Hall-Effect Sensor - US1881 (Latching)

Overview

The US1881 Hall-Effect Sensor (Latching) is a robust and reliable magnetic field sensor designed for precise presence and position detection. This latching Hall sensor changes its output state when a magnetic field is applied and maintains that state even after the magnet is removed, until an opposite magnetic field is applied. This makes it perfect for applications requiring a stable output, such as speed measurement, position sensing, and contactless switches. Whether you're building a robotics project, an industrial control system, or an automotive application, the US1881 delivers accuracy and dependability.

Key Features

• Latching Output: Maintains state until an opposite magnetic field is applied, ideal for counting and position tracking.
• High Sensitivity: Operates with a typical operating point of 30 Gauss and release point of -30 Gauss.
• Wide Voltage Range: Operates from 3.5V to 24V, compatible with both 3.3V and 5V systems.
• Open-Collector Output: Can be used to drive loads directly or interface with microcontrollers.
• Low Power Consumption: Ideal for battery-powered applications.
• Compact TO-92 Package: Easy to integrate into PCBs and breadboards.

Technical Specifications

• Type: Latching Hall-Effect Sensor
• Operating Voltage: 3.5V to 24V DC
• Output Type: Open Collector
• Operating Point (Bop): 30 Gauss (typical)
• Release Point (Brp): -30 Gauss (typical)
• Operating Temperature: -40°C to +150°C
• Package: TO-92 (through-hole)

Applications & Use Cases

• Speed Detection: Measure RPM in motors and wheels.
• Position Sensing: Determine the position of moving parts in industrial machinery.
• Brushless DC Motor Control: Provide rotor position feedback.
• Flow Meters: Detect rotation in fluid flow meters.
• Security Systems: Magnetic door and window sensors.
• Robotics: End-stop detection and precise movement control.

What's Included

• 1x US1881 Latching Hall-Effect Sensor

Compatibility

• Compatible with all major microcontrollers (Arduino, Raspberry Pi, ESP32, STM32, etc.).
• Works with 3.3V and 5V logic levels.
• Can be used with any standard magnet (e.g., neodymium).

MOKWN Recommendation

The US1881 is a fantastic choice for makers and engineers who need a reliable latching Hall sensor. Its wide voltage range and robust temperature tolerance make it suitable for both hobbyist projects and industrial applications. We recommend it for projects requiring precise speed or position feedback. For a complete setup, consider pairing it with a neodymium magnet and a pull-up resistor if needed.