Visibility sensor for aviation and weather station monitoring

SWS-050

Visibility sensor for aviation and weather station monitoring, measuring MOR and EXCO from 10 m to 40 km with RS232/RS422/RS485 outputs, hood heating and contamination monitoring.
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Introduction

Reliable visibility data is essential for aviation, weather stations and fixed monitoring sites where changing conditions affect operational decisions. SWS-050 uses forward scatter technology to measure Meteorological Optical Range (MOR) and Extinction Coefficient (EXCO) over a fixed 10 m to 40 km range, with performance comparable to a transmissometer.
 
The sensor is calibrated in accordance with ICAO 9328 and traceable to a national weather service transmissometer. Its measurement performance, accuracy and resolution comply with ICAO and WMO specifications for aviation and RVR use, and it can be paired with the ALS-2 Ambient Light Sensor for instrumented Runway Visual Range systems.
 
Outdoor reliability is supported by standard hood heating, window heaters and contamination monitoring on transmitter and receiver windows. Automatic correction and two-stage cleaning warnings help plan maintenance efficiently. Serial outputs via RS232, RS422 or RS485 provide ASCII data at selectable 10 to 300 s intervals or on request, with optional relay outputs for fault and threshold signaling.

Aviation visibility
Measures MOR and EXCO from 10 m to 40 km for aviation and weather sites.
Traceable calibration
Calibrated to ICAO 9328 and traceable to a national weather service transmissometer.
Low-maintenance optics
Window contamination monitoring provides correction and cleaning warnings.
Serial integration
RS232, RS422 and RS485 outputs support ASCII data transfer.

Features

Forward scatter principle

Uses a forward scatter meter with 39° to 51° angle, centered at 45°, to measure visibility.

Weather code output

Reports 3 WMO 4680 obstruction-to-vision codes, including no significant weather, haze or smoke, and fog.

RVR system interface

Optional ALS-2 Ambient Light Sensor interface appends ambient light data to the SWS-050 message

Heating system

Hood heating is fitted for extreme environments, with window heaters fitted as standard.

Self-test functions

Abbreviated self-test information is included in every message, with full self-test report available on request.

Environmental housing

Powder coated aluminum housing with IP66/IP67 protection operates from -40 °C to +60 °C and 0...100% RH.

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