PWS100 Present Weather Sensor - Campbell Scientific
PWS100 Present Weather Sensor - Campbell Scientific
PWS100 Present Weather Sensor - Campbell Scientific
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Section 5. Specifications<br />
5.6.2 Precipitation Measurements<br />
Particle Size*:<br />
Size Accuracy*:<br />
0.1 mm to 30 mm (0.004 in to 1.18 in)<br />
± 5% (for particles >0.3 mm)<br />
Particle Velocity: 0.16 ms -1 to 30 ms -1<br />
Velocity Accuracy*:<br />
Types of Precipitation<br />
Detected:<br />
Rain Rate Intensity Range:<br />
Rainfall Resolution:<br />
Rain Total Accuracy*:<br />
DSD bin sizes:<br />
Data Output:<br />
External <strong>Sensor</strong>s:<br />
± 5% (for particles >0.3 mm)<br />
Drizzle, rain, snow grains, snow flakes, hail,<br />
ice pellets, graupel (heavily rimed solid<br />
precipitation), freezing rain, freezing drizzle,<br />
mixed (combination of types above)<br />
0 to 400 mm h -1 (M-P Distributed)<br />
0.0001 mm<br />
Typically ±10% (accuracy will be degraded for<br />
windy conditions, frozen precipitation, and<br />
very high rainfall rates).<br />
0.1 mm (diameter) 0.1 ms -1 (velocity)<br />
Raw parameter output (particle size, particle<br />
velocity, signal peak value, signal pedestal<br />
value), WMO SYNOP codes (4680, W a W a -<br />
precipitation and obscurant type), WMO<br />
METAR codes (4678, W a W a - precipitation<br />
and obscurant type), NWS code, drop size<br />
distribution (DSD) statistics, particle type<br />
distribution, size / velocity intensity maps,<br />
precipitation rate, precipitation accumulation,<br />
visibility range and internal checks<br />
(temperatures, lens contamination, processing<br />
limits).<br />
CS215-PWS supported for temperature / RH<br />
measurement; SDI-12 compatible sensors<br />
supported.<br />
*Accuracy values are for laboratory conditions with reference particles and<br />
visibility standards.<br />
5.6.3 Data Storage and Buffering<br />
The <strong>PWS100</strong> has a large internal memory that is split up to store different<br />
types of data. One buffer, the particle buffer, is used to hold raw signal data<br />
captured from the detectors. The size of this buffer and the speed at which it<br />
can be processed is a limit on the maximum rainfall rates the sensor can<br />
measure. For most users, this is not a limitation; if it may be a limitation, please<br />
read the description below.<br />
5-3