Attributes

Brand	-
Category	Robotics / STEM Teaching Tools / Sensors
Origin	-
Model Number	E18-D80NK
Detection Type	Diffuse Reflection
Operating Voltage	5V - 24V DC
Output Type	NPN Open Collector
Detection Range	3cm - 80cm (Adjustable)
Response Time	< 2ms
Light Source	Infrared LED
Indicator	Green Power LED, Red Signal LED
Mounting Hole	M3 Screw Thread
Application	Robot Obstacle Avoidance, Line Tracking

6 reviews

Anonymous

Mar 21, 2026

Rating: 5/5

Works at 24V as advertised

Tested this with a 24V PLC input and it switched cleanly. The NPN output is exactly what I needed for my industrial control learning kit.

Anonymous

Mar 20, 2026

Rating: 5/5

Best budget sensor

Compared to other brands, this E18-D80NK offers the best stability in the sub-$5 range. No false triggers after proper adjustment.

Anonymous

Mar 20, 2026

Rating: 4/5

Good sensitivity, needs calibration

The module is very sensitive to ambient light initially, but once you tune the potentiometer in your specific environment, it works great for obstacle avoidance.

Anonymous

Mar 16, 2026

Rating: 4/5

Solid performance

Does exactly what it says. The infrared beam is invisible which is nice for aesthetic projects. Only minor issue is the wire length could be slightly longer.

Anonymous

Mar 13, 2026

Rating: 5/5

Perfect for my Arduino robot

This sensor works flawlessly with my 5V Arduino setup. The detection range is easily adjustable with the potentiometer on the back. Great value for the price.

Anonymous

Mar 05, 2026

Rating: 5/5

Reliable and compact

I bought five of these for a line-following car project. All of them performed consistently. The M3 mounting holes make installation very easy.

5 FAQ

Q: What is the maximum current this sensor can sink?

A: The NPN output can typically sink up to 100mA. However, for driving heavy loads like motors or relays, please use an external transistor or relay module.

Q: Is the output signal 3.3V compatible?

A: The module operates on 5V-24V. If you power it with 5V, the output high level will be near 5V. For 3.3V microcontrollers, we recommend using a voltage divider or a logic level converter on the signal line to be safe.

Q: Does sunlight interfere with the operation?

A: Strong direct sunlight can interfere with infrared sensors. It is recommended to use a shielding tube or operate the sensor in shaded conditions for outdoor applications.

Q: Can this sensor detect black objects effectively?

A: Yes, but the detection distance for black objects will be shorter than for white or reflective objects due to lower light reflection. You may need to adjust the sensitivity potentiometer closer to the object.

Q: How do I adjust the detection distance?

A: There is a blue multi-turn potentiometer on the back of the PCB. Turn it clockwise to increase sensitivity (distance) and counter-clockwise to decrease it. Use a small screwdriver for adjustment.

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