EGT bits

[Joe Boucher]

How many hours do the egt sensors last?

Joe Boucher
'70 RS/SS Camaro   '81 TBI Suburban

garfield at pilgrimhouse.com wrote:

> Say, whilst we're on the subject of mixture & exhaust gas, etc. I thot
> some on the list might be interested in some stuff we found for our
> aviation group. For those of you who plan on instrumenting your engines
> with EGT also, they are universal sensors on aviation engines, due to
> the goodly amount of lead still in std av-gas 100LL (hence, no O2
> sensors or closed-loop mixture control). We use EGT to lean to near-peak
> at altitude via a manual mixture control. Flintstones technology but
> dirt simple, which is what ya want when you're tripping the light
> fantastic.
>
> Anyways, there's a nice chip from Analog Devices with just about as
> complete a thermocouple interface as you could ask for (handles J or
> K-type; sadly not R-type), and also a reference to some thermocouple
> bits.
>
> A single-chip complete EGT interface that will allow you to cheaply run
> a thermocouple in EACH exhaust outlet at about $20 per cyl. for
> electronics. Take a look at Analog Devices part no. AD597 at:
>         http://www.analog.com/pdf/ad596_7.pdf
> and for inexpensive EGT probes, and everything else needed to wire up
> EGT sensors, go to:
>         http://www.exhaustgas.com/
> and clik on the "Performance Catalog" button, then go to "Sensors". I've
> actually seen K-type probes even cheaper, so this isn't the last word. I
> think I saw some non-STC'd ones in Chief Airparts' catalog, but I dunno
> fersure. To check out thermocouple extension wires, & the correct
> connectors to use with thermocouple wiring, clik on the "Industrial
> Catalog" button instead. There's even a nice little tutorial on EGT
> thermocouples if you're unfamiliar with their unusual wiring issues.
>
> Bon appetit.
>
> Garfield