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The HC-SR505 is a mini infrared PIR (passive infrared) motion sensor based on infrared technology, built to automatically control connected equipment with high sensitivity, high reliability, an ultra-small size, and ultra-low-voltage operation. It's specifically suited to auto-sensing applications in electrical equipment, and the listing highlights battery-powered automatic control products in particular as a key use case, which matches the sensor's genuinely tiny footprint and micropower design.
Its detection range is 3 meters, noticeably shorter than many standard PIR sensors designed for whole-room coverage, which makes it better suited to close-range presence detection, such as sensing whether a hand or object is near a specific spot, rather than covering an entire room from a single mounting point.
Quiescent current, meaning the current drawn while idle and not actively triggered, is rated under 50 microamps, an extremely low figure that makes the HC-SR505 well suited to battery-powered projects that need to sit dormant for long periods between activations. Operating voltage defaults to a wide 4.5V to 20V range, and average current consumption when active is 0.06mA.
Output level swings between 3.3V when high (triggered) and 0V when low, and the default trigger mode is repeatable, meaning the output stays high continuously as long as motion is detected, rather than pulsing once and resetting. Delay time defaults to 8 seconds (plus or minus 30 percent) after motion stops before the output goes low again, the induction angle covers a cone under 100 degrees, and the module measures just 10mm by 23mm by 5mm, weighing 10g, and operates from -20C to 80C.
3 meters.
10mm x 23mm x 5mm.
Under 50 microamps.
4.5V to 20V by default.
The default repeatable mode keeps the output high continuously as long as motion is detected, resetting after an 8-second delay once motion stops.
| Brand | Generic |
|---|---|
| Operating Voltage | 4.5-20V |
| Selling unit | PCS |
