Does an Analog Temperature Sensor Ever Equal a Negative Number?

[ZebH]

Hi all,

I am wondering if an analog temperature sensor ever equals a negative number? Does any analog sensor ever equal a negative number?

Thanks,

Zeb

[Riva]

Not sure what you mean but the Analogue pin will not read negative voltages and you should avoid feeding any pins with negative voltages.

The analogue temperature sensor reporting temperatures lower than zero is possible because some of them have a zero degree output of > 0 volt. As an example the TMP35 can read in the range -40C to +150C and outputs 0.1V at -40C and 2V at 150C.

[ZebH]

Ah I see! Thanks very much for your help!

Zeb