What is a scientific instrument for measuring temperature?

Thermometer is a scientific instrument for measuring temperature.

In meteorology, thermometers are widely used to measure temperature. Temperature is one of the most important meteorological elements in meteorology, which is of great significance to weather forecast, climate analysis and meteorological service. Thermometers for measuring temperature are usually placed in special louver boxes to avoid the influence of environmental factors such as solar radiation and precipitation, so as to obtain more accurate temperature data.

Thermometers usually measure the temperature by using the characteristics of physical properties of substances changing with temperature. The working principle of the most common thermometer is to use the characteristic that the volume of liquid will change when the temperature changes. This kind of thermometer is called liquid thermometer.

With the development of science and technology, modern thermometers have been digitized and intelligent, and temperature data can be transmitted to weather stations or users in real time through sensors and data transmission systems. This greatly improves the accuracy and efficiency of temperature measurement, and also provides more abundant data support for meteorological services.

Classification of thermometers:

1. Classification by temperature range: Thermometers can be classified according to their temperature range, mainly divided into laboratory thermometers and household thermometers. The temperature measurement range of laboratory thermometer is usually -200℃ to 500℃, and the accuracy can reach 0.65438 0℃. However, the temperature measurement range of household thermometers is usually -40℃ to 50℃, and the accuracy is 0.5℃.

2. Classification by temperature measuring media: According to different temperature measuring media, thermometers can be divided into liquid thermometers and gas thermometers. Liquid thermometers mainly include mercury thermometers, alcohol thermometers and kerosene thermometers. They use the principle that liquids expand when heated and contract when cooled to measure the temperature. Gas thermometers mainly include thermopile thermometers and thermistor thermometers, which calculate the temperature by measuring the thermal movement of gas molecules.

3. Classification according to usage scenarios: According to different usage scenarios, thermometers can be divided into industrial thermometers, medical thermometers and environmental thermometers. Industrial thermometers are mainly used for temperature monitoring in industrial production, such as steel, chemical industry, electric power and other fields. Medical thermometers are mainly used to measure body temperature, and environmental thermometers are mainly used to measure environmental temperature, such as weather stations, agriculture, construction and other fields.

4. Classification by precision: Thermometers can be divided into ordinary precision thermometers and high-precision thermometers according to different precision. The temperature measurement error of ordinary precision thermometer is generally about 0.5℃, while the temperature measurement error of high precision thermometer can be controlled within 0.065438 0℃ or even less. High-precision thermometers are mainly used in scientific research, precision measurement and other fields.