Attributes

Brand	-
Category	Robotics / STEM Teaching Tools / Sensors
Origin	-
Operating Voltage	DC 4.5V - 20V
Detection Angle	< 120 degrees cone angle
Detection Distance	Up to 7 meters (adjustable)
Trigger Mode	L (Low) and H (High) selectable via jumper
Delay Time	5s to 300s (adjustable potentiometer)
Blockade Time	2.5s (default, adjustable)
PCB Dimensions	32mm x 24mm
Sensor Type	Pyroelectric Infrared (PIR)
Output Signal	3.3V TTL High / Low Level
Working Temperature	-20°C to +80°C

6 reviews

Anonymous

Mar 18, 2026

Rating: 4/5

Great for beginners

As someone new to electronics, this was easy to wire up. Just VCC, GND, and OUT. It reacted instantly to movement. I deducted one star only because the pins were slightly bent upon arrival, but I fixed them easily.

Anonymous

Mar 13, 2026

Rating: 5/5

Standard PIR, works as expected

If you need a standard HC-SR501, this is it. No surprises, just solid performance. The delay time potentiometer allows for precise control over how long the output stays high.

Anonymous

Mar 08, 2026

Rating: 5/5

Perfect for Arduino Projects

This sensor works flawlessly with my Arduino Uno. The sensitivity adjustment is very responsive, and I was able to detect motion across my living room easily. Great value for the price.

Anonymous

Mar 07, 2026

Rating: 5/5

Excellent build quality

The PCB looks clean and the soldering points are solid. I've been running this continuously for two weeks on a Raspberry Pi project without any false triggers or failures. Highly recommended.

Anonymous

Mar 04, 2026

Rating: 4/5

Good sensor, instructions could be better

The module itself is high quality and detects motion reliably. However, the diagram on the back is a bit small. Once I figured out the jumper settings for the trigger mode, it worked perfectly for my automatic light project.

Anonymous

Mar 02, 2026

Rating: 5/5

Reliable and Sensitive

I bought five of these for a home security prototype. All of them functioned immediately out of the box. The detection range is impressive, easily hitting the 6-7 meter mark in optimal conditions.

5 FAQ

Q: Does this come with a lens cover?

A: Yes, the module comes with a white, dome-shaped Fresnel lens already installed. This lens focuses the infrared radiation onto the sensor element.

Q: What is the difference between H and L trigger modes?

A: In 'H' (High) mode, the sensor keeps the output high as long as motion is detected continuously. In 'L' (Low) mode, the sensor outputs a single high pulse for the set delay time regardless of continued motion during that period.

Q: Can I adjust the detection distance?

A: Yes, there is a potentiometer labeled 'Distance' on the board. Turning it clockwise generally increases the sensitivity and detection range, while counter-clockwise decreases it.

Q: Can this sensor work directly with a 5V Arduino?

A: Yes, the HC-SR501 operates between 4.5V and 20V, so it is fully compatible with 5V Arduino boards. The output signal is 3.3V TTL, which is safe for Arduino input pins.

Q: Is this suitable for outdoor use?

A: The module itself is not waterproof. For outdoor use, you must house it in a waterproof enclosure. Also, ensure the lens is protected from direct rain and extreme temperature fluctuations.

Explore your interests

STC32G12K128 STC8H8K64U Microcontroller Small System Core Board Development Board Emulator

$16.50

Youxin Electronics_STM32H743IIT6 Core Board System Board Learning Board STM32 Development Board

$118.00

Arduino DUE Development Board 32-bit ARM Controller A000062 Italian Official Original Import with Cable

$299.00

Ultrasonic Sensor HC-SR04 Ultrasonic Distance Measuring Module Bracket US015-025-026-100

$3.16

Serial SHT20 Chip Temperature and Humidity Sensor Test, SHT30 Chip Measurement and Monitoring Module by Viter Intelligence

$11.00

High-Speed Yabo Smart Raspberry Pi 4B Motherboard Development Board Accessories RaspberryPi 2G/4G/8G RAM Py

$494.30

Magnetic Circular Counting Chips, Two-Sided Flip Coins for Elementary Math, Kindergarten Early Education, Ten-Frame Matrix, Addition/Subtraction within 10 & 20, Teaching Tools

$11.90

3-Wire/4-Wire Flame Sensor Module, Fire Source Detection with IR Receiver, Flame Detection and Alarm

$1.08

SANSI White Label Class A Glass Graduated Cylinder C18 Micro-Precision Demulsification Cylinder with Scale Measurement Includes Certificate Ground Joint Stopper Hexagonal Bottom Borosilicate Glass Lab Equipment

