1.Not recommended for outdoor use. Rain can trigger it by mistake.
2.They become less responsive to objects moving at constant speed.
3.No vibration in the mounting position.
4.Require power supply ripple less than 100mv
5.The range and angle of the sensor will be affected by the surrounding environment o
6.Microwaves have a penetrating effect, but not through reinforced concrete walls or metal objects o Single core wire is recommended for terminal.