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Cylindrical M18 photoelectric sensor, red LED, IP67 plastic housing, M12 connector

Sick

SICK VL18-4P3640 Photoelectric retro-reflective sensor PNP

SKU CH-5X25-Q020P

Photoelectric retro-reflective sensor detects objects up to 3.7 m with visible red LED, PNP output, M12 connector, IP67 housing

  • Detects objects up to 3.7 m away with visible red LED
  • Cylindrical M18 × 1 housing fits standard mounting threads
  • PNP output with selectable light/dark switching via control cable
  • IP67-rated plastic housing withstands –25 °C to +70 °C environments
  • 250 Hz switching frequency and 2 ms response for fast automation

Industrial retro-reflective sensor

The SICK VL18-4P3640 is a cylindrical photoelectric sensor designed for object detection in automation and material-handling environments. It operates on a 10 V DC to 30 V DC supply and provides a PNP switching output with selectable light or dark switching via an L/D control cable. The housing uses PBT/PC plastic with a PMMA optic and carries an IP67 enclosure rating for dust and water resistance.

M18 mounting and M12 connectivity

The sensor threads into an M18 x 1 cutout and measures 78 mm in overall length, fitting standard sensor brackets without adapter plates. A 4-pin male M12 connector terminates the cable, allowing quick attachment to common fieldbus or I/O modules. The visible red LED emits an axial beam with a 2.8° dispersion, producing a 150 mm light spot at 3 m for reliable alignment on reflectors.

Low power draw and wide temperature range

Power consumption is 30 mA at the rated supply voltage, and the output stage delivers up to 100 mA with a 2 ms response time and 250 Hz switching frequency. Circuit protection covers reverse polarity, short-circuit, overload and inductive kickback. The unit weighs 100 g and operates from –25 °C to +70 °C, with UL file NMFT2.E175606 confirming compliance.

How it compares

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Price $27.99
Cheaper than about 87% of the 5,006 comparable items (median $95.99).

Specifications

Product
Brand nameSICK
Model nameSICK VL18-4P3640

Questions about this item

What is the maximum sensing range before the sensor loses reliable detection?

The maximum sensing range is 0.05 m to 3.7 m, with a reliable sensing range up to 3 m using visible red light.

How much power does the sensor draw during continuous operation?

Power consumption is 30 mA at a supply voltage of 10 V DC to 30 V DC with ripple at 10 %.

Which connector and voltage supply must the installer provide for this sensor?

A male M12 4-pin connector and a 10 V DC to 30 V DC power supply are required for connection.

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