HC-SR501 PIR Human Motion Infrared Sensor
HC-SR501 PIR infrared sensor works on 4.5–20V DC with adjustable trigger delay. It detects human motion for automatic lighting, alarm and Arduino smart home applications.
Description
- Operating Voltage: DC 4.5V ~ 20V
- Quiescent Current: less than 50μA
- Trigger Mode: Re-triggerable / Non-retriggerable (default: repeat trigger)
- Adjustable Delay Time: 0.xxs ~ tens of seconds (factory preset 5~18s)
- Blocking Time: default 2.5s, adjustable from 0.xxs to tens of seconds
- Detect Angle: within 100° cone
- Lens Diameter: 23mm
- Board Size: 32mm × 24mm
Features & Application
This PIR module identifies human movement reliably. It controls lamps, buzzers, automatic doors and home appliances automatically. Widely used in security alarm, human-sensing toys, smart lighting and industrial automation for home, mall, warehouse and corridor.
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