The RE 200B is a passive infrared sensor designed to pick up heat radiation of wave lengths in a band around 10 microns. It contains two active elements con?gured as balanced differential series opposed type.
Features: Using pyroelectric PIR sensor, Fresnel Low-power, static power 50uA Wide voltage range, DC 4.5-20V Board small size 38 * 28mm (32 * 24 * mm) Repeatable / not repeatable trigger mode selection Easy to use, power + - signal output 7 m sensing range 110 ° angle sensor
HC-SR505 Mini PIR Motion Sensor is based on infrared technology and it can automatic control by itself with high sensitivity and high reliability. Because of the minimum size and low-power operation mode, it widely used in various of automatic electronic equipment, especially battery-powered automatic products.