SWS-250 Visibility & Present Weather Sensor
The Biral SWS-250 is a high-accuracy forward scatter visibility and present weather sensor reporting 39 WMO codes, designed for ICAO-compliant aviation meteorology and professional weather networks.
Description
Overview
The SWS-250 is Biral’s (Senseca UK) most comprehensive visibility and present weather sensor, featuring both forward scatter and backscatter receivers with a 45° scatter angle for superior hydrometeor discrimination. It reports visibility MOR and up to 39 WMO Table 4680 present weather codes, making it the sensor of choice for high-accuracy aviation meteorology and national weather service networks.
Key Features
- Forward scatter at 45° with dedicated backscatter receiver for superior precipitation type discrimination
- Reports 39 WMO Table 4680 present weather codes
- Visibility measurement from 10m to beyond 50km
- Accurate distinction of rain, drizzle, snow, hail, fog, mist, and mixed precipitation
- Heated optics for reliable ice-free operation
- IP66/IP67 weatherproof and robust construction
- Hood heating for 24V AC/DC operation in freezing environments
- 3-year warranty
Applications
- ICAO-compliant civil aviation meteorological reporting
- National meteorological service AWS networks
- Military airfield operations
- Road weather and highway visibility monitoring
- Research-grade present weather observation
- Port and harbour marine weather
Technical Specifications
| Parameter | Specification |
|---|---|
| Measurement | Visibility MOR, 39 WMO Table 4680 present weather codes |
| Measurement Principle | Forward scatter 45°, with backscatter receiver |
| Accuracy | 5% at 1,500m |
| Operating Temperature | -40°C to +60°C |
| Power Supply | 9–36V DC (6W sensor), 24V AC/DC (36W hood heating) |
| Protection Rating | IP66/IP67 |
| Weight | 3.5 kg |
| Output Interface | RS-232 / RS-485 |
Why Choose the SWS-250?
The SWS-250 represents the pinnacle of Biral’s SWS sensor family. Its 45° forward scatter geometry with backscatter channel provides the best possible hydrometeor discrimination available in a compact present weather sensor. This makes it ideal for aviation authorities that require precise, unambiguous present weather reporting in compliance with ICAO standards. With a proven measurement accuracy of 5% at 1,500m and operating range from -40°C to +60°C, it performs reliably in the most challenging environments worldwide.
For detailed specifications, datasheets, and ordering information, please contact us or visit the manufacturer’s product page.