Wireless temperature sensor for hot water tank

Not sure if this is the right place to post about this, but here goes.

I've moved into a very old house which has a hot water tank heating system. There's currently no way of knowing the water temperature inside the tank, and I want to be able to visualise this data and potentially have a graph display showing temperature over time.

I have a Raspberry Pi that I'm using as a Pihole server and for smart heating control via ZigBee, and would like to use it for this project as well. Only problem is that the hot water tank is in a different room to the Pi, so I would need this solution to be wireless at point of transmission.

I was thinking that I could mount a thermocouple / temperature sensing probe to the hot water tank and then transmit the temperature data wirelessly to the Pi, but I haven't found anything online about what I'd need and how to go about doing it.

Any help is much appreciated!

Submitted by jackoboy9

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