E18-D50NK Adjustable Infrared Photoelectric Sensor NPN NO 3–50cm

E18-D50NK Adjustable Infrared Photoelectric Sensor NPN NO 3–50cm
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  • Product Code:SQ1079
  • Availability: 1000
  • $1.15
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  • Ex Tax:$1.15
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Tags: E18-D50NK, photoelectric sensor, infrared obstacle sensor, NPN NO sensor, adjustable proximity switch, M18 sensor, Arduino IR sensor, 3-50cm sensor, diffuse reflection sensor, robot avoidance sensor

The E18-D50NK is an adjustable diffuse-reflection infrared photoelectric sensor designed for non-contact object detection in robotics, automation, and industrial counting applications. The sensor integrates an infrared emitter and receiver in a single M18-threaded cylindrical housing. When an object enters the detection field, the infrared light reflected from its surface triggers the receiver, and the sensor outputs a digital switching signal. The NPN NO (Normally Open) output configuration means the signal line remains high (or floating, depending on the load wiring) when no object is detected and switches to an active low state when an obstacle is present within the set range.

The detection range is adjustable from 3 cm to 50 cm via a potentiometer on the rear of the sensor body. This adjustability allows the user to tune the trigger distance for different targets and mounting arrangements. The sensor responds in less than 2 ms, making it suitable for fast-moving production lines and real-time obstacle avoidance on mobile robots. The detection angle is less than 15 degrees, giving the sensor a focused forward field of view.

The E18-D50NK operates from a 5V DC supply (the most consistently cited voltage across retail and academic sources), with an output drive current of 100mA. The M18 threaded barrel, approximately 17mm in diameter and 70–77mm in length, allows the sensor to be mounted through a panel or bracket using the two included plastic nuts. The sensor is widely used in robot obstacle avoidance, production line piece counting, machine speed measurement, visitor counting, label presence detection, security systems, limit switching, and automatic stop functions.

E18-D50NK photoelectric sensor Application

  1. Robot obstacle avoidance and collision prevention
  2. Production line piece counting and object detection
  3. Machine rotation speed and cycle counting
  4. Visitor or people counting at doorways and passages
  5. Label and sticker presence detection on bottles and packages
  6. Anti-theft and security system triggers
  7. Automatic kitchen and appliance control
  8. Limit switch and automatic stop functions

E18-D50NK photoelectric sensor Specifications

  1. Product Model: E18-D50NK
  2. Sensor Type: Diffuse-reflection infrared photoelectric sensor
  3. Output Type: NPN NO (Normally Open)
  4. Detection Range: 3 cm to 50 cm (adjustable via potentiometer)
  5. Supply Voltage: 5V DC (most consistent; some listings cite 6–36V DC)
  6. Output Current: 100 mA
  7. Response Time: < 2 ms
  8. Detection Angle: < 15°
  9. Operating Temperature: -25°C to +55°C (some sources: -40°C to +70°C)
  10. Housing Type: M18 threaded cylindrical barrel
  11. Barrel Diameter: ~17 mm
  12. Barrel Length: ~70–77 mm
  13. Cable Length: ~1.0–1.2 m
  14. Mounting Accessories: 2 × plastic nuts

Features

  1. Adjustable 3–50 cm detection range via onboard potentiometer
  2. Diffuse-reflection infrared sensing — no separate reflector required
  3. NPN NO (Normally Open) digital output compatible with Arduino and microcontrollers
  4. Fast response time of less than 2 ms
  5. Narrow detection angle of less than 15° for focused sensing
  6. M18 threaded cylindrical housing for panel or bracket mounting
  7. 5V DC operation with 100 mA output drive
  8. 1.0–1.2 m cable length for flexible installation
  9. Two plastic mounting nuts included
  10. Suitable for both transparent and opaque objects
  11. Wide application coverage: obstacle avoidance, counting, security, and automation
  12. Compact and cost-effective solution for non-contact detection
Electrical Parameters
Voltage DC 5V
Current 100mA

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