SWS-100 Visibility Sensor
Description
Overview
The SWS-100 is a compact, cost-effective forward scatter visibility sensor designed for applications requiring reliable present weather detection and visibility measurement. Part of the Biral SWS family, it provides robust performance in harsh environments with a simple two-head design.
Key Features
- Forward scatter measurement principle for accurate visibility readings
- Compact and lightweight two-head design
- Suitable for road weather, general aviation, and transport applications
- Low power consumption
- IP66 weather protection rating
- Simple installation and minimal maintenance requirements
- 3-year warranty
Applications
- Road weather information systems (RWIS)
- Aerodrome and airport operations
- Rail network visibility monitoring
- Port and harbour operations
- General meteorological observation
Why Choose the SWS-100?
The SWS-100 delivers professional-grade visibility measurement in a compact, affordable package. Designed and manufactured by Biral (Senseca UK), it benefits from decades of experience in optical sensors for meteorology and transportation safety. The sensor’s proven forward scatter technology provides consistent, accurate readings even in challenging conditions such as fog, rain, snow, and dust.
For more detailed specifications, documentation, and ordering information, please contact us or visit the manufacturer’s product page.
| Measurement | |
|---|---|
| Measurement | Visibility, MOR; Present weather (Drizzle, Rain and Snow) |
| Measurement Principle | Forward scatter 45° |
| Measurement Error | 5% at 1,500m |
| Outputs | |
| Output | RS232, RS422 or RS485; 0 - 10 V; 4-20mA (optional); 2 Threshold and 1 Fault Relay |
| Power Requirements | |
| Sensor Power | 9 – 36 V DC (5.2W) |
| Hood heating power | 24 V AC or DC (24W) |
| Window heating and contamination monitoring | Fitted |
| Environmental | |
| Operating Temperature | -40°C to 60°C |
| Operating Humidity | 0 – 100% RH |
| Protection rating | IP66/IP67 |
| Weight | 4.2 kg |
Datasheets
- SWS-100 Datasheet
- SWS Series: Transient Voltage Protection
- Addition of a 'TEST' command to the Visibility and Present Weather Sensors
- SWS Series: Calibrator Datasheet
- SWS Series: Test Plaques Datasheet
Manuals
Publications & White Papers
- The effects of surface reflections and extraneous light on forward scatter sensors
- Mounting of Biral VPF and SWS Series Visibility & Present Weather Sensors on Wind Turbines
- Wind Energy Meteorological Sensors Brochure
- Aviation Meteorological Sensors Brochure
- Introduction to atmospheric visibility estimation
- The use of Biral forward scatter visibility meters in the presence of haze, smoke and sandstorms







