I'm using a [wired version] barbeque thermometer to measure oil temperatures on my vegetable-oil heating burner; goes up to around 200C / 400F.

Remote wireless versions of these devices are inexpensive, [aimed at a mass market]. Oregon Scientific's AW129, for instance, reads up to 392F at 100 feet range, about $28, on Amazon.

http://www.amazon.com/Oregon-Scientific-AW129-Wireless-Thermometer/dp/B0006G2WYK


I just lightly fix the 'meat' probe to the relevant pipe with a worm-drive stainless hose clip and cover it with a bit of regular split-foam pipe insulation.

The hot water from a wood-fired boiler will fluctuate during the stages of a burn far more than the accuracy of the thermometer. I guess you want this device as a refueliing indicator?

Alan

Last edited by Alan Belson; 01/21/09 07:31 PM. Reason: correction
Wood work but can't!