Temperature measurement

Measurement of temperature is based on some properties that are temperature dependent.

Classification of thermometers

Direct

Volume expansion

• Mercury in glass thermometer
• Bimetallic strip
• Bourdon gauge type

Chemical thermometer

• Liquid crystal thermometer

Electrical thermometer

• Resistance thermometer
• Thermistor
• Thermocouple

Indirect

• Infrared ear and tympanic membrane thermometer

Measurement sites

9 common places:

• Rectal,
• Oesophageal,
• Tympanic membrane,
• Toe (??????),
• Bladder,
• Axilla,
• Nasopharynx,
• Central venous,
• Sublingual