Long Detect Rang Fresnel Lens L8006WT for Automatic Light

PIR sensors are excellent in human and animal detection. They are mostly used in triggering an intruder alarm and activate household appliances upon the presence of a human.

No, alarm motion sensors do not work through glass. Most motion sensors use passive infrared (PIR) technology to detect motion. Changes in IR energy are not easily detected through glass. This is why motion sensors will generally not work through windows, which are usually insulated.

1. PIR sensor: Graphic Carton-> Carton

2. LDR: plastic bag -> Graphic Carton -> Carton

3. Fresnel Lens: plastic bag -> Carton

1. When there is dirt on the window, it will affect the detection performance.

2. When the ambient temperature and the human body temperature are close, the detection and sensitivity are significantly reduced, sometimes causing short-term failure. The recommended minimum temperature difference between the ambient temperature and the human body temperature needs to reach at least 4 ° C.

3. When designing the circuit, pay attention to anti-interference measures to prevent false alarms caused by radio frequency interference.