Testo 174 H
If you like to do things yourself around the home, then maybe a moisture meter could be useful. No need to look for a power outlet, since it runs on batteries. Just get at it!
Conrad Electronic
testo 0572 6560 174H Multi-channel data logger Unit of measurement Humidity, Temperature -20 up to +70 °C 0 up to 100 RH
£88.31
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