Guys we have never heard about liquid crystals used in thermometer. The first question arises in your mind that what are liquid crystals? Liquid crystals is a matter in a state between solid and liquid having properties of both solids and liquids.
Now coming to my topic liquid crystal thermometer . It is a thin strip (somewhat like plastic strip) having different colour regions.Here thermochromic liquid crystals are used. Thermochromic is the property of substance to change its colour due to change in temperature. When this thermometer is kept before forehead liquid crystal emits light to indicate body temperature
The resolution of this liquid crystal sensors is 0.1°C . Also disposable liquid crystal thermometers have been developed for medical fields.