My heat pump goes up to 55degC. The YF-G1 is specified for >80degC. So no problem. Anyone needing higher temperatures can take another flow meter. They all have pulse outputs. Any heating system (except solar thermal) with water temperatures over 60degC is so badly dimensioned that efficiency measur...

Has anyone made a heat meter that reports heat kWh to Domoticz? (Or MJ if you like) It would be great to measure the efficiency of a heat pump (or Dino fuel heater for those stuck in the 1900's ;) ) Water flow could be measured with a cheap YF-G1 flow meter on a pulse input, and two 18ds20 would mea...