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Cylindrical M18 photoelectric sensor with M12 connector, plastic PBT/PC housing, 75 mm length, IP67 rating

Sick

Sick VS/VE18-4N3840 Through-beam photoelectric sensor NPN

SKU CH-727D-8D8G8

Through-beam photoelectric sensor with 20 m maximum range, NPN output and M12 connector

  • Detects objects up to 20 m away with through-beam infrared sensing
  • NPN output handles 100 mA load for direct PLC connection
  • M12 4-pin connector enables quick wiring in control cabinets
  • IP67 housing resists dust and water jets in harsh environments
  • Operates from –25 °C to +70 °C for outdoor or cold-store use

Sick VS/VE18-4N3840 Through-beam Sensor

This Sick VS/VE18-4N3840 is a through-beam photoelectric sensor with an NPN switching output. It suits industrial automation tasks that require reliable object detection over distances up to 20 metres. The cylindrical M18 housing fits standard mounting points and carries an IP67 enclosure rating for harsh environments. Electricians and maintenance engineers use it for presence checks on conveyors and packaging lines.

Upgrade from Diffuse or Retro-reflective Sensors

Through-beam operation separates the sender and receiver, giving a longer sensing range and higher resistance to dust or glossy surfaces than diffuse or retro-reflective types. The jump is worthwhile when the application demands detection up to 14 metres with a consistent light spot of 700 mm diameter. Infrared LED emission and a 2.8° dispersion angle provide stable switching at 250 Hz. Selectable light or dark switching via the L/D control cable adapts the logic to the process.

Check Voltage, Connector

Verify that the control system supplies 10 V DC to 30 V DC with ripple below 10 % and can sink up to 100 mA from the NPN output. The sensor connects through a male M12 4-pin plug, so the mating cable or junction box must match that pinout. Confirm the operating temperature window of –25 °C to +70 °C covers the installation site. The plastic PBT/PC housing and 75 mm length determine the mechanical clearance needed.

Highlights

  • Detects objects up to 20 m away with through-beam infrared sensing
  • NPN output handles 100 mA load for direct PLC connection
  • M12 4-pin connector enables quick wiring in control cabinets
  • IP67 housing resists dust and water jets in harsh environments
  • Operates from –25 °C to +70 °C for outdoor or cold-store use

Specifications

BrandSICK
ModelSICK VS/VE18-4N3840

Questions about this item

What is the thread diameter and housing length needed to mount the VS/VE18-4N3840 sensor?

The sensor has an M18 x 1 thread diameter and a 75 mm housing length for cylindrical mounting.

How is the light/dark switching mode selected on the VS/VE18-4N3840 during installation?

The switching mode is selectable via the L/D control cable; connect it to choose light or dark switching.

What enclosure rating and temperature range apply for long-term use of the VS/VE18-4N3840?

The sensor is rated IP67 and operates from –25 °C to +70 °C for reliable performance in harsh conditions.

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