What factors influence the accuracy of infrared temperature sensors?

The accuracy of infrared temperature sensors is influenced by several factors, including emissivity, the material's surface properties, distance-to-spot ratio, and ambient temperature. Emissivity refers to how well a surface emits infrared radiation, which can vary between materials. The sensor's distance from the target also affects its ability to focus on a small area. Additionally, environmental factors like humidity, dust, or other gases can interfere with infrared readings. Calibration and the sensor's wavelength also play important roles in ensuring precise measurements from infrared temperature sensors.