Visibility sensor VS2k

Overview
The VS2k visibility sensor from Lufft provides reliable visibility measurement for road traffic monitoring on motorways, highways and bridges. It reports visibility values up to 2000 m (specifications list a broader measurement range of 10 m–20,000 m). The VS2k-UMB variant is configured via the UMB Config Tool: read/change configuration, perform calibration, poll current measurements and load/store configuration files. Measurement output uses the standard Lufft UMB protocol.

Key Features / Functionality

• Visibility measurement up to 2000 m (spec. range 10 m–20,000 m)
• Active Spider Defense (ASD): built-in vibrating motor reduces spider webs and contamination
• Configuration via UMB Config Tool: read/change settings, calibration, polling, load/store configs
• Outputs & communication: Lufft UMB protocol (UMB, ASCII-2.0), RS485 (2-wire, half duplex), analogue 4–20 mA
• Open, free-to-use communication protocol for straightforward system integration

Benefits

• Reduced maintenance: ASD minimizes spider-related fouling and cleaning frequency
• Easy integration: standard protocols and interfaces simplify connection to existing systems

Technical specifications

• Power supply: 20–30 VDC (typ. 24 VDC)
• Weight (without mounting bracket): approx. 4 kg; with mounting bracket: approx. 5.6 kg
• Housing rating: IP66
• Operating humidity: 0–100 % RH (non-condensing)
• Accuracy: ±10 %
• Measurement range: 10 m–20,000 m (typical reporting up to 2000 m)
• Operating temperature: -40 to +60 °C
• Storage temperature: -40 to +70 °C
• Resolution: 1 m; averaging intervals: 60 s, 10 min
• Interfaces: RS485 (2-wire, half duplex); analogue output 4–20 mA
• Protocol: UMB, ASCII-2.0
• Dimensions: 508.5 x 230 x 85 mm
• Certifications: Class III (SELV), CE