Introduction to infrared thermometer: The principle of temperature measurement of infrared thermometer is to convert the radiant energy of infrared rays emitted by an object into an electrical signal. The size of infrared radiant energy corresponds to the temperature of the object itself. According to the size of the electrical signal, the temperature of the object can be determined. Thermometer principle The infrared thermometer consists of an optical system, a photodetector, a signal amplifier, signal processing, and display output. The optical system converges the target infrared radiation energy within its field of view. The size of the field of view is determined by the optical components of the thermometer and their position. The infrared energy is focused on the photodetector and converted into a corresponding electrical signal. The signal passes through the amplifier and the signal processing circuit, and is converted to the temperature value of the measured object after being corrected according to the algorithm of the internal treatment of the instrument and the target emissivity. In nature, all objects with temperatures above absolute zero are constantly emitting infrared radiation energy to the surrounding space. The magnitude of the infrared radiation energy of an object and its distribution by wavelength - is very closely related to its surface temperature. Therefore, by measuring the infrared energy radiated by the object itself, it can accurately measure its surface temperature, which is the objective basis on which infrared radiation is measured. Infrared Thermometer Principle The black body is an idealized radiator that absorbs the radiant energy of all wavelengths. Without the reflection and transmission of energy, the surface emissivity is 1. However, the actual objects existing in nature are hardly black. In order to clarify and obtain the law of infrared radiation distribution, it is necessary to select a suitable model in theoretical research. This is the quantized vibrator model of body cavity radiation proposed by Planck. The law of Planck blackbody radiation, the blackbody spectral irradiance expressed in wavelength, is derived. This is the starting point of all infrared radiation theory, so it is called the blackbody radiation law. The amount of radiation of all actual objects depends on the wavelength of the radiation and the temperature of the object, as well as the type of material that makes up the object, the method of preparation, the thermal process, and the surface state and environmental conditions. Therefore, in order to apply the law of blackbody radiation to all practical objects, it is necessary to introduce a proportionality factor, ie, emissivity, related to the material properties and surface state. This coefficient indicates how close the thermal radiation of the actual object is to the blackbody radiation, with values ​​between zero and less than one. According to the law of radiation, as long as the emissivity of the material is known, the infrared radiation characteristics of any object are known. The main factors affecting the emissivity are: material type, surface roughness, physical and chemical structure and material thickness. When using the infrared radiation thermometer to measure the temperature of the target, first measure the amount of infrared radiation in the range of the target, and then calculate the temperature of the target by the thermometer. The monochromatic thermometer is proportional to the amount of radiation in the band; the two-color thermometer is proportional to the ratio of the amount of radiation in the two bands. Pay attention when using To locate a hot spot, to find a hot spot, the instrument aims at the target, and then scans the target up and down until the hot spot is determined. Temperature measurement is not possible through glass. Glass has very special reflection and transmission characteristics and does not allow accurate infrared temperature readings. However, the temperature can be measured by the infrared window. Infrared thermometers are best not used for temperature measurement (stainless steel, aluminum, etc.) on shiny or polished metal surfaces. Only the surface temperature is measured, and the infrared thermometer cannot measure the internal temperature. Pay attention to environmental conditions: steam, dust, smoke, etc. It blocks the optical system of the instrument and affects accurate temperature measurement. Ambient temperature, if the thermometer is suddenly exposed to an ambient temperature difference of 20 ° C or higher, allowing the instrument to adjust to the new ambient temperature within 20 minutes. 1. To avoid damage to the infrared thermometer, first use compressed air to remove large particles and dust, then wipe with a cloth. 2. Gently use a slightly moistened non-corrosive solution to clean the lens or a mildly diluted soap solution (solution or a mildly diluted soap solution (do not use a soft cotton cloth to wipe the lens (do not immerse the cloth in liquid) Wipe the lens with a soft cotton cloth (do not immerse the cloth in the liquid). Wipe the display gently with a clean computer monitor cleaning cloth. 3. Gently wipe the display with a clean computer monitor cleaning cloth. 4. Gently wipe the thermometer body with a clean, slightly damp cloth. If necessary, soak the cloth with a solution of water and a small amount of mild soap. 5. When the use is completed, please cover the lens cover with the infrared thermometer as soon as possible and put it in the carrying case for storage. Folding performance indicators, such as temperature range, spot size, working wavelength, measurement accuracy, response time, etc.; environmental and working conditions, such as ambient temperature, window, display and output, protection accessories, etc.; other options, such as easy to use, Maintenance and calibration performance and price also have a certain impact on the choice of thermometer. With the technology and continuous development, the best design and new development of infrared thermometers provide users with various functions and multi-purpose instruments, expanding the choice Beijing Heng Aode Instrument Co., Ltd. is mainly engaged in liquid nitrogen therapy instrument, electric water level gauge, empty box pressure gauge, austenitic gas analyzer, quadruple automatic jet extractor, soot flue gas analyzer, portable flue gas analyzer , metal powder fluidity tester, dirt thermal resistance tester, digital atmospheric pressure gauge, stainless steel automatic solution filter, ultraviolet radiation meter, hydrogen generator, dew point sensor, infrared oil detector, pollution index SDI analyzer, melamine Speed ​​measuring instrument, powder comprehensive characteristic tester powder characteristic tester radioactivity detector, explosion-proof electrostatic meter / electrostatic tester / wet gas flowmeter gas flowmeter flowmeter mercury bromide test paper. 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October 19, 2022