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Cylindrical metal sensor with M18 thread, 78 mm long, M12 connector

Sick

Sick VS/VE18-3F3240 Through-beam Photoelectric Sensor PNP

SKU CH-PHA0-4SNS0

Through-beam photoelectric sensor detects objects up to 20 m with 14 m operating range, PNP output, M12 connector, and IP67 metal housing

  • Detects objects up to 20 m with through-beam infrared sensing
  • Adjustable sensitivity via 270° potentiometer for precise tuning
  • Fast 250 Hz switching frequency suits high-speed lines
  • Rugged IP67 nickel-plated brass housing withstands harsh environments
  • Operates reliably from –25 °C to +70 °C on 10–30 V DC

Industrial Through-beam Sensor for Long-range

The Sick VS/VE18-3F3240 is a cylindrical through-beam photoelectric sensor designed for industrial automation tasks requiring extended reach. Its infrared LED emitter and receiver pair achieve a maximum sensing range of 20 metres and an operational range up to 14 metres. The M18 nickel-plated brass housing fits standard mounting threads, while the axial optical axis simplifies alignment on conveyor lines or packaging machinery. The PNP light-switching output integrates directly with common PLC input modules.

Low Power Draw and Rugged Sealing

Operating from a 10 to 30 V DC supply, the unit draws only 30 mA and switches at 250 Hz with a 2 ms response time. Circuit protection covers reverse polarity, short-circuit, overload and inductive kickback, keeping the output stage reliable under electrical noise. The IP67-rated metal enclosure withstands wash-down environments and operates continuously from –25 °C to +70 °C without active cooling. A test input on the sender allows functional checks by pulling the TE pin to 0 V.

Potentiometer Adjustment and M12 Connectivity

A 270° sensitivity potentiometer on the receiver lets technicians fine-tune the detection threshold for transparent or low-contrast targets without software tools. The light spot reaches approximately 700 mm diameter at the 14 m limit, with a narrow 2.8° dispersion angle that reduces false triggers from adjacent objects. Connection is via a standard 4-pin M12 male connector, enabling quick replacement using off-the-shelf cordsets. The sensor carries UL file number NMFT2.E175606 for compliance verification.

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Price $97.99
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Specifications

Product
Brand nameSICK
Model nameSICK VS/VE18-3F3240

Questions about this item

How do I mount the M18 cylindrical sensor and align the axial optical axis correctly?

Mount the M18 x 1 threaded housing into a matching bracket or cut-out, then tighten the lock nuts to the specified torque. Point the emitter and receiver directly at each other along the axial axis; the 2.8° dispersion angle gives a 700 mm spot at 14 m, so fine-tune alignment before final tightening.

What maintenance does the infrared LED light source require over time?

The LED is solid-state with no user-replaceable parts. Periodically clean the front lenses with a soft, lint-free cloth to remove dust or oil that would reduce the 20 m maximum sensing range. Verify the 270° potentiometer sensitivity setting after any heavy vibration or temperature cycling between –25 °C and +70 °C.

At what distance does the 250 Hz switching frequency become the limiting factor?

The 250 Hz switching frequency (2 ms response time) is an electronic limit independent of distance. It caps the maximum detectable event rate at 250 transitions per second whether the target is at 1 m or the full 14 m sensing range. Ensure the application pulse width exceeds 2 ms.

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