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Home / Computer Hardware, Monitors & Peripherals / HC-SR501 RD-624 Human Body Infrared Induction Electronic Module Sensor PIR Probe Induction Switch

Attributes

Brand -
Category Electronic Components / Maker DIY / Computer Hardware, Monitors & Peripherals
Origin -
Input Voltage DC 5V to 20V
Detection Distance Up to 7 meters
Detection Angle 110 degrees cone angle
Output Signal 3.3V TTL high/low level
Delay Time 5 to 300 seconds (adjustable)
Block Time 2.5 seconds (default)
Trigger Mode L (unrepeatable) or H (repeatable)
PCB Dimensions 32mm x 24mm
Operating Temperature -15°C to 70°C
Package Content 1 x PIR Sensor Module

5 reviews

A

Anonymous

Apr 05, 2026

Rating: 5/5

Perfect for Arduino Projects

This sensor works flawlessly with my Arduino Uno. The detection range is accurate and the adjustable potentiometers make it easy to fine-tune sensitivity.

A

Anonymous

Apr 04, 2026

Rating: 5/5

Fast Shipping and Quality

Arrived quickly and was well packaged. The module feels sturdy and the soldering points are clear for easy wiring.

A

Anonymous

Mar 16, 2026

Rating: 5/5

Reliable Motion Detection

Using this for an automatic hallway light. It hasn't given me any false positives so far. Highly recommend for hobbyists.

A

Anonymous

Feb 17, 2026

Rating: 4/5

Good Sensor, Read Instructions

Works well once you understand the jumper settings for trigger modes. Make sure to check the pinout before connecting to avoid confusion.

A

Anonymous

Jan 25, 2026

Rating: 5/5

Great Value

Bought this for a DIY security light project. It triggers reliably when someone walks by. Very happy with the purchase.

5 FAQ

Q: How do I adjust the detection range?

A: There is a potentiometer labeled 'Distance' on the board. Turn it clockwise to increase range and counter-clockwise to decrease.

Q: Is this compatible with 3.3V logic boards like Raspberry Pi?

A: Yes, the output signal is 3.3V TTL, making it compatible with Raspberry Pi and similar boards.

Q: What is the maximum voltage input?

A: The module can accept DC input between 5V and 20V. We recommend 5V for most microcontroller projects.

Q: Can this module drive a relay directly?

A: No, the output current is low. You should use a transistor or a relay module to drive higher power loads.

Q: Does it work through glass?

A: PIR sensors generally cannot detect motion through glass as infrared radiation does not pass through it effectively.

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