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Old 09-13-2021, 05:00 PM   #1
lutronjim
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Classic Instruments Temperature Sensor 12mm

Anybody have any info on this sensor?
https://shop.classicinstruments.com/sn12mm

Thanks
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Old 09-13-2021, 05:14 PM   #2
kglowacky
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Re: Classic Instruments Temperature Sensor 12mm

Yes. I am currently running one on my 2001 LS1. Its a direct fit and screws right in the rear of the pass side head. I am running it to factory gauges of my 78 C10 Silverado. Not sure if it is exact in temp readings but it will run at 1/2 gauge and at 3/4 gauge which is 207 (based on my PCM setup). The fans turn on and it cools down to 1/2 and the fans shut off. So for me it works fine as a indicator of I am in a safe running temp.
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Old 09-13-2021, 09:12 PM   #3
lutronjim
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Re: Classic Instruments Temperature Sensor 12mm

Do you happen to know if the 78 temp gauge has the same ohms range as 70?
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Old 09-13-2021, 09:35 PM   #4
kglowacky
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Re: Classic Instruments Temperature Sensor 12mm

I don't know. All I can tell you is the 3/4 position is around 207 temp. based on how my computer is set to turn on the fans
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Old 09-15-2021, 11:47 AM   #5
A1971Blazer
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Re: Classic Instruments Temperature Sensor 12mm

I think the Classic Instruments sender is calibrated for their gauge...not sure of the resistance range?
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Old 01-15-2023, 12:41 PM   #6
6600DURAMAX
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Re: Classic Instruments Temperature Sensor 12mm

This is the exact issues I'm running into as well

I have NVU gauges and I am looking for a temp gauge sensor that is M12 x 1.5 - while this gauge fits that spec will it read accurately with my NVU gauges ?

My other option is to use the M12 adaptor from ITC ( or others) but then the temp probe tip isn't truly in the water flow so how accurate will that be?

I cant be the only one trying to solve this ....
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Old 01-16-2023, 11:16 AM   #7
kglowacky
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Re: Classic Instruments Temperature Sensor 12mm

i am running one in my 78 with factory gauge and ecm from a 2002 camero. Works great . fans come on at 1/2 go off at 1/4 gauge . Dont know anymore details then that.

Last edited by kglowacky; 01-17-2023 at 03:26 AM.
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Old 01-16-2023, 05:46 PM   #8
6600DURAMAX
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Re: Classic Instruments Temperature Sensor 12mm

I called classic industries and they are not willing to give out the OHMs range for their sending unit ........... I find that very odd. How do they expect people to buy their part if they wont share the details of them ......

maybe its just me
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Old 01-17-2023, 08:31 AM   #9
Joyridin
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Re: Classic Instruments Temperature Sensor 12mm

I used one from Stewart Warner. Seemed to work fine. It took me 3-4 months to get it at the time, but that was during covid.
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Old 01-18-2023, 01:56 PM   #10
6600DURAMAX
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Re: Classic Instruments Temperature Sensor 12mm

I just ordered the adapter and will see what happens
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