Product Overview
Section 6
50
Present Weather Definition/Automated Measurements
In addition to its optimal and unique measurement capabilities, the SWS – LW
sensor has a number of distinctive physical features:
Compactness:
The sensor is a single package, small in size and particularly light in weight. It
can be readily installed by one person and can be used in portable or fixed
installations.
Low Power Consumption:
The SWS – LW series of sensors have been designed specifically for low power
applications. These include temporary installations away from mains power,
where battery size and weight are of particular importance.
Proven Software:
The basic software incorporated into the sensor has evolved over a long period
of time and has been tested and proven in hundreds of sensors.
Ease of Maintenance and Calibration:
Routine maintenance, including a check on calibrations, is performed in a
matter of a few minutes. A re-calibration if required takes only slightly longer
and is easily performed by one person.
6.5
Present Weather Definition
The term "Present Weather" is generally employed to define a large class of
atmospheric phenomena that includes tornado activity, thunderstorm activity,
precipitation, obstructions to vision, and "other atmospheric phenomena" such as
aurora. For purposes of Automated Present Weather Sensors, the term "present
weather" is restricted to those atmospheric phenomena that are local to the
sensor. These phenomena include: (1) all forms of liquid and frozen precipitation;
e.g.
,
rain, drizzle, snow, snow pellets, snow grains, ice pellets (formerly sleet) and
hail, and (2) those suspended particles that are classed as obstructions to vision;
namely, mist, fog, haze, dust and smoke.
6.6
Automated Measurements
6.6.1
General
These sensors utilise microprocessor technology to perform automatic visibility,
precipitation and temperature measurements. The standard version is DC
powered, however, a mains converter is also available. Patented techniques are
Summary of Contents for SWS-100-LW: SWS-200-LW
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