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Permalink Reply by Brad Cook on April 27, 2013 at 3:02pm That depends on what you are measuring. When I am measuring the temperature of the air in a house or outside, I also measure the relative humidity (RH), which will take several minutes to stabilize with a digital Temp/RH meter. If I am measuring the temperature rise across the heat exchanger of a furnace, I use a digital Accurite food thermometer. In a moving air stream they react fairly quickly. I use the same thermometer for measuring the temperature of the hot water at the tap, and it reacts quite quickly with liquids.
Permalink Reply by Ryan Moore on April 29, 2013 at 5:26am That's good to know. I am usually looking for a quick read on ambient air temperature. I eventually purchased a Testo 605-H2 Humidity Stick, which works fairly well but still takes a few minutes to stabilize. It does well in a moving air stream and has a nice feature of a built-in shield in case I can't get a hole around a bend from the heat exchanger. I haven't tried it on a liquid, and I'm actually not sure it's built for that. I'll have to check the manual.
Permalink Reply by David Meiland on April 29, 2013 at 7:51am Most of the temp/RH meters come to a reading more quickly if you wave them around in the air a bit.
I don't think the Testo is intended for liquids, but I could be wrong...
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