Temperature control with Crayons

Posted in Irreversible thermometers

Crayons are an alternative way to control temperature when there is a lack of space, or when temperatures rise above 290ºC where strips can't be used.

Test example of change

Temperature control with Crayons

Colour Change Crayon Behaviour

When applied to pre-heated surfaces, if colour change takes place:

(a) within 1-2 seconds, the temperature is within +/- 5ºC of its rating

(b) instantly, the temperature is higher than its rating

(c) after two seconds, the temperature is lower than its rating

Accuracy: +/-5ºC

 

REF INITIAL COLOUR COLOUR CHANGES AS BELLOW
120   120ºC/248ºF    
245   245ºC/473ºF 335ºC/635ºF 505ºC/941ºF
600   600ºC/1112ºF