OTT Pluvio² S
Compact universal weighing precipitation gauge
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
- Cumulative precipitation, precipitation intensity, bucket content in real time and non real time
- Weighing principle
- Compact all-weather precipitation gauge for 2-inch pedestals, highly accurate, meets WMO requirements (Guidelines No. 8), nearly maintenance-free, lifetime calibrated
- 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
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OTT Pluvio² / OTT Pluvio² S / OTT Pluvio² L - Operating program
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OTT Pluvio² S - Konformitätserklärung | Declaration of Conformity | Declaration de Conformité
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| 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 |