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U18 Hall Effect Sensor — Unipolar Magnetic Sensor
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Rs.30.00
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U18 Hall Effect Sensor — Unipolar Magnetic Sensor
The U18 is a compact unipolar Hall Effect sensor designed for reliable magnetic field detection in embedded systems and industrial applications. It activates when a South magnetic pole is brought close and releases when the field is removed, making it ideal for non-contact switching, speed measurement, and position sensing with Arduino and other microcontrollers.
Technical Specifications
| Parameter | Value |
|---|---|
| Supply Voltage (Vcc) | 3.5V – 20V DC |
| Output Type | Digital Open-Collector (Active Low) |
| Operate Point (BOP) | ~80 Gauss (typical) |
| Release Point (BRP) | ~35 Gauss (typical) |
| Output Current (Sink) | 20 mA max |
| Operating Temperature | -40°C to +85°C |
| Package | SIP-3 (3-pin inline) |
| Sensing Type | Unipolar (South pole only) |
Pinout
| Pin | Name | Description |
|---|---|---|
| 1 | VCC | Supply Voltage (3.5V – 20V) |
| 2 | GND | Ground |
| 3 | OUT | Digital Output (Active Low, Open-Collector) |
Key Features
- Unipolar operation — responds to South magnetic pole only
- Wide supply voltage: 3.5V to 20V — compatible with 3.3V and 5V systems
- Open-collector output — requires 10kΩ pull-up resistor
- Compact SIP-3 package for easy PCB and breadboard integration
- Compatible with Arduino, ESP32, STM32, PIC, Raspberry Pi
Applications
- Non-contact speed and RPM measurement
- Position and proximity detection
- Brushless DC motor commutation
- Door/lid open-close sensing
- Industrial automation switching