Operating Ambient Conditions for Infrared Thermometers and Humidity Sensors
Ambient conditions where the thermometer is placed greatly affect measurement results and must be fully considered and properly addressed; otherwise, temperature measurement accuracy will be compromised, and equipment damage may even occur.In high-temperature environments with dust, smoke or vapor, accessories provided by the manufacturer such as protective sleeves, water cooling systems, air cooling systems and air purgers can be adopted. These accessories effectively eliminate environmental interference, protect the thermometer and ensure accurate temperature measurement. When selecting accessories, standardized services are recommended to reduce installation costs.
Under harsh conditions involving noise, electromagnetic fields, vibration or limited access, or when smoke, dust and other particles attenuate measurement signals, fiber-optic two-color thermometers and ratio pyrometers are the optimal solution. Light-based ratio thermometers are highly applicable to complex working environments with noise, electromagnetic interference, vibration and restricted access.
For sealed or hazardous material applications, such as containers and vacuum chambers, temperature measurement is conducted through an observation window. The window material must feature sufficient mechanical strength and high transmittance within the operating wavelength range of the thermometer. It is also necessary to confirm whether operators need direct visual observation through the window, so as to select a reasonable installation position and appropriate window materials to avoid mutual interference.
nly used as window materials. These materials block visible light and prevent naked-eye observation of the target. If operator visual inspection through the window is required, optical materials transparent to both infrared radiation and visible light shall be adopted, such as zinc selenide (ZnSe) and barium fluoride (BaF₂).
Ultrasonic thickness gauges, portable hardness testers, wear-resistant thermocouples, infrared thermometers, liquid level sensors, PT100 thermal resistors and humidity sensors.
When flammable gases exist in the working environment, intrinsically safe infrared thermometers shall be selected to realize safe temperature detection and monitoring in atmospheres with a specific concentration of flammable gases.
For severe and complex ambient conditions, a split-type system with a separate measuring probe and display unit is recommended for easy installation and configuration. Signal output types compatible with existing control equipment can be selected as required.
