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EGT/CHT thermocouple cable

 
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JohnT(at)comp-sol.com
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PostPosted: Tue Jan 24, 2006 1:30 pm    Post subject: EGT/CHT thermocouple cable Reply with quote

Does anyone know of a source for twisted pair stranded non sheathed J &
K thermocouple cable (extension grade is fine)- with tefzel insulation?
Also what is being used to provide connect/disconnect capability?

Thanks,

John


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nuckollsr(at)cox.net
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PostPosted: Tue Jan 24, 2006 1:46 pm    Post subject: EGT/CHT thermocouple cable Reply with quote

At 03:29 PM 1/24/2006 -0600, you wrote:

Quote:


Does anyone know of a source for twisted pair stranded non sheathed J &
K thermocouple cable (extension grade is fine)- with tefzel insulation?
Also what is being used to provide connect/disconnect capability?

http://www.omega.com/pptst/EXGG_JX_WIRE.html

http://www.omega.com/pptst/EXGG_KX_WIRE.html

http://www.omega.com/pptst/GMP.html

Bob . . .
< What is so wonderful about scientific truth...is that >
< the authority which determines whether there can be >
< debate or not does not reside in some fraternity of >
< scientists; nor is it divine. The authority rests >
< with experiment. >
< --Lawrence M. Krauss >


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rd2(at)evenlink.com
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PostPosted: Tue Jan 24, 2006 2:41 pm    Post subject: EGT/CHT thermocouple cable Reply with quote

I didn't ask the question, but was about to.
Thanks, Bob!
Rumen

do not archive

_____________________Original message __________________________
(received from Robert L. Nuckolls, III; Date: 03:45 PM
1/24/2006 -0600)

<nuckollsr(at)cox.net>

At 03:29 PM 1/24/2006 -0600, you wrote:

Quote:


Does anyone know of a source for twisted pair stranded non sheathed J &
K thermocouple cable (extension grade is fine)- with tefzel insulation?
Also what is being used to provide connect/disconnect capability?

http://www.omega.com/pptst/EXGG_JX_WIRE.html

http://www.omega.com/pptst/EXGG_KX_WIRE.html

http://www.omega.com/pptst/GMP.html

Bob . . .
< What is so wonderful about scientific truth...is that >
< the authority which determines whether there can be >
< debate or not does not reside in some fraternity of >
< scientists; nor is it divine. The authority rests >
< with experiment. >
< --Lawrence M. Krauss >




--


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aadamson(at)highrf.com
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PostPosted: Tue Jan 24, 2006 3:35 pm    Post subject: EGT/CHT thermocouple cable Reply with quote

Mcmaster carr also carries these. Page 527 of the current website or search
for thermocouple wire. I didn't check to see who's prices were cheaper.

Alan

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wschertz(at)ispwest.com
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PostPosted: Tue Jan 24, 2006 3:36 pm    Post subject: EGT/CHT thermocouple cable Reply with quote

McMaster Carr
Bill Schertz
KIS Cruiser # 4045
---


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sportav8r(at)aol.com
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PostPosted: Wed Jan 25, 2006 8:31 am    Post subject: EGT/CHT thermocouple cable Reply with quote

Wonder why they don't list J-type male connectors?

-Bill B

do not archive

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nuckollsr(at)cox.net
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PostPosted: Wed Jan 25, 2006 8:50 am    Post subject: EGT/CHT thermocouple cable Reply with quote

At 11:27 AM 1/25/2006 -0500, you wrote:

Quote:


Wonder why they don't list J-type male connectors?

-Bill B


Go to the Part Number Builder box further down and
it will let you order a GMP-J-M for $2.50.

Bob . . .
Quote:
>
>
>Does anyone know of a source for twisted pair stranded non sheathed J &
>K thermocouple cable (extension grade is fine)- with tefzel insulation?
>Also what is being used to provide connect/disconnect capability?

http://www.omega.com/pptst/EXGG_JX_WIRE.html

http://www.omega.com/pptst/EXGG_KX_WIRE.html

http://www.omega.com/pptst/GMP.html

Bob . . .
< What is so wonderful about scientific truth...is that >
< the authority which determines whether there can be >
< debate or not does not reside in some fraternity of >
< scientists; nor is it divine. The authority rests >
< with experiment. >
< --Lawrence M. Krauss >

--



Bob . . .
< What is so wonderful about scientific truth...is that >
< the authority which determines whether there can be >
< debate or not does not reside in some fraternity of >
< scientists; nor is it divine. The authority rests >
< with experiment. >
< --Lawrence M. Krauss >


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sportav8r(at)aol.com
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PostPosted: Wed Jan 25, 2006 6:47 pm    Post subject: EGT/CHT thermocouple cable Reply with quote

I didn't see that; thanks for pointing it out.

Don't I recall from somewhere that it's okay to use, say, crimp-on molex pins on the appropriate extension wires, as long as a certain symmetry of junctions in the cable run is maintained? I think that's how i extended by GRT probe wires ages ago, and it _seems_ to work okay.

