The hotter the weather, the higher what?

The hotter the thermometer, the higher the temperature.

Description of thermometer:

Thermometer is an instrument for measuring temperature, which consists of a glass shell, a liquid column and a dial. According to the design and use of thermometers, they can be divided into many types, such as mercury thermometers, digital thermometers and infrared thermometers.

Type of thermometer:

1, mercury thermometer is the most common kind of thermometer, which measures the temperature by using the principle of mercury expanding with heat and contracting with cold. When the temperature changes, the volume of mercury will also change, which will cause the liquid column to rise and fall. This thermometer has the advantages of accurate measurement and low price, but it needs to be used safely because mercury is a toxic substance.

2. Digital thermometer is an electronic device, which uses sensors and electronic components to measure temperature. Electronic thermometer has the advantages of convenient reading, portability and accurate measurement, but its price is relatively high.

3. Infrared thermometer is a non-contact thermometer, which uses the thermal effect of infrared rays to measure the temperature. This thermometer is suitable for measuring the surface temperature of human body, animals, machines and other objects.

Precautions for using thermometer:

First, choose the right thermometer:

1. Selection according to range: When selecting a thermometer, it is necessary to select an appropriate thermometer according to the measured temperature range. For example, if you need to measure a person's temperature, you can choose a thermometer; If you need to measure the ambient temperature, you can choose a digital thermometer.

2, according to the use of scene selection: different thermometers are suitable for different scenes. For example, if you need to measure the temperature of the machine, you can choose an infrared thermometer; If you need to measure the temperature of food, you can choose a food thermometer.

Second, the preparation before use:

1, Check the integrity of the thermometer: Before using the thermometer, it is necessary to check whether the thermometer is intact, especially whether the mercury column of the mercury thermometer is broken.

2. Calibrate the thermometer: In order to ensure the accuracy of the thermometer, it is recommended to calibrate it before use. Thermometers can be calibrated according to known temperature values in standard temperature environment.

Three. Matters needing attention during use:

Correct placement of thermometer: When using thermometer, the thermometer should be placed horizontally, and the glass bubble should not leave the measured object. If you need to move the thermometer, you need to wait until the liquid column is stable before reading.