Compact and complete, easy to use Pyroelectric Infrared (PIR) Sensor Module for human body detection. Incorporating a Fresnel lens and motion detection circuit, suitable for a wide range of supply voltages and with low current drain. High sensitivity and low noise. Output is a standard TTL active low output signal indicated by on board LED.
The PIR (Passive Infra-Red)
Sensor is a pyroelectric device that detects motion by measuring changes in the
infrared levels emitted by surrounding objects. This motion can be detected by
checking for a high signal on a single I/O pin.
Module provides an optimised circuit that will detect motion up to 6 metres away and can be used in burglar alarms and access control systems.
The PIR sensor and Fresnel lens are fitted onto the the PCB. This enables the board to be mounted inside a case with the detecting lens protruding outwards, whilst still allowing easy access to the controls inside the case.