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WS502-UMB Smart Weather Sensor

Make:   Lufft        Model:  WS-502 UMB
✅ Wind detection with birdproof construction. Compact all-in-one weather sensor, low power, heater, aspirated radiation shield, maintenance-free operation, open communication protocol.
✅ Measurand: Temperature, relative humidity, air pressure, wind direction, wind speed, radiation
✅ Principle Used: Ultrasonic/Wind, NTC/T, Capacitive/RH, MEMS capacitive/Pressure, Lufft Pyranometer/Radiation
✅ Signal Output: RS485 with supported protocols UMB-Binary, UMB-ASCII, Modbus-RTU, Modbus-ASCII, XDR and SDI-12
✅ Article number: 8375.U10
                
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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, wind direction, wind speed and radiation. One external temperature or rain sensor is connectable.

Advantages of the Smart Weather Sensor WS502

  • Measuring wind direction and speed insusceptibly to bird nesting thanks to roofed construction
  • All-in-one housing concept of a compact weather sensor combining 6 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

Application of the Smart Weather Sensor WS502:

The robust and maintenance-free smart weather sensor WS502 is designed for professional meteorological applications in all climate zones. It delivers reliable data, even in extreme ambient conditions.

  • Weather observation for road and traffic control systems
  • Automatic weather station / Automatic weather sensor (AWS)
  • PV-Monitoring / Solar Monitoring on photovoltaic farms
  • Hydro-meteorological stations
  • Weather observation for building automation
  • Weather stations at airports, marinas and onboard ships
  • Integration into various other systems/solutions, where environmental data is needed…
Make

Lufft

Model

WS502

General

:-

Dimensions

Ø approx. 150 mm, height approx. 317 mm

Weight

Approx. 1.5 kg

Interface

RS485, 2 – wire, half – duplex

Power Supply

11…32 VDC, 5…11 VDC (electronics with limited precision of measurements), 24 VDC +/- 10% (heater)

Power Consumption

20 VA (heater)

Operating Temperature

-50…60°C (with heater)

Operating Rel. Humidity

0…100% RH

Protection Level Housing

IP66

Standards/Regulations

Compliant to IEC 61724-1:2017

Mast Mounting Suitable For

Mast diameter 60 – 76 mm

Radiation

Unit: W/m²
Accuracy: 5 %
Response time (95%): < 1 s
Non-stability(change/year): ±1 %
Non-linearity (0 to 1000 W/m²): ±1 %
Directional error (at 80° with 1000 W/m²): ±20 W/m²
Temperature dependence of sensitivity: ±5 % (-10 to +40 °C)
Tilt error (at 1000 W/m²): ±1 %
Spectral range: 300…1100 nm
Measuring range: 1400 W/m²

Air 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)

Wind Direction

Principle: Ultrasonic
Measuring range: 0 … 359.9 °
Unit: °
Accuracy: < 3 ° RMSE > 1.0 m/s
Resolution: 0.1

Wind Speed

Principle: Ultrasonic
Measuring range: 0 … 75 m/s
Unit: m/s
Accuracy: ±0.3 m/s or ±3 % (0…35 m/s) ±5 % (>35 m/s) RMS
Resolution: 0.1 m/s