There are many different types of testing instruments, common ones are thermometers, manometers, electronic scales, flow meters, gas detectors and infrared spectrometers.
1, thermometer
For measuring temperature, such as ordinary thermometers, infrared thermometers, thermocouples and so on.
2, manometer
Used to measure the pressure of gases or liquids, such as pressure gauges, differential pressure gauges.
3, electronic scales
Used to measure the mass or weight of the object, such as table scales, electronic scales, etc..
4, flowmeter
For measuring the flow of fluid, such as turbine flowmeter, electromagnetic flowmeter and so on.
5, gas detector
Used to measure harmful gases, microorganisms, PM2.5 and other pollutants in the air to ensure air quality.
6, infrared spectrometer
It is used to analyze and identify the molecular structure of the material instrument, the use of material and infrared radiation interaction, measure the material at different wavelengths of the absorbance and reflectance, in order to infer the structure of the material molecules.
Reference: Baidu Encyclopedia-Thermometer
Reference: Baidu Encyclopedia-Electronic Scale