> OxyCheq ... your source for oxygen sensors
> http://oxycheq.com
> 
> Chris Elmore wrote:
> 
> > Chris,
> >      I've made a couple and cross checked them against other homemade
> > analyzers and factory made analyzers. All were about the same. My only
> > complaint is the calibration adjustment is too sensitive. You can't beat the
> > price of the homemade ones either. I have the LCD panel, rheostat, flow
> > restrictor (set at 5lpm), battery, switch, and sensor mounted to a piece on
> > aluminum insde an old Pelican case- all for under $100. It just took a rainy
> > day to put it together.
> > C
> > ----- Original Message -----
> > From: Christopher Brown <hokiediver@ya*.co*>
> > To: <techdiver@aquanaut.com>
> > Cc: <vbtech@ci*.co*>
> > Sent: Monday, March 12, 2001 10:49 PM
> > Subject: Homemade 02 analyzers
> >
> > > What is the consensus on homemade 02 analyzers?  Are
> > > they accurate enough?
> > >
> > > What about flow-through vice "plug-in" quick
> > > disconnect type 02 sensors?  What is the accuracy of
> > > the measurement in a flow through vice plug in 02
> > > sensor?
> > >
> > >
> > >
> > > __________________________________________________
> > > Do You Yahoo!?
> > > Yahoo! Auctions - Buy the things you want at great prices.
> > > http://auctions.yahoo.com/
> > > --
> > > Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'.
> > > Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.
> >
> > --
> > Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'.
> > Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.
> 
> << Send subscribe/unsubscribe/help requests to VBTech-request@ci*.=
> com >>
--
Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'.
Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.

Navigate by Author: [Previous] [Next] [Author Search Index]
Navigate by Subject: [Previous] [Next] [Subject Search Index]

[Send Reply] [Send Message with New Topic]

[Search Selection] [Mailing List Home] [Home]