Biral SWS-100-LW: SWS-200-LW, User Manual

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Product Overview Section 6
56
Sensor Specifications
6.7 Sensor Specifications
The specifications for the SWS lightweight sensor is summarised in the following
pages.
Visibility Measurements (MOR) and Precipitation Measurements
Function Details
Measurement Range – MOR
(Meteorological Optical Range)
Selectable from the following options at
time of order:
10m to 2Km
10m to 10Km
10m to 20Km
10m to 32Km
10m to 50Km
10m to 75Km
Other ranges between 10m and 75Km by
special request.
Measures:
Visibility (MOR – Meteorological Optical
Range), reductions caused by: fog, haze,
smoke, sand, drizzle, rain, snow and
general precipitation.
Measurement Accuracy
Better than 4.5% for MOR of 600m.
Better than 5% for MOR of 1500m.
Better than 5.1% for MOR of 2Km.
Better than 12.5% for MOR of 15Km.
Better than 20% for MOR of 30Km.
Measurement Time Constant 30 seconds.
Stability of MOR Zero Setting
Function Details
Ambient Temperature Effects <= 0.02/km.
Long Term Drift <= 0.02/km.
Precipitation Measurements
Function Details
Detection Threshold: Rain 0.015mm/hr (0.0006 in/hr).
Detection Threshold: Snow
(H
2
0 Equivalent)
0.0015mm/hr (0.00006 in/hr).
Rain Rate (Maximum) ~ 500mm/hr (20 in/hr).