- Model WS302-UMB - Smart Weather Sensor

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Compact all-in-one weather sensor for measurement of temperature, relative humidity, air pressure and radiation. From the WS product family of professional intelligent measurement transducers with digital interface for environmental applications. Integrated design with ventilated radiation protection for measuring: Air temperature, relative humidity, air pressure and radiation. One external temperature or rain sensor is connectable.

  • Parameters measured: Temperature, relative humidity, air pressure, radiation
  • Measurement technology: NTC/T, Capacitive/RH, MEMS capacitive/Pressure, Lufft Pyranometer/Radiation
  • Product highlights: Compact all-in-one weather sensor, low power, heater, aspirated radiation shield, maintenance-free operation, open communication protocol
  • Interfaces: RS485 with supported protocols UMB-Binary, UMB-ASCII, Modbus-RTU, Modbus-ASCII, XDR and optional SDI-12

Advantages of the Smart Weather Sensor WS302
  • All-in-one housing concept of a compact weather sensor combining several measurement parameters in one housing with only one cable connection
  • Built-in data pre-processing, universal interfaces and selectable output protocols
  • Compatible with many commercially available Met/HydroMet dataloggers and PLS systems thanks to an open communication protocol
  • Maintenance-free operation – no moving parts that can wear out
  • Suitable for all climate zones; also for solar-powered automatic meteorological stations
  • Ventilated temperature and humidity measurement according to WMO guidelines
  • Integrated heater that can be switched on if there is danger of frost

Examples of use of the Smart Weather Sensor WS302

The robust and maintenance-free smart weather sensor WS302 is designed for professional meteorological applications in all climate zones. It delivers reliable data, even in extreme ambient conditions.

Examples of use:

  • PV-Monitoring / Solar Monitoring on photovoltaic farms
  • Automatic weather station / Automatic weather sensor (AWS)
  • Hydro-meteorological stations
  • Meteorological reference stations
  • Integration into various other systems/solutions, where these measurement parameters are needed...

General:

  • Weight: Approx. 1.3kg
  • Interface: RS485, 2-wire, half-duplex
  • Power supply: 4...32 VDC
  • Operating temperature: -50...60°C
  • Operating rel. humidity: 0...100% RH
  • Heating: 20VA at 24 VDC
  • Dimensions: Ø approx. 150mm, height approx. 253mm
  • Protection level housing: IP66
  • Mast mounting suitable for: mast diameter 60 - 76mm

Radiation:

  • Unit: W/m²
  • Accuracy: 5%
  • Response time (95%): < 1 s
  • Spectral range: 300 to 1100 nm
  • Measuring range: 1400 W/m²

Temperature:

  • Principle: NTC
  • Measuring range: -50 ... 60 °C
  • Unit: °C
  • Accuracy: ±0.2°C (-20...50°C), otherwise ±0.5°C (>-30°C)

Relative humidity:

  • Principle: Capacitive
  • Measuring range: 0 ... 100 % RH
  • Unit: % RH
  • Accuracy: ±2% RH

Air pressure:

  • Principle: MEMS capacitive
  • Measuring range: 300 ... 1200 hPa
  • Unit: hPa
  • Accuracy: ±0.5 hPa (0...40°C)

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