Weighing Rain Gauge

Weighing Rain Gauge



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Description

Weighing Rain Gauge

All-weather, high accuracy rain gauge for continuous data collection

The weighing rain gauge 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  employs a high-precision load cell and algorithms that compensate for wind, temperature, and evaporation, ensuring the highest accuracy precipitation measurements over time.

  • Cumulative precipitation, precipitation intensity, bucket content in real time and non real time
  • Weighing principle
  • All-weather precipitation gauge without moving parts according to WMO guide line No. 8
  • SDI-12 / RS-485, pulse

Feature

  • 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

Spesification

Types of precipitation liquid, solid, and mixed
Collecting area 200 cm² and 400 cm²
Collection volume 1500 mm/m² and 750 mm/m²
Measuring range 200 cm²  
Intensity RT / measuring interval 1 minute 12.00 … 1800.00 mm/h, 0.20 … 30 mm/min
Amount RT/NRT, amount NRT, amount total NRT 0.10 … 500.00 mm
Bucket content, RT and NRT 20.00 … 1600.00 mm
Measuring range 400 cm²  
Intensity RT / measuring interval 1 minute 6.00 …1800.00 mm/h, 0.10 … 30 mm/min
Amount RT/NRT, amount NRT, amount total NRT 0.10 … 500.00 mm
Bucket content, RT and NRT 20.00 … 850.00 mm
Accuracy (at – 25 …+45 °C)  
Amount, absolute (60 minutes collection time) ± 0.05 mm
Intensity ± 0.1 mm/min or ± 6 mm/h
Resolution  
Impulse output 0.1 mm
SDI-12 and RS-485 0.01 mm/min, 0.01 mm/min or mm/h
Times  
Intensity output interval 1 minute
Output delay RT 20 seconds; NRT 5 minutes
Query interval 6 seconds …. 60 minutes
Interfaces  
USB configuration/service mode and firmware update
Serial interfaces SDI-12 or RS 485
Digital outputs impulse 0.1 mm (configurable) and status (0 … 120 impulses/min; configurable 5 or 2Hz )
Measurement output intensity RT; amount RT/NRT, amount NRT, amount total NRT, bucket content RT and NRT; temperature of load cell, status Pluvio², status heating (if present)
Electrical and mechanical data  
Sensor element sealed load cell
Power supply 10 … 28 VDC
Power/current consumption typ. 12 mA at 12 V
Ring heating, optional Pluvio² 200: 24 VDC / 50 Watt
Pluvio² 400: 24 VDC / 100 Watt
Dimensions (Ø x h)  
OTT Pluvio² 200 / 400 450 mm x 740 mm / 450 mm x 660 mm
Pedestal (Ø) 110-120 mm ( 4 ‘)
Weight (bucket empty) 15 kg
Material for base plate / bucket / pipe housing stainless steel, aluminium / polyethylene / ASA, UV- resistant
Environmental conditions  
Temperature, in operation -40 … +60 °C
Temperature, storage -50 … +70 °C
Relative humidity 0 … 100% (non-condensed)
Protection  
Housing IP54, resistant to salt fog
Load cell / electronics IP67 / IP64
EMC EN 61000-4-2/4/5/6, Level 5 (4 kV) EM/EMI EN 61000-4-3, CE conformity
RT = real- time; NRT = non real-time ; units can be configured in mm or in (inch) and °C or °F