Hall Sensors Module 3144E 4pin Hall Switch Speed Count Sensor

3144E Hall Effect Speed Sensor Module — 4-Pin Digital Output

The 3144E module mounts a Hall effect switch sensor alongside a signal indicator LED on a compact PCB. When a magnetic field from a rotating magnet or magnetic disc passes the sensor face, the output pin switches from high to low (open-collector, active low), generating a pulse for every magnet that passes. Counting pulses over time gives rotational speed in RPM; counting total pulses gives angular position. The 3.3V–24V supply range covers both low-voltage MCUs and industrial 12V/24V signal lines.

• 3144E Hall effect switch — digital output, active low on field detection
• 3.3V–24V supply range — direct Arduino or industrial PLC input
• Open-collector output — pulls low on field, requires pull-up on signal line
• LED indicator — lights when magnetic field is detected
• 4-pin header — VCC, GND, signal, and LED control

How do you use the 3144E for RPM sensing?

Attach a small neodymium magnet to the rotating shaft or disc — one magnet per revolution. Connect the sensor output to an Arduino interrupt pin (with a 10k pull-up resistor) and count pulses in software. Dividing pulses-per-second by the number of magnets-per-revolution gives RPS; multiply by 60 for RPM.

Best for

Motor RPM measurement, bicycle speedometers, wind turbine rotation logging, fan speed control feedback, DC motor encoder replacement, gear tooth counting, and industrial speed monitoring.

Why Kunkune

Shipped from UK stock. 60-day returns, no minimum order. Fast Royal Mail delivery.

Buying in bulk? For orders of 10+ units, contact us for trade pricing.