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Cylindrical M18 photoelectric sensor with M12 connector

Sick

Sick VS/VE18-3F3640 Through-beam Photoelectric Sensor PNP

SKU CH-M2V9-QFY79

Through-beam photoelectric sensor detects objects up to 20 m with a 10–30 V DC PNP output and IP67 housing

  • Through-beam detection reaches 20 m maximum range
  • Infrared LED emits narrow 2.8° beam for precise targeting
  • PNP light-switching output delivers 100 mA at 250 Hz
  • M12 4-pin connector fits standard industrial cabling
  • IP67-rated PBT/PC housing withstands –25 °C to +70 °C

Industrial Through-beam Sensor

The Sick VS/VE18-3F3640 is a cylindrical through-beam photoelectric sensor designed for industrial automation tasks. It operates on a 10 V DC to 30 V DC supply and provides a PNP light-switching output. The M18 x 1 threaded housing measures 78 mm in length and is rated IP67 for harsh environments.

Range and Alignment Constraints

The sensor offers a maximum sensing range of 20 m with a practical operating range up to 14 m using infrared LED emission. At the 14 m limit the light spot reaches Ø 700 mm with an approximate 2.8° dispersion angle. The fixed axial optical axis and lack of adjustment mean precise mechanical alignment is essential during installation.

Output and Wiring Decisive Factor

The 4-pin M12 male connector carries a PNP switching output rated at 100 mA maximum with a 2 ms response time. This output type and connector pinout determine compatibility with your control system input cards. Buyers needing NPN logic or a different connector format must select an alternative model.

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Price $94.99
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Specifications

Product
Brand nameSICK
Model nameSICK VS/VE18-3F3640

Questions about this item

Should I use the 20 m maximum range or the 14 m sensing range for my layout?

Plan for the 14 m sensing range; the 20 m figure is the absolute maximum under ideal conditions while 14 m is the reliable operating distance with the specified 700 mm light spot.

What does the 250 Hz switching frequency mean on a production line?

The sensor can change state up to 250 times per second with a 2 ms response time, so it reliably detects objects moving fast enough to cross the beam within 4 ms intervals.

How does the M12 4-pin connector limit the wiring options?

The 4-pin M12 carries supply (10–30 V DC), PNP light-switching output (max 100 mA), and a test input for sender-off; no separate dark-switching or IO-Link channel is available.

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