Overview
Senba is the specilist Fresnel lens manufacturer in China. We can offer the high quality products with best price. Our factory located in Henan, a central city of China, the cost will be more competitive, so that the price is extremely good.
The fresnel lens is a optical element, one side is smooth, another side is by a ring a part of concentric garden composition. Fresnel lens arrays designed for Passive Infrared Sensor. The optical surface increases lens sensitivity for PIR sensor application. All the PIR sensor must work with the Fresnel Lens.
Wave soldering is likely to cause degradation of product performance. Wave soldering is not recommended. Generally we recommend to solder by hand.
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.