Re: making thermocouple temp probes?


"JazzMan" <No_Spam@xxxxxxxxxxx> wrote in message
news:426BF1FB.36DB@xxxxxxxxxxxxxx
> I've got some 1/8" OD 316 stainless tubing on order from
> McMaster-Carr, already have some thermocouple wire rated
> for 2K°F, and will be buying some fittings for mounting
> the probes in the exhaust manifold of my engine. My thought
> was to TIG one end shut on a 2" length of the tube and use
> a stainless compression fitting to lock the probe in place.
> I have several questions. One is, do I need to pot the
> thermmocouple wire inside the tube? If so, with what? Would
> it matter if the potting agent was conductive? Do I need to
> somehow weld the thermocouple junction to the end of the
> tube being used as the probe body? Or would simple contact
> be suffient?
>
> For reference, the engine's been modified and I've been
> editing the fuel maps in the ECM. Knowing the EGT at
> individual cylinders allows me to address flow balance
> issues in the intake manifold, for instance.
>
> JazzMan
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The exact TC you need are available commercially, normally they are sold
with a plug connector.

Jack


.

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