Description
Reviews
| Brand | - |
| Category | Robotics / STEM Teaching Tools / Sensors |
| Origin | - |
| Model Number | A3144 |
| Operating Voltage | 4.5V - 24V DC |
| Output Type | Digital Switch (Open Collector) |
| Compatibility | Arduino, Raspberry Pi, 51 MCU |
| Sensing Range | Up to 25mm (depending on magnet strength) |
| Response Time | < 4 µs |
| Operating Temperature | -40°C to +85°C |
| Pin Configuration | 3-Pin (VCC, GND, OUT) |
| PCB Dimensions | 18mm x 12mm x 3mm |
| Package Includes | 1x A3144 Sensor Module, 1x Magnet |
Anonymous
Mar 26, 2026
Rating: 4/5
Works as expected
Simple plug-and-play experience. Connected VCC to 5V, GND to ground, and the output to a digital pin. The LED on the board lights up when a magnet is detected, which is a nice visual indicator for debugging. Would buy again.
Anonymous
Mar 20, 2026
Rating: 5/5
Great for learning electronics
I am using this with a Raspberry Pi 4 for a university project. The documentation online is plentiful, and this specific module matched all the tutorials perfectly. It detects the magnetic field instantly when I bring the magnet close.
Anonymous
Mar 15, 2026
Rating: 5/5
Excellent sensitivity
The A3144 chip on this module is genuine and performs according to the datasheet. I tested the switching threshold, and it is very accurate. Great component for industrial prototyping or hobbyist projects alike.
Anonymous
Mar 11, 2026
Rating: 5/5
Perfect for my Arduino speedometer project
This sensor works flawlessly with my Arduino Uno. I used it to count wheel rotations for a DIY bicycle speedometer. The response time is incredibly fast, and the included magnet is strong enough to trigger it reliably from a few centimeters away. Highly recommended for beginners.
Anonymous
Mar 03, 2026
Rating: 4/5
Good value, easy to integrate
Bought five of these for a line-following robot that detects magnetic tape. They are very consistent. The only reason for 4 stars instead of 5 is that the soldering pads are a bit small, so you need a steady hand if you aren't using header pins.
Anonymous
Mar 02, 2026
Rating: 5/5
Reliable and robust
I've been running this sensor in an outdoor enclosure for two weeks now to monitor a gate opening. Despite some temperature fluctuations, it hasn't missed a beat. The build quality feels solid for the price point.
Q: Does the package include the magnet shown in the pictures?
A: Yes, each order includes one small cylindrical magnet specifically paired with the sensor module for immediate testing and integration.
Q: What is the maximum distance the magnet can be from the sensor to trigger it?
A: The detection distance depends heavily on the strength of the magnet used. With the included small magnet, reliable triggering usually occurs within 10mm to 15mm. Stronger neodymium magnets can increase this range up to 25mm.
Q: Is the output analog or digital?
A: This is a digital switch module. The output pin goes LOW when a magnetic south pole is detected near the front of the sensor and stays HIGH otherwise. It does not provide an analog voltage proportional to the field strength.
Q: Does this module work with 3.3V logic levels like the Raspberry Pi GPIO?
A: Yes, the module operates between 4.5V and 24V for power, but the output is open-collector. You can use it with 3.3V systems like Raspberry Pi by powering the module at 5V and using a pull-up resistor to 3.3V on the output line, or simply rely on the internal pull-ups if your configuration supports it safely.
Q: Can I use this to measure RPM of a motor?
A: Absolutely. By attaching a small magnet to the rotating shaft and placing this sensor nearby, you can count the pulses per minute to calculate RPM. This is a very common application for the A3144 sensor.
