making thermocouple temp probes?

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
--
**********************************************************
Please reply to jsavage"at"airmail.net.
Curse those darned bulk e-mailers!
**********************************************************
"Rats and roaches live by competition under the laws of
supply and demand. It is the privilege of human beings to
live under the laws of justice and mercy." - Wendell Berry
**********************************************************
.

Relevant Pages

  • Re: making thermocouple temp probes?
    ... > I've got some 1/8" OD 316 stainless tubing on order from ... > 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. ... > live under the laws of justice and mercy." ...
    (sci.electronics.basics)
  • Re: Repair of idiotic plastic pipe implementation on the Brewtus
    ... to use 6 inches of copper tubing for this line? ... I've also used this tubing with compression fittings to run ... Flare tubing is very common in the auto industry where it's used ... in the fitting to which the plastic tube is attached. ...
    (alt.coffee)
  • Re: Repair of idiotic plastic pipe implementation on the Brewtus
    ... to use 6 inches of copper tubing for this line? ... I've also used this tubing with compression fittings to run ... Flare tubing is very common in the auto industry where it's used ... in the fitting to which the plastic tube is attached. ...
    (alt.coffee)
  • Re: Oscar help-Jack or anyone?
    ... (which is the same as the one that comes "free" with the ebay PIDs) ... > parallel pipe thread coupling for a 1/16" probe. ... > heard people say that you can force NPT fittings into BSPP housings, ... > female BSPP "extension" and then try it on that though, ...
    (alt.coffee)
  • Pondering Drip Irrigation Setup
    ... Wanted to ask the collective wisdom of the group about drip irrigation. ... the tube is a pain in the neck. ... in mulch, prolly pea gravel) and using fittings like these, ... means I'd have to drill and tap holes in the PVC wherever I needed a drip ...
    (alt.home.repair)