What do you want to measure with your second one?
Is it the auto trans temperature you want to monitor? You can plumb a sensor into the sump or pipe to/from the cooler - means cutting into the car which I don't like. I've surface mounted a sensor with insulation on the pipe to the cooler immediately after the transmission. Is a good measure of the fluid temperature coming out of the trans.
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1996 D1 V8 - gone
2002 D2 Td5 ES- gone but still running elsewhere
2013 D4 SDV6 HSE - gone
2023 Defender 110SE D300
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