Robus PIR Connect WiFi iP20 Smart Device Enabled Motion Sensor - RCPIR-01
£36.95 (inc. VAT)
Smart
Fire Angel Combined Strobe and Vibrating Pad - Smart RF* for wireless compatibility - FS1552W2-T
£102.25
£96.29
(inc. VAT)
PIR sensors use Infrared light to determine if a person is walking in front of the sensor. This will then trigger something to happen (typically a security light turning on).
A contact sensor has 2 components that are placed next to each other and, if the connection is broken, it sends a message to your security system hub.
A Vibration sensor measures changes in velocity (any movement) to trigger your security system.