I've got the cem dt 165 like Andy. I think this is very good as a humidity meter so long as it's not an issue that it's really quite large and only shows a reading when you poke it rather than all the time.
My other comment about the cem is that I've found the thermometer to be rubbish. The first one I had the temp indicated on it was very badly wrong the whole time, to such an extent that it was funny. I sent that one back and got a replacement and the thermometer with that is very wrong as well.
This helped me realise I don't need it to be a thermometer as I've got an infra red beam one and a couple of cheapo digi ones with probes and they cover what I need.
Maybe I was unlucky to get 2 CEM's that were both rubbish on the thermometer side of it.
Despite all that I think its worth having as a good humidity meter.
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