The environmental conditions in which the infrared thermometer is located have a great impact on the measurement results, which should be considered and solved appropriately, otherwise it will affect the temperature measurement accuracy and even cause damage to the thermometer. When the ambient temperature is too high and dust, smoke and steam are present, accessories such as protective covers, water cooling, air cooling systems, and air purges provided by the manufacturer can be used. These accessories effectively address environmental impacts and protect the thermometer for accurate temperature measurement. When determining accessories, standardize services should be requested as much as possible to reduce installation costs. When smoke, dust or other particles reduce the measurement energy signal, a two-color thermometer is the best choice. Fiber optic two-color thermometer is the best choice under noise, electromagnetic fields, vibration or inaccessible environmental conditions, or other harsh conditions.

In sealed or hazardous material applications (such as containers or vacuum chambers), the thermometer observes through a window. The material must be strong enough and pass through the operating wavelength range of the thermometer used. Also determine whether the operator also needs to observe through the window, so choose the appropriate installation location and window material to avoid mutual influence. In low-temperature measurement applications, Ge or Si materials are usually used as windows, which are opaque to visible light, and the human eye cannot observe the target through the window. If the operator needs to pass through the window target, an optical material that transmits both infrared radiation and visible light should be used, such as ZnSe or BaF2, as the window material.