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Overview
The PWS100 is a laser-based sensor that measures precipitation and visibility by accurately determining the size and velocity of water droplets in the air. It can be used in weather stations in road and airport applications. The PWS100 uses advanced measurement techniques and algorithms to calculate individual precipitation particle type.
To enhance the PWS100 algorithms, Campbell Scientific recommends adding a CS215-PWS Temperature and Relative Humidity Probe (listed in the Ordering information under Common Accessories), which will cause the data from the CS215-PWS to be fed directly into the PWS100 precipitation type and visibility algorithms.
Note: Campbell Scientific does not recommend using the PWS100 for marine applications.
Read MoreBenefits and Features
- Identifies many precipitation types, including drizzle, rain, snow, hail, and graupel
Images
Detailed Description
Due to the PWS100's advanced measurement technique and fuzzy logic algorithms,it can determine individual precipitation particle type from accurate size and velocity measurements and the structure of the received signal. Auxiliary measurements of temperature and relative humidity (RH) provide improved particle classification.
The PWS100 consists of a Digital Signal Processor (DSP) housing unit connected to a sensor arm that contains one laser head and two sensor heads. Each sensor head is 20° off axis to the laser unit axis—one in the horizontal plane and the other in the vertical plane. The PWS100 ships with a mounting bracket that attaches the DSP housing to a mast or pole.
Specifications
| Measuring Area | 40 cm2 per light sheet |
| IP Rating | IP 66 (NEMA 4X) |
| Housing Material | Iridite NCP conversion coated aluminium (RoHS compliant) and hard anodized aluminum |
| Communication | RS-232, RS-422, or RS-485 |
| Baud Rate | Selectable from 300 bps to 115.2 kbps |
| Control Unit | Custom DSP Board |
| EMC Compliance | Tested and conforms to BS EN61326:1998 |
| Dimensions | 115 x 70 x 40 cm (45.28 x 27.56 x 15.75 in.) |
| Weight | 8 kg (17.6 lb) |
Power Requirements |
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| DSP Power | 9 to 24 Vdc (or 9 to 16 Vdc with CS215-PWS Temperature and RH sensor) |
| Current Consumption | 200 mA to 1 A |
| Hood Heater | 24 Vac or dc, 7 A |
Optical |
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| Laser Source | Near-infrared diode, eye safe Class 1M unit output |
| Peak Wavelength | 830 nm |
| Modulation Frequency | 96 kHz |
| Receivers | Photodiode with band pass filters |
| Spectral Response | Maximum spectral sensitivity at 850 nm, 0.62 A/W (0.6 A/W at 830 nm) |
| Lens Check Light Source | Near-infrared LED |
Measurement |
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| Particle Size | 0.1 to 30 mm (0.0039 to 1.18 in.) |
| Size Accuracy | ±5% (for particles greater than 0.3 mm [0.0118 in.]) |
| Particle Velocity | 0.16 to 30 m/s |
| Velocity Accuracy | ±5% (for particles > 0.3 mm [0.012 in.]) |
| Types of Precipitation Detected | Drizzle, rain, snow grains, snowflakes, hail, ice pellets, graupel, mixed (combination of types above) |
| Rain Rate Intensity Range | 0 to 999.9 mm/h-1 |
| Rainfall Resolution | 0.0001 mm |
| Rain Total Accuracy |
Typically ±10% Accuracy figures are for laboratory conditions with reference particles and standards; accuracy will be degraded for windy conditions, frozen precipitation, and very high rainfall rates. |
| Visibility Range | 0 to 20,000 m (0 to 65,616.8 ft) |
| Visibility Accuracy | ±10% to 10,000 m (±10% to 32,808.4 ft) |
| Visibility Measurement Interval | User-selectable from 10 s to 2 h |
| External Sensors | SDI-12 compatible sensors supported (such as the CS215-PWS Temperature and RH Probe) |
| Detection Threshold | > 0.02 mm hr-1 |
| Accumulation Accuracy | ±10% |
Compatibility
Please note: The following shows notable compatibility information. It is not a comprehensive list of all compatible products.
Dataloggers
| Product | Compatible | Note |
|---|---|---|
| 21X (retired) | ||
| CR10 (retired) | ||
| CR1000 (retired) | ||
| CR10X (retired) | ||
| CR200X (retired) | ||
| CR206X (retired) | ||
| CR211X (retired) | ||
| CR216X (retired) | ||
| CR23X (retired) | ||
| CR295X (retired) | ||
| CR300 | ||
| CR3000 (retired) | ||
| CR310 | ||
| CR500 (retired) | ||
| CR5000 (retired) | ||
| CR510 (retired) | ||
| CR6 | ||
| CR800 (retired) | ||
| CR850 (retired) | ||
| CR9000 (retired) | ||
| CR9000X (retired) |
Documents
Product Brochures
Downloads
PWS100 Present Weather Viewing Software v.2.6.1 (32 MB) 24-01-2012
Designed to complement the PWS100 the Present Weather Viewer provides a simple yet comprehensive interface showcasing many of the capabilities of the PWS100 whilst providing easy configuration of key sensor features.
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