PIR Micro Motion Detection Sensor AM312 - circuitrockstemplate--26571827773729__main

// description

Detect Nearby Objects Without Contact

The PIR Micro Motion Detection Sensor AM312 is a proximity presence sensor module with digital output designed for presence sensing, short-range detection, and touchless automation. It is a practical fit for makers, students, and engineers who want reliable sensor data in embedded builds.

Key details include Sensing range: 3 meters, ≤100 degree cone angle; Working voltage: DC 2.7-12V; Interface: Digital GPIO.

Why you’ll love it

  • Useful spec: <0.1mA
  • Sensing range: 3 meters, ≤100 degree cone angle
  • Power range: DC 2.7-12V
  • Compact size: Approx. 12mm x 25 mm 
  • Easy wiring: Digital GPIO
  • Maker-friendly build: Easy to use in prototypes, classroom projects, and custom electronics

Compare with similar products

Product Sensor style Standout
PIR Micro Motion Detection Sensor AM312 proximity presence sensor module with digital output Current item
Motion PIR Sensor Gravity proximity presence sensor module with digital output infrared sensing
PIR Motion Sensor Module Digital HC-SR501 proximity presence sensor module with digital output digital output
PIR Motion Sensor HC SR505 proximity presence sensor module digital output, infrared sensing

What you can build

This sensor is a good fit for touchless dispensers, object counters, door triggers, small robots, and presence alarms.

Starter bundles

Pair it with an Arduino-compatible board, ESP32, or Raspberry Pi, plus a breadboard and jumper wires for quick setup and testing.

Recommended add-ons

Useful add-ons include a microcontroller board, jumper wires, and pull-up or pull-down support when needed, depending on how you plan to power, mount, and log the sensor.

Technical specifications

Product PIR Micro Motion Detection Sensor AM312
Static power consumption <0.1mA
Sensing range 3 meters, ≤100 degree cone angle
Working voltage DC 2.7-12V
Total size Approx. 12mm x 25 mm 
PCB Dimensions 10mm x 8mm
Trigger can be repeated
Delay time 2 seconds
Module Lens Small lens
Interface Digital GPIO

Wiring & usage notes

Connect power and ground, then wire the output pin to a digital GPIO input. Check whether the module uses active-high or active-low logic in your code.

What’s in the box

1 × PIR Micro Motion Detection Sensor AM312

Frequently Asked Questions

What does the PIR Micro Motion Detection Sensor AM312 measure? It is designed to measure nearby objects, remote IR signals, or motion.
Can I use it with Arduino, ESP32, or Raspberry Pi? Yes. It is well suited for common maker and embedded platforms, as long as you power it at the correct voltage and match the signal level to your controller.
How do I connect this Digital GPIO sensor? This sensor provides a digital switching-style signal that is easy to read from a GPIO pin.
Does it need calibration? Yes. Chemical and gas sensors usually need warm-up time, calibration, and periodic checking if you want stable readings.
Is it good for prototyping? Yes. It is a practical choice for learning, proof-of-concept builds, and small automation projects.