This bimetal thermometers uses a bimetal which is
composed of two types of metal with different thermal
coefficients of expansion and they are wound into a
helical form, change according to temperature is
transmitted to the indicator, to indicate temperature.
• Few error due to ambient temperature exists when
compared with the liquid filled type.
• This thermometer is safe due to no charged liquid.
(no environment pollution)
• This thermometer is simple in construction and