Sick
Sick VL18-3F3440 Photoelectric retro-reflective sensor PNP
Detects objects up to 3.7 m with a visible red LED, PNP output, and an IP67-rated nickel-plated brass housing
- Visible red LED aids alignment
- 7 m max range covers long distances
- M18 metal housing fits standard mounts
- PNP light-switching output simplifies wiring
- IP67 rating withstands harsh environments
Sick VL18-3F3440 retro-reflective sensor
The Sick VL18-3F3440 is a cylindrical photoelectric retro-reflective sensor with an M18 x 1 thread and a 75 mm housing length. It operates on a 10 V DC to 30 V DC supply voltage and uses visible red light from an LED source. The sensor provides a PNP switching output with light switching mode and a maximum output current of 100 mA. Connection is made via a male M12 4-pin connector.
Suited for polarised detection up to 3.7 m
This sensor suits applications requiring polarised retro-reflective detection within a sensing range of 0.05 m to 3.7 m. The radial optical axis and approximate 2.8° angle of dispersion cover a 150 mm light spot at 3 m distance. Buyers needing diffuse or through-beam detection principles should look at alternative sensor types. The potentiometer allows 270° sensitivity adjustment for precise setup.
IP67 metal housing for 10 V to 30 V DC systems
The nickel-plated brass housing with PMMA optics achieves an IP67 enclosure rating and operates from –25 °C to +70 °C. Circuit protection includes categories A, B, C and D alongside protection class III. A response time of 2 ms and 250 Hz switching frequency support fast cycling. The unit weighs 120 g and carries UL file number NMFT2.E175606 for compliance verification.
Highlights
- Visible red LED aids alignment
- 7 m max range covers long distances
- M18 metal housing fits standard mounts
- PNP light-switching output simplifies wiring
- IP67 rating withstands harsh environments
Specifications
| Brand | Sick |
|---|---|
| Model | SICK VL18-3F3440 |
Questions about this item
What power supply voltage range must I already have for the VL18-3F3440 sensor to operate?
The sensor requires a DC supply between 10 V and 30 V with ripple no greater than 10 %.
Will the sensor's M12 4-pin connector fit the cables I already use for older M18 photoelectric sensors?
Yes, the male M12 4-pin connection is a standard industrial interface compatible with existing M12 cables.
How can I verify the sensor is detecting correctly after I mount it at a 3 m distance?
At 3 m the light spot is approximately Ø 150 mm; adjust the 270° potentiometer until the output switches reliably when the reflector interrupts the beam.
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