OTT Pluvio² S

Compact universal weighing precipitation gauge

Category: Hydrometry Tags: Hydrometry, Ott, Water

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

Advantages

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

Examples of Use

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

Resources

OTT Pluvio² – USB interface driver – EN Version: V 2.12.00 Download (login necessary)	OTT Pluvio² / OTT Pluvio² S / OTT Pluvio² L – Operating program Version: V 1.08.3 Release notes Download (login necessary)	Operating Instructions Precipitation gauge OTT Pluvio² S Download
Leaflet – Compact weighing precipitation gauge OTT Pluvio² S Download	OTT Pluvio² S – Firmware – EN Version: V 1.02.2 Release notes Download (login necessary)	OTT Pluvio² S – Konformitätserklärung \| Declaration of Conformity \| Declaration de Conformité Download

Accessories

OTT MetSystems

OTT netDL Data Logger

Technical Data

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