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E18-D80NK Adjustable Infrared Proximity Switch Photoelectric Detection Sensor With Wire

The E18-D80NK Adjustable Infrared Proximity Sensor Module can be adjusted to sense objects over a range of 3-80cm

This is an extremely easy to use sensor that consists of an IR transmitter and receiver pair in one module.  The IR transmitter emits IR light and the IR receiver detects the IR light that is reflected off objects.

The sensor was originally designed to automate the counting of objects moving along a production line, but it works equally well as an obstacle avoidance sensor on a robotic vehicle or any other applications where detection of objects or obstacles within its range is desired such as for a security system or monitoring a pet door.

Detection range is approximately 3-80cm.  The range is adjustable using a multi-turn screw on the back of the unit.  Turning the screw CW increases the range at which objects are detected.  Turning the screw CCW decreases the range.  If the adjustment is turned CCW too far, the module will no longer detect an object until it is turned CW again.  Similarly if it is turned CW all the way, it will always show a detection until it is turned CCW again.

The module can detect that presence of the object within the range it has been set for, but it cannot determine the distance to the object.

The signal output is normally held HIGH due to a built-in 10K pull-up resistor.  When an object is detected, the output drops to LOW as long as it is detected.  A red LED on the back of the module is lit when an object is detected.  The output is an open collector that can sink a max of 100mA.

The module operates at 5V.  Current draw is typically only 5mA though max current draw is rated as 25mA.

The body of the module is threaded and 2 knurled nuts are included which allow the sensor to be mounted in an 19mm hole.  The amount of protrusion through the hole is adjustable using the nuts.

We also have an acrylic bracket available below that can be used to mount the sensor which is handy for some applications such as robotic vehicles.


  • Extremely easy to setup and use
  • Fully adjustable detection range from 3 to 80cm
  • Simple logic and LED output indicates when object is detected
  • Built-in 45″ cable
  • 5V Operation
  • Optional mounting bracket available


Technical Specifications
Maximum Current Draw 25mA
Frequency 490Hz (measured)
Detection Range 3cm – 80cm
Detection Angle Approximately 15 degrees


Cable Pin-out
Brown Wire Connect to 5V
Blue Wire Connects to Ground
Black Wire Logic Output, active LOW


  • 1 x E18-D80NK Adjustable Infrared Proximity Sensor Module w/ attached 45″ cable

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