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Detect Nearby Objects Without Contact
The Reed Switch Module is a magnetic sensor with digital output designed for obstacle detection, touchless triggers, object counting, and simple automation. It is a practical fit for makers, students, and engineers who want reliable sensor data in embedded builds.
Key details include Operating Voltage: 3.3V to 5V DC; Output format: Digital switching output ( 0 and 1 ); PCB Size: 32mm x 14mm.
Why you’ll love it
- Controller output: Digital switching output ( 0 and 1 )
- Power range: 3.3V to 5V DC
- Compact size: 32mm x 14mm
- Maker-friendly build: Easy to use in prototypes, classroom projects, and custom electronics
- Common controller support: Works well with Arduino, ESP32, Raspberry Pi, and similar boards
- Project-ready sensing: obstacle detection, touchless triggers, object counting, and simple automation
Compare with similar products
| Product | Sensor style | Standout |
|---|---|---|
| Reed Switch Module | magnetic sensor with digital output | Current item |
| Magnetic contact switch door sensor | button or switch input module | general-purpose sensing |
| Float Switch Plastic Water Level Control | liquid level sensor | general-purpose sensing |
| Crash Sensor Right | vibration sensor | general-purpose sensing |
What you can build
This sensor is a good fit for robot obstacle avoidance, touchless dispensers, automatic doors, object counters, parking aids, and level 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 | Reed Switch Module |
|---|---|
| Output format | Digital switching output ( 0 and 1 ) |
| Operating Voltage | 3.3V to 5V DC |
| PCB Size | 32mm x 14mm |
| Think of any switch as a bridge | when it’s open, current can’t flow; when closed, current flows freely. Reed switches behave the same, but they are activated magnetically instead of physically. |
| Category | proximity presence sensors |
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 × Reed Switch Module
Frequently Asked Questions
What does the Reed Switch Module measure?
It is designed to measure magnetic field or magnetic presence.
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.
What affects accuracy?
Power quality, wiring, mounting, target material, and the real environment can all affect the reading. It is best to test and calibrate in the final setup.
Is it good for prototyping?
Yes. It is a practical choice for learning, proof-of-concept builds, and small automation projects.
Manila stock. Order before 16:00 PHT, ships today via J&T or LBC. Provincial: 1–3 working days.
Schools / class POs: we accept Purchase Orders for accredited schools and universities. contact us with your PO details.
Returns: 7-day inspection window for DOA units. Email proof of issue and we ship a replacement.
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