





The SICK WLL180T series, including models WLL180T-N474, WLL180T-N473, and WLL180T-N432, represents a standalone fiber-optic amplifier solution designed for use with glass fiber optics. These sensors leverage infrared LED light at 1450 nm wavelength to deliver exceptional sensing performance in both through-beam and proximity configurations. With a maximum sensing range of 1000 mm for through-beam systems and 400 mm for proximity systems, the WLL180T is ideal for precise object detection in packaging, material handling, and assembly applications. The menu-driven interface, combined with a single teach-in button and a dual 4-character digital display, simplifies setup and real-time monitoring. The NPN switching output supports light/dark switching modes, and the programmable delay times offer flexibility for complex timing requirements. Built with a durable ABS/PC plastic housing and rated IP50, these sensors are designed for long-term reliability in industrial environments.
| Parameter | Specification |
|---|---|
| Type | Stand-alone |
| Dimensions (W x H x D) | 10.5 mm x 34.6 mm x 71.9 mm |
| Housing design (light emission) | Rectangular |
| Sensing range max. | 0 mm … 1,000 mm, Through-beam system |
| Sensing range | 0 mm … 400 mm, Proximity system; 0 m … 850 mm, Through-beam system |
| Focus | 5) |
| Type of light | Infrared light |
| Light source | LED |
| Angle of dispersion | Approx. 65° |
| Wave length | 1,450 nm |
| Adjustment | Menu-controlled; Single teach-in button; Cable |
| Delay time | Programmable, 0 ms … 9,999 ms |
| Time functions | Without time delay; Off delay; On delay; ON and OFF delay; One shot |
| Indication | Display |
| Display | LED status display / 2x 4-character digital dual displays, Set value (green indicator) and actual value (red indicator) are displayed simultaneously, display of parameters |
| Special features | Glass fibers necessary |
| Supply voltage | 12 V DC … 24 V DC |
| Ripple | ≤ 10 % |
| Power consumption | 50 mA |
| Switching output | NPN |
| Number of switching outputs | 1 |
| Switching mode | Light/dark switching |
| Switching mode selector | Manually selectable |
| Output current Imax. | ≤ 100 mA |
| Response time | ≤ 16 µs, ≤ 70 µs, ≤ 250 µs, ≤ 2,000 µs, ≤ 8,000 µs |
| Switching frequency | 31.2 kHz; 7.1 kHz; 2 kHz; 250 Hz; 62.5 Hz |
| Input | Multifunctional input MF |
| Connection type | Male connector M8, 4-pin |
| Circuit protection | A; B; C; D |
| Protection class | III |
| Weight | 20 g |
| Housing material | Plastic, ABS/PC |
| Enclosure rating | IP50 |
| Items supplied | BEF-WLL180 mounting bracket |
| Ambient operating temperature | –25 °C … +55 °C |
| Ambient storage temperature | –40 °C … +70 °C |
| UL File No. | NRKH.E300503 & NRKH7.E300503 |

What Does Our Clients Say
Mitsubishi MR-J4
Laura Navas
Great product!
2019/12/01
Keyence sensor
EQDR SALES
Original and fast!
2020/02/22