Visibility and Present Weather Sensor The SWS-200 is the sensor of choice where extended visibility range measurement combined with reliable present weather identification in a compact package is required. The use of a backscatter receiver significantly improves the accuracy of present weather reports. The SWS-200 is easily integrated into monitoring and logging systems using the serial communication interface whilst analogue output options and alarm relays can be used for legacy systems and activation of local warnings. Airports need to monitor visibility across the airfield to ensure the safety of taxiing aircraft, for Runway Visual Range (RVR) calculation and for transmission to aircraft as part of the METAR. The SWS-200 can fulfil all of these roles and also provides present weather information for inclusion in METAR reports. The accuracy and repeatability of the SWS-200’s visibility and present weather measurements combined with its ability to be deployed in large numbers make it an attractive solution for national weather services. The SWS sensor family is designed to be easily installed by a single person and has an interface which simplifies system integration. Selftest features include window contamination monitoring which automatically corrects the output data and provides two stage warnings allowing maintenance to be performed most efficiently. Calibration checks and recalibration are simple and quickly accomplished in the field by a single person. Features • Selectable measurement range up to 75 km • WMO 4680 present weather codes • Window contamination monitoring and compensation • Digital, analogue and switching relay outputs • Comprehensive self-test and maintenance data Visibility and Present Weather Measurements Measurement range Selectable: 10 m to 2 km, 10 km, 20 km, 32 km, 50 km or 75 km Measures Visibility and present weather: fog, haze, smoke, sand, drizzle, rain, snow and general precipitation Measurement accuracy Measurement principle Hood heating power Power consumption 3.5 W (Basic sensor) 2.5 W (Window heaters) 36 W (Hood heaters) Rain rate accuracy (AC with optional mains adaptor) Rain: 0.015 mm/hr (0.0006 in/hr) Snow: 0.0015 mm/hr (0.00006 in/hr) Maximum rain rate Power supply Forward scatter meter with 39° to 51° angle Precipitation rain resolution Power Requirements MicroStep-MIS, www.microstep-mis.com © 2016. All specifications subject to ch

Visibility and Present Weather Sensor Outputs and Reports Self-test capability Digital outputs User confidence check Analog outputs Window cleaning Automatic compensation and warnings Field calibration With optional calibration kit Switching relays • Relay 1 = fault (providing flexible • Relay 2 = visibility (user configurations) selectable threshold) • Relay 3 = precipitation yes/no or snow yes/no or visibility (user selectable) Present weather Additional Features Hood heaters Window contamination Filtered as standard to the monitoring transmitter window. Optional on receivers. Window heaters...