Is it a thermocouple, resistance (PT-100, PT-1000, other) or some other kind of sensor?
It's a bit of a mystery at the moment.
I'm pretty sure it's not a thermocouple.
I'm pretty sure it's not a data type one like DS18B20
I think it's most likely a zener based one like LM335Z (but it is not LM335Z).
Resistive is quite possible too.
So if we share one temperature sensor output between two BMV-702, shall additional error be small, like less than 1 deg C?
dtaschler said: It is definitely an NTC Bead Thermistor. We found one that is close. Vishay PN NTCLE100E3154GB0. B-parameter of 4370K. It is remarkably close to the Victron original.
I have just verified this. I swapped out an actual BMV702 temp sensor...with this NTC thermistor...and was identical temperature.
Victron temperature sensor disambiguation table - which product supports which sensor
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