How to use home indoor thermometer

The use of outdoor thermometer:

(1) before use: see the range of the thermometer, determine whether it is suitable for the temperature of the object to be measured (i.e., to estimate the temperature of the object to be measured), to avoid damage to the thermometer; and recognize the divisional value of the thermometer and the zero scale line. In order to read accurately.

(2) use: a. thermometer glass bubble all immersed in the measured liquid (i.e., full contact with the object to be measured), do not touch the bottom of the container or the container wall;

b. thermometer glass bubble immersed in the measured liquid for a short while, to be stabilized by the thermometer's signals and then readings;

c. reading the thermometer's glass bubble to continue to stay in the measured liquid, and the line of sight with the liquid column in the thermometer. The line of sight is level with the upper surface of the liquid column in the thermometer.

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Extended information:

The earliest thermometers were developed in 1593 by the Italian scientist Galileo Galilei (1564-1642). His first thermometer was a glass tube with an open end and a walnut-sized glass bubble at the other end. To use it, the glass bubble was heated and then the glass tube was inserted into water.

As the temperature changed, the surface of the water in the glass tube moved up and down, and the amount of movement determined the change in temperature and the temperature. Thermometer has the role of thermal expansion and contraction so this thermometer, by the external atmospheric pressure and other environmental factors have a greater impact, so the measurement error is greater.

/baike.baidu.com/item/%E6%B8%A9%E5%BA%A6%E8%AE%A1/756585 "target="_blank "title="Baidu Encyclopedia - Thermometer">Baidu Encyclopedia - Thermometer Thermometer