There are many factors that affect the normal use of China photoelectric sensor, the first is the detected medium. The effect of different media on the sensor is mainly due to the difference in its reflectivity (light transmittance). Since different media have different materials, the reflectivity is also different. The greater the difference in the reflectivity (transmittance) of the medium, the higher the recognition rate of the China photoelectric sensor for different media under the same conditions, and the better the adaptability. Therefore, for media with different reflectivity (light transmittance), different photoelectric sensor or with different circuit parameters should be selected.The same medium has great differences in the reflectivity of light of different wavelengths, so the wavelength of the light source detected by the sensor should also be considered. There is also the influence of detection distance. The China photoelectric sensor have a certain detection distance. Outside the detection distance range, the sensitivity of the sensor is greatly reduced, or even can not work properly. If the distance of the detection medium changes frequently and exceeds the detection range of the photoelectric sensor, it will also cause its sensitivity to drop sharply, resulting in misjudgment.The environment is also an important factor. The influence of the environment on the China photoelectric sensor is mainly due to factors such as infrared light and dust in nature. The types of sensors that are often used today are mainly diffuse, which are sensitive to dust and light conditions in the environment. Therefore, when using the China photoelectric sensor, the influence of environmental factors should be fully considered, and the direct exposure of light and the shielding of dust should be avoided.