Grade 7 | Science | Temperature measuring instrument - Thermometer, Heat, Olympiad, CBSE, ICSE, SOF, ITO
Types of thermometer
Usually, there are two types of thermometers used by us.
1. Laboratory thermometer
2. Clinical thermometer
Laboratory thermometer- It is generally available in the range of -10°C to 110°C. This type of thermometer is used in the laboratory for the measurement of the temperature of various chemicals.
Clinical thermometer- It is used for the measurement of body temperature. The range of this thermometer is between 35°C to 42°C. Such thermometer has graduated scale, where either the scale is in degree Celsius or in Fahrenheit. Human body temperature on the Fahrenheit scale is 98 4°F while on the Celsius scale it is 37°C. Generally, a clinical thermometer is a glass tube filled with a liquid like mercury or alcohol. As the temperature rises for a body, the mercury expands. The divisions on the body of the thermometer help us to measure the increase in temperature of the body( for which temperature change is to be measured).
Digital thermometer- such thermometers directly shows the temperature on a digital display. This needs a battery to function contrary to the analog thermometer.