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Cylindrical angled plastic sensor body with M12 connector

Sick

Sick VTF18-3N5940 photoelectric proximity sensor NPN

SKU CH-HJ5E-2N8ZQ

Detects objects up to 45 mm using infrared light with a 10–30 V DC NPN output and IP67 housing

  • NPN dark switching gives reliable object detection
  • Infrared LED senses up to 45 mm range
  • 10–30 V DC supply fits standard controls
  • IP67 housing resists dust and water ingress
  • M12 4-pin connector enables quick installation

Sick VTF18-3N5940 Photoelectric Sensor

The Sick VTF18-3N5940 is a cylindrical photoelectric proximity sensor designed for industrial detection tasks. It operates on a 10 V DC to 30 V DC supply and provides an NPN dark-switching output for integration with PLCs or control systems. The infrared LED source delivers a sensing range up to 50 mm with potentiometer adjustment for precise setup.

M12 Connector Installation Notes

The sensor terminates in a male M12 4-pin connector that simplifies wiring in standard automation harnesses. Ensure the connector keyway aligns correctly before tightening to avoid pin damage. A common issue is reversing the supply polarity or exceeding the 30 V DC limit, which can damage the internal electronics. The IP67 rating protects against dust and temporary immersion when the connector is properly seated.

Pre-Order Compatibility Checks

Verify that your control system accepts an NPN dark-switching signal and can accommodate the 2 ms response time. Confirm the available mounting space suits the 75 mm cylindrical housing with angled light emission. The operating temperature span of –25 °C to +70 °C must match the application environment, and the supply must stay within 10 V DC to 30 V DC with ripple below 10 %.

Highlights

  • NPN dark switching gives reliable object detection
  • Infrared LED senses up to 45 mm range
  • 10–30 V DC supply fits standard controls
  • IP67 housing resists dust and water ingress
  • M12 4-pin connector enables quick installation

Specifications

BrandSICK
ModelSICK VTF18-3N5940

Questions about this item

How do I verify the sensor is operating correctly after wiring it to 10 V DC ... 30 V DC?

Check that the NPN output switches dark when an object enters the 0 mm ... 45 mm sensing range and the response time is 2 ms.

What comes in the box and what must I purchase separately?

The sensor housing with M12 4-pin male connector is included; a compatible M12 cable and 10 V DC ... 30 V DC power supply are not.

Which sensing-range version should I choose for detecting objects up to 45 mm away?

This model provides a 0 mm ... 45 mm sensing range and 0 mm ... 50 mm maximum; select it when your target distance falls within 45 mm.

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