The PIR sensor (Passive Infra-Red) is a pyroelectric sensor mainly consisting of an infra-red receiver and a focusing lens that bases its operation on the monitoring of the variations in the levels of reception of detected infra-reds, reflecting this movement by setting its output signal high. The 10μm spectrum corresponds to the radiation of heat from the majority of mammals as they emit temperatures around 36°C.
Sensor specifications (PIR)
Height: 22mm
Diameter: 20.2mm
Consumption: 170μA
Range of detection: 12m
Circuit Stability Time: 30seconds