Resistance Thermometer

• Resistance thermometer uses the fact that the electrical resistance of a metal (e.g platinum) wire increases with temperature.
• A resistance thermometer can measure temperatures accurately in the range -200 °C to 1 200 °C and is best for steady temperatures, but it is bulky.
• Thermometric substances can be solids, liquids (or) gases.
• Thermometric substances have physical properties that vary continuously and linearly with temperature, these properties are called thermometric properties.