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Cylindrical metal sensor with M12 connector, 78 mm long

Sick

Sick VTF18-3E5240 Photoelectric Proximity Sensor NPN

SKU CH-N00R-2N6QX

A cylindrical photoelectric proximity sensor with NPN output, 10–30 V DC supply, and a 0–45 mm sensing range in an IP67 brass housing

  • Detects objects up to 45 mm with infrared LED
  • Adjustable sensing distance via built-in potentiometer
  • Switches in 2 ms for fast response
  • IP67 metal housing resists dust and water
  • Operates on 10 V DC to 30 V DC supply

Compact cylindrical sensor

The Sick VTF18-3E5240 is a photoelectric proximity sensor with an NPN switching output. Its metal housing measures 78 mm in length and carries an IP67 enclosure rating. The unit operates on 10 V DC to 30 V DC and connects via a male M12 four-pin connector. It suits automation engineers who need reliable object detection in tight machine spaces.

Upgrade from basic limit switches

This sensor replaces mechanical limit switches that wear out or fail in dirty environments. The infrared LED and potentiometer adjustment give a sensing range up to 50 mm without physical contact. The jump is worth it when maintenance intervals must be extended and false triggers from vibration are unacceptable.

Stable output under continuous duty

Power consumption stays at 30 mA with ripple limited to 10 percent across the full voltage span. Response time is held at 2 ms from –25 °C to +70 °C, so repeated cycles do not drift. The brass nickel-plated barrel and PMMA optics resist coolant splash and thermal cycling alike.

How it compares

Measured against everything we stock in Electrical Trade Tools & Kits, at today’s prices. Recalculated every night.

Price $72.99
Cheaper than about 67% of the 5,006 comparable items (median $95.99).

Specifications

Product
Brand nameSICK
Model nameSICK VTF18-3E5240

Questions about this item

What diameter cut-out does the 78 mm cylindrical sensor need for mounting?

The sensor has a cylindrical housing 78 mm long with an M12 thread; drill a 12 mm clearance hole and secure with the supplied lock-nut.

How do I wire the 4-pin M12 connector to a 10–30 V DC supply without reversing the NPN output?

Connect pin 1 to +10–30 V DC, pin 3 to 0 V, and pin 4 to the load; the NPN output pulls the load to 0 V when the infrared beam detects an object within 45 mm.

When should I clean the PMMA optics or replace the sensor given the IP67 rating and –25 °C to +70 °C range?

Wipe the plastic lens whenever dust or oil blocks the infrared spot; replace the unit if the potentiometer can no longer hold a stable 45 mm sensing distance after cleaning.

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