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tb/rb系列
model features
name ：bimetal thermometers
model no.：tb/rb series
model no.：tb/rb series
overview：
this bimetal thermometer uses a bimetal which is composed of two types of metal with different thermal coefficients of expansion. the two metals are wound into a helical form and changed according to the temperature, and the temperature will be indicated by the metal deformation.
feature：
few errors according to ambient temperature exists;
no filled liquid；
simple in construction and reasonably priced.
no filled liquid；
simple in construction and reasonably priced.