Answer: PIR is a far-release infrared sensor, which is based on the human body’s far-release infrared to determine whether it is active. There are other objects in nature that have the same wavelength of infrared, such as sunlight, mammals, cars, and heat sources. Serious electromagnetic interference can also cause false triggers to the equipment. The interference of the PIR sensor can be reduced by the following means.
a. Try to avoid direct sunlight, solar cameras, and other outdoor products. Radar technology has been added, therefore, there isno need to avoid direct sunlight.
b. Where there are more people, it is recommended to turn off the PlR or turn down the sensitivity to reduce false alarms.