T bangos ilgis diapazonas ir atsakas laikas dviejų spalvų termometras
Į bangos ilgis diapazonas dviejų spalvų infraraudonųjų spindulių termometras
The emissivity and surface properties of the target material determine the spectral response or wavelength of the pyrometer. For high reflectivity alloy materials, there is low or varying emissivity. In the high temperature area, the best wavelength for measuring metal materials is near infrared, and the wavelength of {{0}}.18-1.{{20}}μm can be selected. Other temperature zones can choose 1.6μm, 2.2μm and 3.9μm wavelength. Since some materials are transparent at a certain wavelength, infrared energy will penetrate these materials, and a special wavelength should be selected for this material. For example, the wavelengths of 10 μm, 2.2 μm and 3.9 μm are used to measure the internal temperature of the glass (the glass to be tested must be very thick, otherwise it will pass through) wavelengths; The wavelength of 3.43 μm is used for measuring polyethylene plastic film, and the wavelength of 4.3 μm or 7.9 μm is used for polyester. If the thickness exceeds 0.4mm, the wavelength of 8-14μm is used; for example, the narrow-band 4.24-4.3μm wavelength is used to measure C02 in the flame, the narrow-band 4.64μm wavelength is used to measure the C0 in the flame, and the 4.47μm wavelength is used to measure the N02 in the flame.
Response time of two-color infrared thermometer
The response time indicates the reaction speed of the infrared thermometer to the measured temperature change, which is defined as the time required to reach 95 percent of the final reading (the two-color colorimetric optical fiber only needs 5 percent of the energy). It is related to the photodetector and signal processing circuit. It is related to the time constant of the display system. The response time of the new infrared thermometer can reach 1ms. This is much faster than the contact temperature measurement method. If the moving speed of the target is very fast or when measuring a fast-heating target, a fast-response infrared thermometer should be selected, otherwise the sufficient signal response will not be achieved, and the measurement accuracy will be reduced. However, not all applications require a fast-response infrared thermometer. For static or target thermal processes where thermal inertia exists, the response time of the pyrometer can be relaxed. Therefore, the choice of the response time of the infrared thermometer should be adapted to the situation of the measured target.
