Guidance on determining the wavelength range of infrared thermometers
The emissivity and surface properties of the infrared thermometer's target material determine the thermometer's spectral response, or wavelength. For high reflectivity alloy materials, there is low or varying emissivity. In high-temperature areas, the best wavelength for measuring metallic materials is near-infrared, and 0.18-1.0μm wavelength can be used. Other temperature zones are available with 1.6μm, 2.2μm and 3.9μm wavelengths.
Infrared thermometer Because some materials are transparent at certain wavelengths, infrared energy will penetrate these materials, so a special wavelength should be selected for this material. For example, when measuring the internal temperature of glass, use 10μm, 2.2μm and 3.9μm wavelengths (the glass to be measured must be very thick, otherwise it will be transmitted through); when measuring the internal temperature of glass, use 5.0μm wavelength; when measuring low temperatures, it is appropriate to use 8-14μm wavelength; and for example The wavelength of 3.43μm is used to measure polyethylene plastic film, and the wavelength of 4.3μm or 7.9μm is used for polyester. If the thickness exceeds 0.4mm, the wavelength of 8-14μm is selected; for example, the narrowband 4.24-4.3μm wavelength is used to measure C02 in the flame, the narrowband 4.64μm wavelength is used to measure C0 in the flame, and the 4.47μm wavelength is used to measure N02 in the flame.
The working principle of the infrared thermometer is very simple. It uses infrared technology to quickly and easily measure the surface temperature of objects. Quickly obtain temperature readings without mechanical contact with the object being measured. Just aim, press the trigger and read the temperature data on the LCD display. Infrared thermometers are lightweight, small, easy to use, and can reliably measure hot, dangerous, or hard-to-reach objects without contaminating or damaging the object being measured. Infrared thermometers can take several readings per second, while contact thermometers take several minutes per second. It receives invisible infrared energy emitted by a variety of objects themselves. Infrared radiation is part of the electromagnetic spectrum, including wireless microwaves, ultraviolet, radio waves, visible light, R-rays and X-rays. Infrared rays are located between visible light and radio waves. The wavelength of infrared rays is commonly expressed in microns, and the wavelength range is 0.7 microns-1000 microns. In fact, the 0.7 micron-14 micron band is used in infrared thermometers. It is recommended to use Guangzhou Hongcheng CEM infrared thermometer series products, which can measure temperatures between -50 and 2200 degrees. The measurement is accurate and easy to operate.
