Recognized worldwide for its precision and performance, the OTT Pluvio² is an all-weather precipitation gauge that uses superior weight-based technology to measure rainfall, snow or hail.

The Pluvio² determines the collection bucket weight every 6 seconds. The difference between this measurement and the known weight of an empty collection bucket equals the precipitation accumulation. The difference between the current bucket content and the previous measurement equals precipitation intensity.

The OTT Pluvio² evaluates each measurement and compensates for external influences such as temperature, wind, and evaporation.

  • Large collection capacity—750 mm or 1500 mm
  • Accurately measures wide range of precipitation intensities
  • Real-time intensity measurements (in/min or in/hr)
  • Accumulation measurements with consistent 5-minute delay
  • Automatic, continuous measurement
  • Drift-free, hermetically sealed measuring platform
  • Complies with WMO guideline no. 8
  • USB interface for communication with a computer
  • Pluvio² software for basic setup and control measurements
  • 4” flange for easy installation
  • Optional ring heater for use in cold climates (1500 mm version only)

Technical Specifications

Types of precipitation liquid, solid, and mixed
Collecting area 200 cm² and 400 cm²
Collection volume 1500 mm/m² and 750 mm/m²
Collecting area Pluvio2 200: 200 cm2
Pluvio2 400: 400 cm2
Collection volume Pluvio2 200: 1500 mm
Pluvio2 400: 750 mm
Sensor element sealed load cell
Measuring range Precipitation: 0 - 50 mm/min or 0 - 3000 mm/h
Cumulative precipitation threshold at 60 min. collection time: 0.05 mm/h
Precipitation intensity threshold: 0.1 mm/min or 6 mm/h
Resolution Impulse output: 0.1 mm (remaining amounts in 1/100 mm will be factored in during the collecting time of 60 minutes)
SDI-12 and RS-485 interface: 0.01 mm, 0.01 mm/min or mm/h
Accuracy (at -25 °C to +45 °C) Amount: ±0.1 mm or ±1 % of measured value
Intensity: ±0.1 mm/min, ±6 mm/h or ±1% of measured value
Power supply 9.6 - 28 VDC
LowPower: 5.5 - 28 VDC
Power/power consumption ≤180mW, typically 12 mA at 12V
Low Power: ≤55 mW, typically 4.5 mA at 12 VDC
Interfaces USB: configuration/service mode and firmware update
Serial interfaces: SDI-12 or RS-485 (SDI-12 protocol or ASCII.txt)
Digital outputs: impulse 0.1 mm and status (0 - 120 impulses/min; configurable; 5 Hz or 2 Hz)
Measurement output
  • Intensity *RT
  • Amount *RT/*NRT
  • Amount *NRT
  • Amount total *NRT
  • Bucket content *RT and *NRT
  • Temperature of load cell
  • OTT Pluvio2 status
  • Heating status (if present)
Intensity output interval 1 minute
Output delay *RT: 18 seconds
*NRT: 5 minutes
Query interval 6 seconds - 60 minutes
Dimensions Pluvio2 200: 450 mm Ø x 740mm H
Pluvio2 400: 450 mm Ø x 660mm H
Pedestal: 4" Ø
Weight (bucket empty) 15 kg
Material Baseplate: aluminium
Bucket: polyethylene
Pipe housing: ASA,UV-resistant
Environmental conditions Temperature, in operation: -40 °C to +60 °C
Temperature, storage: -50 °C to +70 °C
Relative humidity: 0 to 100% (non-condensing)
Protection Housing/Loadcell: IP 65 / IP 67, resistant to salt fog
EMV: complies with EN 61000-4-2/3/4/5/6, CE conformity


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