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Cylindrical nickel-plated brass sensor, M18 thread, 78 mm long, M12 4-pin connector

Sick

Sick VL18-3E3240 Through-beam photoelectric sensor NPN

SKU CH-34FP-2JB7V

A through-beam photoelectric sensor with 0–20 m range, NPN output and IP67 metal housing

  • Reliable detection up to 20 m with through-beam infrared sensing
  • Adjustable sensitivity via 270° potentiometer for precise application tuning
  • Fast 250 Hz switching frequency suits high-speed automation tasks
  • Rugged IP67-rated nickel-plated brass housing withstands harsh environments
  • Wide 10–30 V DC supply voltage simplifies system integration

Industrial photoelectric sensor for 20 m range

The Sick VL18-3E3240 is a through-beam photoelectric sensor with NPN switching output designed for presence detection in industrial automation. Its cylindrical M18 metal housing measures 78 mm in length and carries an IP67 enclosure rating for dust and water resistance. The sensor operates on 10 V DC to 30 V DC supply voltage and uses an infrared LED light source with a 2.8° dispersion angle.

Upgrades from shorter-range or diffuse sensors

This model replaces sensors that cannot span the 0 m to 20 m maximum sensing range or that lack the 14 m reliable sensing range with a 700 mm light spot at distance. The jump is worth it when applications demand axial optical alignment, 250 Hz switching frequency and potentiometer sensitivity adjustment across 270° for precise detection of opaque objects in harsh environments.

Fits M18 mounting with M12 connector wiring

The nickel-plated brass housing threads into standard M18 x 1 cut-outs and connects via a 4-pin male M12 connector for quick integration into existing control cabinets. The NPN light-switching output delivers up to 100 mA with a 2 ms response time, while protection class III circuitry and –25 °C to +70 °C operating temperature free up design margin for outdoor or unheated installations.

How it compares

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

Price $70.99
Cheaper than about 69% of the 5,006 comparable items (median $95.99).

Specifications

Product
Brand nameSick
Model nameSICK VL18-3E3240

Questions about this item

What size threaded hole does the M18 x 1 housing need for mounting?

The sensor uses an M18 x 1 thread, so it requires an 18 mm diameter clearance hole with a 1 mm pitch thread for secure mounting.

How do I wire the 4-pin M12 connector and where do I connect the test input?

Connect the M12 plug to a 10–30 V DC supply; the test input (TE) switches the sender off when pulled to 0 V.

Will the potentiometer or LED need periodic replacement during the sensor's life?

The 270° potentiometer adjusts sensitivity mechanically and the infrared LED is solid-state; neither is a user-replaceable part.

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