Attributes

Brand	-
Category	Robotics / STEM Teaching Tools / Sensors
Origin	-
Operating Voltage	3.3V - 5V DC
Output Signal	TTL Level (High/Low)
Detection Type	Through-Beam Infrared
Response Time	< 10 microseconds
Slot Width	5mm ± 0.5mm
LED Wavelength	940nm Infrared
Mounting Style	PCB Screw Terminal / Pin Header
Operating Temperature	-20°C to +70°C
Compatible Applications	Smart Cars, Motor Encoders, Speed Counters
Package Includes	1x Sensor Module, 1x Mounting Kit

6 reviews

Anonymous

Mar 31, 2026

Rating: 5/5

Perfect for my Arduino robot car

This sensor works flawlessly with my Arduino Uno. The response time is incredibly fast, allowing for precise speed measurement on my DIY smart car project. Setup was easy with the provided pins.

Anonymous

Mar 22, 2026

Rating: 5/5

Great for tachometer projects

Used this to build a digital tachometer for a small DC motor. The infrared beam cuts cleanly, and the output logic levels are perfect for direct connection to microcontrollers without extra conditioning.

Anonymous

Mar 22, 2026

Rating: 4/5

Good value, stable signal

I used this to build a motor encoder counter. The signal is very stable and doesn't jitter much even at high RPMs. Just make sure your power supply is clean to avoid noise.

Anonymous

Mar 22, 2026

Rating: 5/5

Reliable and compact

The form factor is small enough to fit into tight spaces on my custom chassis. The through-beam design is much more reliable than reflective sensors in varying light conditions.

Anonymous

Mar 14, 2026

Rating: 5/5

Essential component for velocity control

Bought two of these for a differential drive robot. They provide accurate pulse counts which helped me implement a solid PID controller. Highly recommended for students.

Anonymous

Mar 04, 2026

Rating: 4/5

Works as described

No complaints here. It detects the interrupter disk accurately. The only minor issue is that the mounting holes are a bit tight for standard M2 screws, but it works with some patience.

5 FAQ

Q: Can this sensor be directly connected to a Raspberry Pi GPIO?

A: Yes, since the output is TTL level and operates at 3.3V-5V, it can be directly connected to Raspberry Pi GPIO pins. Ensure you connect the VCC to the 3.3V or 5V pin depending on your Pi model requirements.

Q: How do I calculate speed using the pulses from this sensor?

A: Count the number of pulses over a fixed time interval. Speed = (Pulse Count / Number of Slots on Disk) / Time Interval. Multiply by the wheel circumference to get linear speed.

Q: What is the maximum RPM this sensor can accurately measure?

A: With a response time of under 10 microseconds, this sensor can handle very high frequencies. For a standard 10-slot encoder disk, it can accurately measure speeds exceeding 10,000 RPM.

Q: Is this sensor suitable for outdoor use?

A: While the operating temperature range is wide, the open optical slot can be affected by direct sunlight or dust. For outdoor use, we recommend adding a simple shield or housing to protect the beam path.

Q: Does this module come with the interrupter disk or just the sensor?

A: The package includes the sensor module and a mounting kit. The interrupter disk (codewheel) is not included and must be sourced separately or 3D printed according to your specific resolution needs.

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