OTT WAD 200/314 – Weighing Rain Gauge

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Imagen de: OTT WAD 200/314 – Weighing Rain Gauge

The OTT WAD 200/314 combines the advantages of a tipping and weighing system and is specially designed for the use in subtropical and tropical climates. The highly sensitive measuring principle of the precipitation meter meets the requirements of the WMO guidelines and delivers accurate measured values in real time for both quantity and intensity of liquid precipitation in the range of 0.001 to 720 mm/h.
The rain gauge has a low power consumption and is an accurate measuring instrument even under extreme weather conditions. A usually prescribed annual calibration can be carried out with the aid of a reference weight and is therefore more accurate than the usual calibration procedure using water volume.

General Data
Sensor type Weighing precipitation gauge
Sensor element Hermetic sealed load cell
Precipitation Types Liquid
Collecting area 200 cm² / 314 cm²
Capacity 0.2 mm bucket, self-emptying
Measuring range
Amount Without limitation (0.005 … ∞ mm)
Intensity 0 … 10 mm/min resp. 6 mm/h
Amount 0.001 mm
Intensity 0.001 mm/min resp. 0.001 mm/h
Amount ±0.1 mm or ±2 %
Intensity ±0.1 mm/min resp.; ±6 mm/h oder ±2 %
Electrical parameters
Electronics 9.8 to 32VDC / 160 mW (SDI-12 & pulse output)
USB Configuration / Service-Mode
Serial interface SDI-12 or RS485 2-wire
Baud rate 1200 (SDI-12); 2400 to 19200 baud (RS-485)
Pulse output 0.01 / 0.1 / 0.2 / 0.5 / 1.0 mm
Status output Rain yes/no
Analogue output 0/4 … 20 mA or 0 … 2/5 V
Data output
Real time (RT) Intensity & cumulative precipitation
Status Operational mode, hardware
Output interval 1 min (intensity); 1 to 60 minutes
Output formats SDI-12 V1.3: metric & imperial units; RS-485 (galvanic isolated): ASCII.TXT and MODBUS
Dimensions and Weight
Dimension (Ø x h) WAD 200: 292 x 190 mm; WAD 314: 311 x 256 mm
Weight WAD 200: ca 2,5 kg; WAD 314: ca. 4,0 kg
Ring, funnel, plate Aluminum alloy
Load cell Stainless steel
Bucket Monolithic
Mounting/Installation Ø 2“/ 60mm
Environmental conditions
Operating temperature 0 … +70 °C
Storing temperature -50 … +70 °C
Ambient relative humidity 0 … 100% RH
Protection class Load cell: IP 67 / instrument: IP 64
Wind Speed Survival 60 m/s
EMC/EMI and Norms
Overvoltage EN 61000-4-2/-4/-5/-6/-11 Level 5 (4 kV), integrated for power & interface cables
EMC/EMI EN 61000-4-3, CE conform
RoHS 2011/65/EU
Norms WMO-No 8, VDI 3786 Bl. 7
Imagen de OTT WAD 200/314 – Weighing Rain Gauge
Imagen de OTT WAD 200/314 – Weighing Rain Gauge
Imagen de OTT WAD 200/314 – Weighing Rain Gauge
Imagen de OTT WAD 200/314 – Weighing Rain Gauge


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