-Bill

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nuckollsr(at)cox.net
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PostPosted: Thu Jan 26, 2006 4:59 am    Post subject: EGT/CHT thermocouple cable Reply with quote

At 09:45 PM 1/25/2006 -0500, you wrote:

Quote:


I didn't see that; thanks for pointing it out.

Don't I recall from somewhere that it's okay to use, say, crimp-on molex
pins on the appropriate extension wires, as long as a certain symmetry of
junctions in the cable run is maintained? I think that's how i extended
by GRT probe wires ages ago, and it _seems_ to work okay.

As long as your T/C wires are 20 or 22AWG, you can run them through
ordinary D-sub connectors . . . SOLID MACHINED pins preferred. While
the pins for a D-sub are NOT identical to the thermocouple wires being
joined, they insert a pair of equal but opposing parasitic thermocouples
into both leadwires. The parasitic thermocouples cancel each other out
because they are in such close proximity to each other and have a common
local temperature.

Bob . . .


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recapen(at)earthlink.net
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PostPosted: Thu Jan 26, 2006 6:23 am    Post subject: EGT/CHT thermocouple cable Reply with quote

Quote:
From an earlier post, I understood that this would not be applicable to a firewall situation as the temperatures are different on either side of the firewall.

Somebody keep me honest here........

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JohnT(at)comp-sol.com
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PostPosted: Thu Jan 26, 2006 7:06 am    Post subject: EGT/CHT thermocouple cable Reply with quote

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PostPosted: Thu Jan 26, 2006 7:35 am    Post subject: EGT/CHT thermocouple cable Reply with quote

John,

You mustr have a bad ground or your RF interference is something else!!!

Chuck Jensen
Do Not Archive

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JohnT(at)comp-sol.com
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PostPosted: Thu Jan 26, 2006 8:14 am    Post subject: EGT/CHT thermocouple cable Reply with quote

Bob,

The cable referenced is not Tefzel insulated. The have Teflon PFA (Perfluoroalkoxy) or FEP (Fluorinated Ethylene Propylene). Tefzel is ETFE (Ethylne TriFluoroEthylene).

Also - note that the only stranded wire listed in this reference is PVC.

I called Omega and talked with John Bach (I think he is in pre-sales support) and he said they don't make thermocouple wire with Tefzel insulation. I could custom order if 25K ft or more was needed Surprised). He's a nice guy and suggested: http://www.omega.com/pptst/TFIR_CH_CI_CC_CY_AL.html It's not stranded either.

McMasterr-Carr on Pg 527 per Alan K. Adamson's post.... does sell FEP stranded type J & K in 20awg. I don't know if it's twisted however.

I'll contact Omega again - appreciate any other insights.

BTW - Omega sells Sub-D type thermocouple alloy pins and sockets. http://www.omega.com/ppt/pptsc.asp?ref=SM_SUB-D_CONN&Nav=temg12

John

Time: 01:46:05 PM PST US
From: "Robert L. Nuckolls, III" <nuckollsr(at)cox.net>
Subject: Re: EGT/CHT thermocouple cable



At 03:29 PM 1/24/2006 -0600, you wrote:

Quote:


Does anyone know of a source for twisted pair stranded non sheathed J &
K thermocouple cable (extension grade is fine)- with tefzel insulation?
Also what is being used to provide connect/disconnect capability?

http://www.omega.com/pptst/EXGG_JX_WIRE.html

http://www.omega.com/pptst/EXGG_KX_WIRE.html

http://www.omega.com/pptst/GMP.html

Bob . . .


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nuckollsr(at)cox.net
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PostPosted: Thu Jan 26, 2006 10:37 am    Post subject: EGT/CHT thermocouple cable Reply with quote

At 09:22 AM 1/26/2006 -0500, you wrote:

Quote:

<recapen(at)earthlink.net>

>From an earlier post, I understood that this would not be applicable to
a firewall situation as the temperatures are different on either side of
the firewall.


Quote:
Somebody keep me honest here...


We're talking apples and oranges here.

(1) D-subs can be a useful means for providing
convenience disconnects in thermocouple lines.

(2) D-subs are not suitable for firewall penetrations.
You can use a d-sub either forward or aft of
a protected penetration, just don't depend on
it for BOTH convenience disconnect AND
protected penetration.

Bob . . .

< What is so wonderful about scientific truth...is that >
< the authority which determines whether there can be >
< debate or not does not reside in some fraternity of >
< scientists; nor is it divine. The authority rests >
< with experiment. >
< --Lawrence M. Krauss >


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recapen(at)earthlink.net
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PostPosted: Thu Jan 26, 2006 10:50 am    Post subject: EGT/CHT thermocouple cable Reply with quote

Thanks - I knew there was a reason I wasn't gonna do it that way........

Worth the price of my list donation once again........

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