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Small split IR break-beam sensor pair with 5mm LEDs

Goldendisk

Goldendisk IR Break Beam Sensor 5mm LED Counting Module Split Through-Beam Photoelectric Switch

SKU CH-ZW3P-G2EFK

Infrared break-beam module with 5 mm LEDs detects objects passing through the beam, outputs NPN normally-open signal in 2 ms, runs on 3–5 V DC, and connects to Arduino, 51.

  • High sensitivity ensures fast, stable response
  • 2 ms response time enables precise motion detection
  • DC 3–5 V power suits Arduino and microcontroller projects
  • NPN normally open output works with relay, PLC, 51, K60, STM32
  • Split through-beam design gives accurate counting and timing

IR Break-Beam Sensor Module

The Goldendisk IR Break Beam Sensor is a through-beam photoelectric switch that uses a 5 mm infrared emitter and receiver pair to detect objects crossing the beam. It delivers high sensitivity with a 2 ms response time, making it faster than passive infrared sensors for precise motion detection. The module operates from a 3–5 V DC supply and provides an NPN normally-open output suitable for direct connection to microcontroller inputs.

Ideal for Arduino and PLC projects

Hobbyists and engineers building robotics, speed measurement or timing systems can wire this sensor to Arduino, 51-series, STM32 or K60 controllers as well as to PLCs and relays. The fast NPN output simplifies code for event counting or position sensing. Buyers who need a reflective or diffuse sensor instead of a through-beam arrangement should look at a different sensing principle.

2 ms NPN normally-open output

The decisive specification is the 2 ms response time combined with an NPN normally-open output stage powered from 3–5 V DC. This timing and logic level determine whether the module can keep up with the moving parts in your design and whether it interfaces cleanly with your chosen controller. Verify that your application tolerates this response window and voltage range before purchasing.

How it compares

Measured against everything we stock in Sensors, Transducers & Thermometers, at today’s prices. Recalculated every night.

Price $23.99
Cheaper than about 68% of the 255 comparable items (median $39.99).

Specifications

No published specifications for this item yet.

Questions about this item

Which version should I choose for a 5 V Arduino project?

The module operates from DC 3 to 5 V and provides an NPN normally-open output, making it directly compatible with a 5 V Arduino digital input when the internal pull-up is enabled.

What does the 2 ms response time mean for motion detection?

The sensor switches state within 2 ms of the beam being interrupted, so it can reliably detect objects moving fast enough to cross the gap in a few milliseconds.

What interface does the NPN output use and what voltage level does it produce?

The output is an open-collector NPN transistor that pulls the signal line to ground when the beam is broken; the high level is whatever voltage the external pull-up resistor is connected to, up to the supply rail.

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