[Stoves] Oxygen Sensors for all combustion...

[Thomas Reed]

Dear Paul and Aul:

We buy "4 wire" oxygen sensors at any automotive store for about $50 
(typically Bosch).  (They may be only three wires with the ground as the 
fourth.) 

Two of the wires are the sensor to be hooked to a sensitive millivolt 
meter.  The other two go directly to the battery and heat the sensor to 
operating temperature. 

The oxygen sensor easily senses rich (>250 mv) vs lean (250 mv) and it's 
a very steep "S" curve at the stoichiometric combustion point.  It is 
usually used as an "on/off" device - too rich and you increase air - too 
lean and you decrease it.    However, if the temperature is well 
controlled the voltage between 500 and 1500 tells you "how rich" - 
slightly (500) to full of tarry compounds (>1000).

Onward, 

TOM REED             BEF

-------- Original Message --------
Subject: 	Re: [Gasification] Oxygen sensors
Date: 	Wed, 7 May 2008 12:02:30 +0200
From: 	Liran Dor <Liran at eer-israel.co.il>
Reply-To: 	Discussion of biomass pyrolysis and gasification 
<gasification at listserv.repp.org>
To: 	Discussion of biomass pyrolysis and gasification 
<gasification at listserv.repp.org>



Paul,
You should look at a  company called "Modcon"  although Israeli based they have rep. In
The states.
If you wish I can provide a contact
We work with and are pleased

Liran Dor
EER 




-----×?×?×?×¢×? ×?ק×?×?×?ת-----
×?×?ת: "Paul S. Anderson" <psanders at ilstu.edu>
×?×?: "GASIFICATION - Listserve" <GASIFICATION at listserv.repp.org>
× ×©×?×?: 07/05/2008 09:35
× ×?ש×?: [Gasification] Oxygen sensors

Hello,

We at Chip Energy are looking for modestly priced oxygen sensors that can give
feedback to a PLC for operation of a gasifier.  The sensor would be in the
chimney.  One recommendation was "big time" at about $3000.  What have the
Gas-L readers found to be appropriate devices and at what price ranges?

Thanks,

Paul
-- 
Paul S. Anderson, Ph.D., Geography professor - Emeritus
Telephone:  USA-309-452-7072 (residence and office)
Internet site:  www.ilstu.edu/~psanders
For my gasifier stoves info, go to:
http://bioenergylists.org/contributors#Paul_Anderson





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