The Ultimate Thermometer Test

Here I checked five temperature measuring devices with melting snow.
The best is that is converts to slush by adding some tap water.

The values measured are:

1. Mercury thermometer -10-250oC : 0oC
2. Mercury thermometer -10-150oC : -0.5oC
3. Meat bimetal thermometer 0-100oC : -1oC
4. Type K thermocouple provided with an infrared thermometer:+1.8oC
5. Type K probe connected to a multimeter with type K readout: +0.9oC

So the deviatons are not negligible. I had to push the slush to keep contact with the five sensors.

EDIT: I tested a sixth one a type S thermocouple which measured -2oC but this thermocouple gives varying (+/- 2oC) results per 'session' (i.e power on wait a few minutes - measure - power off). The readout is a Sestos temperature controller for a Kanthal furnace.



[img src=thermotest2.jpg

[img src=thermotest2.jpg




[Edited on 2010-12-4 by metalresearcher]

Quote: Originally posted by metalresearcher

Here I checked five temperature measuring devices with melting snow. The best is that is converts to slush by adding some tap water.