The OTT Pluvio² L is an all-weather precipitation gauge that uses superior weight-based technology to measure the amount and intensity of rain, snow, and hail. Developed in conjunction with industry-leading meteorological services, the OTT Pluvio² L employs a high-precision load cell and algorithms that compensate for wind, temperature, and evaporation, ensuring the highest accuracy precipitation measurements over time.

Parameters measured:Cumulative precipitation, precipitation intensity, bucket content in real time and non real time
Measurement technology:12
Product highlights:All-weather precipitation gauge without moving parts according to WMO guide line No. 8
Interfaces:SDI-12 / RS-485, pulse

Advantages

Accurate measurement: precipitation accuracy within 0.004 inches with accumulation and intensity readings and filter algorithms to compensate for wind, temperature, and evaporation
Virtually maintenance-free operation: lifetime factory calibration, drift-free measurements, and robust protective housing eliminate field visits for instrument service
Multiple communication interfaces: SDI-12, RS-485, and Pulse Output options
Solar panel power options make the instrument ideal for remote locations
Easy software setup and a USB interface for communication with computer
Wind protection shield available for particularly exposed locations
Heated ring option available to prevent the accumulation of snow on the sensor
Easy installation onto 4″ pipes

Examples of Use

Precipitation Measurement: Continuous, real-time measurement of rain, snow, hail, and sleet in all monitoring environments, even remote environments without power supply
Early Flood Warning: when combined with water level sensors, the Pluvio² L is the central component in an early flood warning system
Urban hydrology: Even in the event of heavy rainfall of up to 3000 mm/h the Pluvio² L provides precise intensity values for controlling stormwater runoff to the sewer system.

Technical Data

Recordable precipitation	Liquid, solid, and mixed
Collecting area	200 cm² / 400 cm²
Recordable precipitation amount	1500 mm / 750 mm
Measurement method	Weighing measurement method
Sensor element	Sealed load cell
Measuring ranges
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
Accuracy (at -25 … +45 °C )
Amount	±0.1 mm or ±1 % of measured value
Intensity	±0.1 mm/min, ±6 mm/h or ±1 % of measured value
Resolution
SDI-12- and RS-485 interface	0.01 mm, 0.01 mm/min or mm/h
Impulse output	0.05/0.1/0.2 mm
Measurement intervals
Intensity output interval	1 minute
Query interval	1 minute … 60 minutes
Output delay
Real-time (RT)	< 1 minute
Non real-time (NRT)	5 minutes
Output data
Measurement output	Intensity RT, amount RT/NRT, amount NRT, amount total NRT, bucket content RT and NRT, temperature load cell
Status output	OTT Pluvio² L Status, Heating status (if present)
Interfaces
Digital interfaces	SDI-12 V1.3, RS-485 2- or 4-wire (SDI-12 protocol and ASCII)
Digital outputs (2/5 Hz)	Impulse: 0.05/0.1/0.2 mm (adjustable) Status: 0 … 120 impulses/min
USB	USB 2.0 (for service mode)
Electrical data
Power supply	5.5 … 28 VDC, typically 12 VDC
Current consumption	typ. 9.2 mA at 12 V (without heating)
Power consumption	≤ 110 mW (without heating)
Ring heating, optional
Power supply	12 … 28 VDC, typ. 12/24 VDC
Current consumption	Puvio² L 200: typ. 2.1 A; max. 2.2 A Puvio² L 400: typ. 4.2 A; max. 4.4 A
Power consumption
Pluvio² L 200:	max. 50 W at 24 VDC; max. 12.5 W at 12 VDC
Pluvio² L 400	max. 100 Watt at 24 VDC; max. 25 Watt at 12 VDC
Modes of operation	Disabled, continuously enabled, continuously enabled within a specified temperature range, US NWS standard (time-controlled), enabled in case of precipitation (adjustable after-run time)
Dimensions and weight
Pluvio² L 200 (Ø x h)	450 mm x 752 mm
Pluvio² L 400 (Ø x h)	450 mm x 677 mm
Pedestal (Ø)	4”
Weight (bucket empty)	16 kg / 16.6 kg
Material
Base plate	Stainless steel / aluminium
Collecting bucket	Polyethylene
Bucket support, pipe housing	ASA, UV-resistant
Environmental conditions
Temperature, in operation	– 40 … +60 °C
Temperature, storage	-50 … +70 °C
Relative humidity	0 … 100 % (non-condensing)
Protection
Housing (closed)	IP65
Housing (open)	IP63
Load cell	IP68, resistant to salt fog
Standards	EMV: 2004/108/EG; EN 61326-1:2013