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Cylindrical M18 photoelectric sensor, grey PBT housing, M12 connector, potentiometer adjustment

Sick

Sick VTF18-3P5740 photoelectric proximity sensor PNP

SKU CH-HX80-KQ79G

Photoelectric proximity sensor with background blanking detects objects up to 45 mm using infrared light and a focused 3 mm spot at 25 mm distance

  • Detects objects up to 45 mm with focused infrared LED
  • Background blanking ignores reflections beyond the set sensing range
  • PNP dark-switching output handles 100 mA loads at 250 Hz
  • IP67-rated PBT/PC housing withstands –25 °C to +70 °C
  • M12 4-pin connector simplifies wiring on 10–30 V DC supply

Sick VTF18-3P5740 photoelectric sensor

The Sick VTF18-3P5740 is a cylindrical photoelectric proximity sensor with background blanking for industrial detection tasks. It operates on 10 V DC to 30 V DC and provides a PNP dark-switching output suitable for automation systems. The sensing range reaches 45 mm with a maximum of 50 mm using focused infrared optics.

Installing the M18 threaded sensor

The M18 x 1 thread allows direct mounting into a matching hole and the 78 mm housing length fits standard brackets. A 4-pin M12 male connector simplifies wiring without soldering. Sensing range is adjusted by a 270° potentiometer; incorrect setting can reduce the effective range below 45 mm. The IP67 enclosure resists water and dust but the plastic PBT/PC housing can crack under heavy mechanical impact.

Limits of the 10–30 V DC PNP interface

The sensor draws up to 30 mA and the switching output is limited to 100 mA, so it cannot drive high-power loads directly. Switching frequency is 250 Hz with a 2 ms response time, which restricts use on very fast production lines. Operating temperature spans –25 °C to +70 °C; outside this range the sensor may malfunction. The focused spot is Ø 3 mm at 25 mm distance, limiting detection of very small objects at longer ranges.

How it compares

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Price $81.99
Cheaper than about 59% of the 5,006 comparable items (median $95.99).

Specifications

Product
Brand nameSICK
Model nameSICK VTF18-3P5740

Questions about this item

How can I confirm the VTF18-3P5740 sensor is detecting correctly after wiring it to a 24 V DC supply?

The PNP dark-switching output goes low when an object enters the 0–45 mm range; watch the load LED or PLC input toggle at up to 250 Hz with a 2 ms response time.

What ships with the VTF18-3P5740 and what must I source separately?

The sensor body with M18×1 threads and M12 4-pin male connector is included; you must supply a 10–30 V DC power source and a matching M12 4-pin cable or field-wireable plug.

Which sensing-distance version of the VTF18-3P5740 should I choose for a 40 mm target gap?

This model’s fixed sensing range is 0–45 mm with background blanking, so it covers a 40 mm gap; no alternative range versions are offered for this part number.

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