Stovepipe Thermometer

The thermometer itself is circular, flat and is about two and a half inches across. It has a magnet on the back and you place it on the flue. There is also a little hole in the thermometer and a screw is provided. This is because if the heat reaches temperatures over 800 degrees such as during a chimney fire, the magnetic strength will decrease and the magnet may fall from the flue pipe and mark the floor. The idea is that you drill a hole in the pipe and attach the magnet using the screw provided. I must admit that we thought this wasn’t a good idea and it didn’t apply to us anyway – our fire is set on a hearth – so we just used the magnet to attach ours to the pipe.