Thermocouple's - School me

Not much I can do this late at night but I can call my supplier in the am and see if they can cross it for me and get me the type and range. K types are most common (every aftermarket exh. temp gauge uses them and as does the R&D world) but they make, B, E, J, K, N, R, S and T variations.

Heat range isnt a big deal just have to find one with the same voltage scale 0*c is almost always a 0mv reference but the upper end is where the differences are some go up to 1370*c and are around 50mv at that temp. The scale has to match or it wont output the right voltage per temp based on what the cal/computer is programmed.

Can you measure the sheath diameter and can you tell what material it is? Stainless, Inconnel and Clad is most common pending on material and diameter I can get a approx max range to help with the reference.
 
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The sheath is the part that would slide thru the fitting that holds it in place, it would be best measure about a inch from the end that goes into the exhaust/header tube (opposite of the wire leads) measure it with a pair of vernier calipers or micrometer. Can you take a picture of the actual one from your car and post it. What year and model is your lambo so i can try and figure out which company supplies the thermocouples for lambo.
 
Can you get a photo of the actual part you have? That would be helpful...I've got tons of them, however they're what I would call raw??? Meaning that we weld a fitting and put the sensor in the fitting. If yours is part of a vehicle it may be more "customized" to fit.
 
I can give you a new sensor, the issue I think you will have is that connector is not the usual type of connector.
That's how they get you...Unless you decide to modify the wiring in the harness to adapt a new type sensor.
Still need to see what you have up close, to determine the exact type you need. Type meaning K, J, T, etc....
 
I'm waiting to hear back from InstruCon who now owns Barber Colman which is the original manufacturer I believe. You may be able to order the exact part from a distributor for cheaper than these sites are selling it for.
 
OMG ITS BEAN said:
I'm waiting to hear back from InstruCon who now owns Barber Colman which is the original manufacturer I believe. You may be able to order the exact part from a distributor for cheaper than these sites are selling it for.
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See what this guy says, if you can get that original type it will be easiest...
Else, it is a K-type TC and they are plentiful.
The braided jacket helps keep the heat off the wires, the spring helps isolate it from vibration. I think you said this is from an exhaust manifold or header, correct?
I can get you a new one if you need, then you'll just have to wire it up and install it.
 
That's the longest sheath I've ever seen on a thermocouple lol. Looks like a standard K type to me can prob order on thru omega if we can figure out the sheath material. I'll text Bean and see if he ever heard back from Instrucon.
 
white out said:
The part of the sheath that's actually in the exhaust is between 3" and 3.25" long.
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I wonder why they put one in there with a 18" sheath, I noticed the compression fitting was only a few inches from the end so figured it wasn't needed for it to be so long. BTW I can get a 18" one that is a exact replacement of that one for 40 bucks thru omega assuming its a grounded tip and is clad material.



Go to the link below and put these options in.


K type

Transition Joint = Rugged Junction

SuperOmgea Clad XL

18" Sheath length

3/16" diameter

Grounded

Wire length = 40" or do the custom length and put your lead length in.

Overbraid option = Stainless

Termination = Stripped leads.

http://www.omega.com/config/probeconfig_TC.html
 
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Still haven't heard anything back which is surprising. Does it have to be all bent like that to install it? Usually its best to keep them strait as possible. Id give istrucon a couple more days to get back but basically it looks like any cheap K type would work. You can probably just not terminate the ends and strip an inch or so off and loop it around where the original style lugs mounted. Also Mic the diameter for sure.
 
white out said:
It doesn't have to be bent.
Yeah, that's what I was thinking about the terminals. Or putting some fittings on the ends from a hardware store.

I can wait a couple days. Car is down for another few weeks, so no big rush. If you don't hear back from them, I will probably just order from igotaneed4speed's link.
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Best to hold out as long as you can to see if Bean hears anything back as it would verify the type and material, if its not a K type and you put a K type in there the temp to voltage scale will be wrong and it will not read the correct temperature which could be bad news if the computer is using it as a tuning input or even just a safety.
 
Can't just put any old terminal fitting on the wires when you wire them. They work by using the dissimilar metals and introducing another metal will interfere with the temp reading. I've got hundreds of them in my lab, I'm sure someone here can hook you up with what you need. Looks like a 1/8" k type, the yellow and red wires dictate that, k type is common for exhaust measuring. Just need length of probe. We use 4 and 6", and also some 3/16" and 1/4" with varying lengths of leads both exposed and stainless braided sheathing.
 
So, since Lambo wanted to charge him 800 for one, is someone here gonna give him a killer deal and only charge 600 for one?
 
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