Jiuzheng Tongming Submerged Solenoid Pulse Valve TMF-Y-25/40/50/62/76S, Dust Removal Pulse Blowing Valve
$150.00
Large Water Bucket Stand – Storage Rack for Office Purified Water Dispensers and Mineral Water Containers
$282.56
Double Loop Chain Lifting Sling, Manganese Steel Double-End Ring Hoisting Chain, G80 Manganese Steel Lifting Rigging 1/2/3/5T
$98.00
Hesdige JG-376 Portable Stone Removal Hook - Multi-Function Tool for Cleaning Gravel from Car Tire Treads
$16.91
Used 90% Condition Removed Car Tires 165 175 185 195 205 215 225 235/50 55 60 65 R13 14 15 16 17
$68.00
Blower Assembly AC Motor Fan for Changan CS75, Raeton CC, Oshan A800, and CS35 - Original Equipment
$427.73
Professional Sketch Blending Knife - Gray Tone Sponge Blender for Details and Highlights - Art Exam Tool
$2.90
Yuanzhi Water Bucket Rack 3/4/5 Tier Single Row with Board V-Shaped Water/Paper Cup Pure Mineral Water Bucket Storage Stand
$143.00
Rubber Wheel Chock 460x180x160 Anti-Slip Triangular Wedge
$354.33
Household Small Range Hood Portable USB Desktop Smoke Extractor for Living Room Hot Pot BBQ Odor Removal Mini Fume Extractor
$39.00
Household Water Dispenser Stand - Multi-Tier Floor Rack for Bottled Pure Water and Mineral Water in Offices
$129.74
WYPALL* Microfiber Cleaning Cloths Yellow 83610, 6 Sheets/Pack * 4 Packs/Case
$132.76
Ceramic Ink Dish, Water Dish, Brush Rest, Ice-Crack Ink Box, Multi-Function Brush Washer, Ink Stone, Brush Holder, and Kung Fu Tea Cup
$1.90
Car Tire Stone Removal Hook, Foldable and Extendable Tool for Extracting Pebbles from Treads
$2.07
Touchscreen Waterproof Phone Pouch for Swimming and Rafting, Sealed Bag for Beach, Sand, Snorkeling, and Underwater Photography
$5.53
Chunfei Grocery Store Yunan GR02 Gravel Bike, Thru-Axle, Mechanical Disc Brakes, Lightweight Touring Setup with Multiple Rack Mounts
$6,441.00
Electric Guitar Tutorial for Beginners - 7-Week Self-Study Plan with Exercises, Corrections, and Materials
$219.00
Professional Bathtub-Style Brush Washing Set - Cute 3-Piece Watercolor and Chinese Painting Brush Cleaner with Palette
$11.80
![[Sold Out & Discontinued - Display Only] Radish Defense ABO20.0 Spring Tour Series Blind Box Figure](https://www.gosteppe.com/cache/small/product/269201/legacy-main-5af4651a8d30dc42d9412600.png)
[Sold Out & Discontinued - Display Only] Radish Defense ABO20.0 Spring Tour Series Blind Box Figure
$16.90
Ebru Marbling Plastic Tool Kit – Needles, 3-Prong Combs, Cones, Straws, and Droppers for Peacock Patterns
$1.28
CANDLE.LAB | Silicone Border Mat for DIY Scented Candles and Soap Making Tray Mold
$32.00
Shiji Runde Coal Shed Mine Dust Removal Explosion-Proof Anti-Freezing Fog Cannon Port Dust Suppression 80m Ultra-Fine Industrial Fog Machine
$4,180.00
Mobile Retractable Spray Booth for Furniture - Foldable Track-Mounted Painting Room
$6,240.00
Long Handle Bristle Paint Brush - Hog Hair Brush for Oil Painting, Acrylic Wall Art, and Children's Drawing
$1.80
Electrostatic Powder Coating Equipment and Electronic Powder Dispenser Supply
$17,250.00
DIY Toast-Shaped Silicone Mold for Handmade Soap - Square Soap Making Mold
$105.00
Kindergarten Sponge Stamp Set – Mushroom-Head Circular Printing Tools for Kids' DIY Art and Painting Kits
$3.50
Heavy-Duty Lifting Chain Set – Manganese Steel Chains with Hooks, Rings, and Hoist Accessories
$198.00
Car Tire Stone Removal Tool, Multi-Function Groove Hook for Portable Tire Picking and Cleaning
$11.50
m Dogs Strap Auto Retractable Dual Dog Leash With
$199.92
![[Trial Pack] Xianlang Complete Cat Treat Sticks Meal Packs Main Course Cans Freeze-Dried Cat Food Sample Snacks Gift Set](https://www.gosteppe.com/cache/medium/product/208273/legacy-main-9ec245ebf781f65a434ba854.webp)