$3.68

EV2400 Battery Unlock Fuel Gauge Programmer MSP430 HPA500 Evaluation Module Interface Board SMBus

$323.00

Cube Three-View Teaching Aid with Grid - 3D Geometry Observation Tool for Grades 4-5 Math (2cm Cubic Blocks Set)

$15.10

OrangePi Orange Pi Zero3 Zero 3 Development Board Allwinner H618 Orange Pi

$228.00

Digital 38KHz Infrared Receiver Transmitter Head Sensor Module Electronic Building Blocks Robot Infrared Communication Remote Control

$2.29

12V Stable Version Light-Control Switch No-Light Sensing with Extension Cable Photoresistor Plus Relay Module

$49.20

STM32 Smart Car 51 Microcontroller Arduino Obstacle Avoidance Chassis Kit Mecanum Wheel Robot Car

$40.80

Tech Small Production Small Invention DIY Piano Electronic Keyboard Real Playable Science Small Handmade DIY Materials

$33.00

HX711 Pressure Sensor Module Electronic Scale Bracket Weighing DIY Scale Pan Tray Set 5/10/40kg200

$3.28

Transparent 3D Geometric Model Perspective Decomposition Graphic Teaching Aid, Complete Set for Elementary Grades 1-6 Math

$6.80

Thin Film Pressure Sensor Display, USB Rechargeable Flexible Resistive Pressure Digital Display Module, Wide Range Wireless

$20.00

E18-D80NK Infrared Photoelectric Switch Diffuse Reflection Obstacle Avoidance Sensor Module 3-80CM

$12.60

LAN8720 Module Network Module Ethernet Transceiver RMII Interface Development Board Xinwei Electronics

$7.85

STC15W408AS Core Board Minimum System Board 51 Microcontroller Development Board TTSOP20 Learning Board

$18.47

New Version MEGA2560 R3 Development Board, Improved MEGA2560 R3 with Sensor Expansion Board

$13.68

Gradient Visual Illusion Kit: Electric Rotating Assembly Toy for Maker DIY, Paintable Handmade Model

$8.72

51/AVR Microcontroller Core Development Board STC89C52RC/51MCU Experiment Board/ATMEGA32 Learning Board

$37.90

[Trial Pack] Xianlang Complete Cat Treat Sticks Meal Packs Main Course Cans Freeze-Dried Cat Food Sample Snacks Gift Set

$15.00

5A Range Current Transformer Module Voltage Sensor Single-Phase AC Active Output Current Transmitter

$5.06

Foldable Clothes Drying Rack Floor Standing Home Balcony Bedroom Hanging Clothes Quilt Drying Artifact Outdoor Cooling Rod Indoor Drying Rack

$47.10

Metal Detector Module Non-Contact Metal Induction Sensor Detection Module Metal Detector

$8.70

RV1103 Miniature Linux Development Board: RISC-V Vision and AI with Ethernet Port

$53.10

For Arduino Development Board R3 Mainboard Microcontroller Module Kit Programming Learning Board Sensor Suite

$78.00

Xuefen Geometry Stamping and Tracing Set for Grades 1-2, 3D and 2D Ink Pads, Math Learning Tools, Cube and Cuboid Models

$4.51

Rubber Tire Toy 4WD Smart Car Wheels Car Model Robot Accessories (Suitable for 2mm Axle)

$0.50

AHT10 High-Precision Digital Temperature and Humidity Sensor Measurement Module I2C Communication Replaces sht20

$7.88

Digital 38KHz Infrared Receiver/Transmitter Head Sensor Module for Electronic Building Blocks Robots, Infrared Communication Remote Control

$2.80

51 MCU Minimum System STC89C52 DIP40 Through-Hole Smart Car Main Control Board Learning Experiment

$19.80

Outdoor Adventure Kids' Insect Observation Box with Magnifying Glass, Boys & Girls Toy for Exploration, Butterfly Catching and Fish Scooping Tools

$7.80

MPU-9255 9-Axis Attitude 3-Axis Electronic Compass Accelerometer Gyroscope Magnetic Field Sensor Module

$13.42

Freeze-Dried Chicken Treats for Dogs: Nutritious Weight-Gain Breast Meat Chunks for Puppies – Teeth Cleaning, Grain Mixing, Universal Use

$3.90

Ningbo Keli SQB Cantilever Beam Weighing Module Sensor 100kg 500kg 1t 2t 3 Ton Small Floor Scale Inductor

$48.00