Q: about various types of EGT probes.

[Steve.Flanagan at VerizonWireless.com]

Everyone uses K-type that I know, the type dictates the temp range as well
as the linear response of the type thermocouple.  K-type is good upto about
2000 deg F.  

What are you going to read the sensor with, its not as simple as just
measuring voltage.  A circuit has to be used that measures the junction as
well as compensates for temp of the op amps being used.  I looked into it
several years ago, not rocket science, but is not trivial either.
Thats the extent of my knowledge on it for now.  5 years ago I looked into
building one, I wound up buying one instead.  There is plenty of info on the
net regarding using these devices, start with www.OMEGA.com and look at
their data sheets.

Here is one site I remember:
http://www.dataforth.com/catalog/doc_generator.asp?Path=intro.signal.html


Check out some data recorder companies and you can see what they are using.
RACEPAK.com, Corsa-Inst.com, Autometer, etc...

SF


-----Original Message-----
From: Matt Smith [mailto:mdsdm at yahoo.com]
Sent: Thursday, September 06, 2001 3:13 PM
To: diy_efi at diy-efi.org; Diehl, Jeffrey
Subject: Re: Q: about various types of EGT probes.


Those are thermocouple types.

--- "Diehl, Jeffrey" <jdiehl at sandia.gov> wrote:
> Hi all,
> 
> I'm looking into putting one or more exhaust temp probes in one of my
cars.
> While pricing the probes, I was asked what type of probe I need.  Quick
> research on the Web revealed that these probes are designated as K-type,
> J-type, N-type, etc.  Does anyone know what this refers to?  Is it form
> factor, or electrical characteristics, for example?
> 
> Any source of information on the topic would be most appreciated.
> 
> Thanx,
> Mike Diehl,
> 
> 
> 
> 
>
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