Ambient Weather Wireless Thermo-Hygrometer with Two Remote Sensors

[NJxRinzler]

Or, you could just get a hand-held infrared thermometer for surface temperatures and call it a day.

One day! I just need to monitor humidity as well, two birds with one stone works best for me.

- - - Updated - - -

For the thermostat? What heat source is it controlling?

My under tank heater