OTT HydroMet

- Model Pluvio2 S - Compact Universal Weighing Precipitation Gauge

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The OTT Pluvio² S weighing precipitation gauge measures the intensity and cumulative precipitation in a broad measuring range from 0 to 3,000 mm/h. The professional rain gauge is a further development of the tried-and-tested OTT Pluvio², with state-of-the-art technology in a compact design that captures up to 400 mm of precipitation on a collecting area of 200 cm². It is virtually maintenance-free, fits onto 2-inch pedestals, needs little space and can replace conventional rain gauges or tipping buckets without any structural work.

  • Parameters measured: Cumulative precipitation, precipitation intensity, bucket content in real time and non real time
  • Measurement technology: Weighing principle
  • Product Highlights: Compact all-weather precipitation gauge for 2-inch pedestals, highly accurate, meets WMO requirements (Guidelines No. 8), nearly maintenance-free, lifetime calibrated
  • Interface: SDI-12, RS-485, impulse, status

  • Compact and relatively light precipitation gauge, with a weather resistant collecting bucket for 400 mm of precipitation (200 cm² collecting area)
  • Minimum space requirement - no problem to install on existing 50 cm x 50 cm concrete bases • any suitable vibration-free 2-inch pedestals can be used again
  • The intensity and cumulative data output fulfils the WMO directive No. 308
  • Highly-developed data capture and processing with signal analysis, filtration and noise reduction as well as algorithms that compensate for the influences of temperature and wind
  • Considerable measuring accuracy of ±1 mm, wide measuring range, and a high data accessibility of 99%
  • Output of high precipitation intensities of up to 3,000 mm/h without any time delay
  • Precise capture of the finest precipitation from as little as 0.03 mm of precipitation in an hour
  • Optionally available with adjustable ring heater – prevents the formation of ice or snow caps and keeps the orifice rim free • also deployable in solar operation in reduced voltage mode
  • Various output interfaces (SDI-12, RS-485, pulse/contact), configurable through USB by means of tablet PC or notebook
  • Low overall operation costs – lifelong calibrated ice-free, drift-free and virtually maintenance-free measuring device

The OTT Pluvio² S is designed for professional use, and is suited for automated and semi-automated measuring networks, especially in locations where only limited space is available.

Examples

  • Automated meteorological measuring networks
  • Weather observer measuring networks
  • Urban hydro-meteorological measuring networks
  • Precipitation stations for flood warnings and precipitation-runoff modelling
  • Precipitation stations as part of research projects
  • Weather radar systems for calibration and Z/R correlation

  • Recordable precipitation: Liquid, solid, and mixed
  • Recordable precipitation amount: 400 mm (approx. 8 l)
  • Collecting area: 200 cm²
  • Measurement method: Weighing measurement method
  • Sensor element: Hermetically sealed load cell
  • Measuring Ranges:
    • Precipitation: 0 ... 50 mm/min or 0 ... 3000 mm/h
    • Cumulative precipitation threshold at 60 min. collection time: 0.03 mm
    • Precipitation intensity threshold: 0.1 mm/h or 6 mm/h
  • Accuracy (at -25°C ... +45°C):
    • Amount: ± 0.1 mm or ±1% of measured value
    • Intensity: ± 0.1 mm/min or ± 6 mm/h or ±1% of measured value
  • Resolution:
    • SDI-12 and RS-485: Amount: 0.001 mm
    • Intensity: 0.001 mm/min or 0.01 mm/h
    • Impulse output: 0.05/0.1/0.2 mm, adjustable
  • Query Interval:
    • Amount: 6 sec ... 60 min
    • Intensity: 1 min
  • Output Delay:
    • Real-time: < 1 min
    • Non-real-time (filterd values): 5 min
  • Measurement Output:
    • Measured data: Intensity RT, amount RT/NRT, amount NRT, amount total NRT, bucket content RT and NRT, temperature of load cell
    • Status output: Pluvio² S status, heating status (if present)
  • Electrical Data:
    • Serial interfaces: SDI-12 V1.3, RS-485 (2- or 4-wire), SDI-12 protocol and command line mode (ASCII)
    • Digital outputs (2/5 Hz): Impulse 0.05/0.1/0.2 mm (adjustable); status 0 ... 120 impulses/min
    • USB (2.0): For service mode
    • Power supply: 5.5 ... 28 V DC, secured against reverse polarity
    • Current consumption (without heating): Typically 9.2 mA at 12 VDC
    • Power consumption (without heating): < 110 mW
  • Ring Heating, Optional:
    • Power supply: 12 ... 28 VDC, typ. 12/24 VDC, secured against reverse polarity
    • Heating capacity: 24 VDC / max. 50 W, temperature control range 45 K (wind speed 0 m/s);
    • 12 VDC / max. 12.5 W, temperature control range 12 K (wind speed 0 m/s)
    • Modes of operation of heater control system: Disabled, continuously enabled, continuously enabled within a specified temperature range, US NWS standard (time-controlled), enabled in case of precipitation (adjustable after-run time)
    • Operating range of orifice rim heater: -40 °C ... + 60 °C (ambient temperature)
  • Mechanical Data:
  • Dimensions and weight:
    • Pluvio² S: 288 mm x 651 mm (Ø x h)
    • Pedestal: Ø 2' / 50 ... 60 mm
    • Weight: Approx. 7.8 kg (empty bucket)
  • Material:
    • Base plate: Stainless steel/aluminium
    • Collecting bucket/bucket support/pipe housing: ASA, UV resistant
  • Environmental conditions:
    • Temperature, in operation: -40 ... +60 °C
    • Temperature, storage: -40 ... +70 °C
    • Relative humidity: 0 ... 100 % rF (non-condensing)
  • Protection and Standards:
    • Pipe housing closed: IP65
    • Pipe housing open: IP63
    • Load cell: IP67
    • EMC: 2004/108/EG; EN 61326-1:2013
    • Salt resistance: EN 60068-2-11

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