measurement is made by means of a bimetal system inside
the thermometric sensor. The bimetal consists of two different
metal strips, permanently joined together. Both metal
features a thermal expansion coefficient that differs
from the other. This causes the strip to attain a particular
curve that is proportional to the temperature variation.
The actual bimetal system consists of a bimetal strip
that is either
Wound, as the size of the sensor and the temperature to
be measured demands. Any temperature variation influences
the bimetal in such a way as to rotate an attached spindle.
This rotation is indicated by means of a pointer on a
dial scale. WIKE bimetal thermometers are available to
measure temperatures from -70oC to +600oC
with an accuracy in compliance with Class 1 and 2 of DIN