I have a tarm solo plus 40 and wanted to get a probe thermometer for the flue pipe exiting the boiler. The digital gauge on the front of the unit is not an accurate reading of the actual flue gas temperature with variations of approximately 100 degrees or more of a difference from what ive been told. I would like to get a probe therm that I could set in the flue and somehow run a wire to upstairs with a gauge on it that gives me the temp so I dont have to go downstairs all the time. Does anyone know of any products like this or am I just dreaming again.