41F Hall Effect Sensors TO-92 Arduino Magnetic Switch
10 Pack - ($0.5 ea)
$4.99 NZD
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$4.99 NZD
41F Hall Effect Sensors TO-92 Arduino Magnetic Switch
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Urban $40
Rural $60
The 41F-551 Hall Effect Sensor is a compact digital magnetic switch sensor in a TO-92 package designed for Arduino, ESP32, RPM sensing, wheel speed detection, magnetic proximity sensing, robotics, and automation projects.
- Digital Hall Effect magnetic switch output
- Compact TO-92 package
- Wide 3V – 24V operating voltage
- Fast switching response time
- Low power consumption
- Compatible with Arduino, ESP32 & Raspberry Pi
- Breadboard-friendly pin spacing
- Ideal for RPM & proximity sensing
Quick Wiring
1
Face the flat side toward you
The “41F 551” marked side should face toward you when identifying pins.
2
Connect VCC
Pin 1 → 3V–24V supply voltage.
3
Connect GND
Pin 2 → Ground.
4
Read digital output
Pin 3 → Digital input pin on your microcontroller.
Please note: The 41F-551 is a digital Hall switch sensor — output changes state when a magnetic field is detected.
Specifications
Model41F-551
Sensor TypeDigital Hall Effect Switch
PackageTO-92
Operating Voltage3V – 24V DC
Output TypeDigital Open Collector
Output StateLOW when magnet detected
Operating CurrentTypically 4mA
Response TimeFast switching response
Magnetic PolaritySouth Pole Trigger
Operating Temperature-40°C to +85°C
Lead Pitch1.27mm
Package Width4.1mm typical
Lead Length14mm+ typical
Please note: This sensor outputs a digital LOW signal when the correct magnetic pole is detected.
Getting Started
1
Insert into breadboard
The TO-92 package is breadboard compatible with standard 2.54mm spacing.
2
Connect power
Connect VCC and GND to your Arduino or ESP32.
3
Connect output pin
Connect OUT to a digital GPIO input.
4
Bring magnet close
The output switches LOW when the correct magnetic pole approaches the sensor.
Please note: Magnetic field strength, polarity, and distance affect switching performance.
Common Uses
Wheel RPM sensing
Motor speed detection
Door open/close detection
Magnetic proximity sensing
Arduino digital sensor projects
Robotics & automation systems
Please note: Hall sensors are commonly used as contactless switches for reliable long-life sensing.
Common Questions
Is this a digital or analog Hall sensor?
This is a digital Hall switch sensor with ON/OFF output behaviour.
Will this work with Arduino?
Yes. Connect the OUT pin to any digital GPIO pin and detect HIGH/LOW state changes.
What happens when a magnet is near?
The sensor output switches LOW when the correct magnetic pole approaches the sensor.
Does this work on a breadboard?
Yes. The TO-92 package is fully breadboard compatible.
Please note: Magnetic field strength, polarity, and distance affect switching performance.