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L1-01D.06 – Parts of a PIR

Fresnel Lens Focuses Thermal Energy on the PIR Sensor Sensor output electricity based on what it senses Amplifier boosts low amounts of electricity to usable level Comparator circuit decides when to trigger the sensor output Output is used to report to the alarm...

L1-01D.05 – How it Works

Simple PIRs look for a contrast between the background and the moving object. When the radiation change captured by the PIR exceeds a certain pre-set value (commonly a 3 degree change), the thermal sensor produces an electrical signal which is sent to a built-in...

L1-01D.03 – Passive Infrared (PIR)

Passive Infrared Sensors Are PASSIVE because they do not transmit a signal they sense the area They sense changes in infrared (radiated thermal energy) to detect motion Ceiling Mount Wall...