Sick
Sick VL18-4N3240 photoelectric retro-reflective sensor NPN
Detects objects up to 3.7 m with visible red LED, NPN output, M12 connector, IP67-rated metal housing
- Retro-reflective sensing up to 3.7 m with visible red LED
- NPN light/dark switching selectable via control cable
- 250 Hz switching frequency for fast response
- IP67 nickel-plated brass housing withstands –25 °C to +70 °C
- M12 4-pin connector on 10–30 V DC supply
Sick VL18-4N3240 retro-reflective sensor
The Sick VL18-4N3240 is a cylindrical photoelectric sensor designed for industrial detection tasks. It suits engineers and technicians who need reliable presence sensing in automation or conveyor systems. The metal housing and IP67 rating allow installation in harsh environments. It operates on 10 V DC to 30 V DC supply voltage.
NPN switching output with selectable light/dark mode
The sensor provides an NPN switching output rated at 100 mA maximum current. Light or dark switching is selected via the L/D control cable for application flexibility. A 270° potentiometer adjusts sensitivity across the sensing range. Response time is 2 ms with a 250 Hz switching frequency.
Low power draw and wide temperature range
Power consumption is 30 mA at the rated supply voltage. The unit weighs 120 g and uses a nickel-plated brass housing with PMMA optics. It operates from –25 °C to +70 °C ambient temperature. The M12 4-pin male connector simplifies wiring in control cabinets.
Highlights
- Retro-reflective sensing up to 3.7 m with visible red LED
- NPN light/dark switching selectable via control cable
- 250 Hz switching frequency for fast response
- IP67 nickel-plated brass housing withstands –25 °C to +70 °C
- M12 4-pin connector on 10–30 V DC supply
Specifications
| Brand | Sick |
|---|---|
| Model | SICK VL18-4N3240 |
Questions about this item
How far can the sensor reliably detect an object in a real machine?
The practical sensing range is 0.05 m to 3 m, with a maximum reach of 3.7 m under ideal conditions.
What does the M12 4-pin connector cap in practice?
It delivers 10–30 V DC supply, carries the NPN switching signal and the light/dark control wire, and is rated for 100 mA output current.
What clearance and mounting thread does the sensor need to fit?
It requires an M18 × 1 threaded hole, 78 mm housing length, and weighs 120 g with a nickel-plated brass body.
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