WS501-UMB

Compact all-in-one weather sensor for measurement of temperature, relative humidity, air pressure, wind direction and wind speed.

Enquire about this product
WS501 UMB

Key features

  • Measuring wind direction and speed insusceptibly to bird nesting thanks to roofed construction

  • All-in-one housing concept of a compact weather sensor combining 5 measurement parameters in one housing with only one cable connection

  • Built-in data pre-processing, universal interfaces and selectable output protocols

  • Maintenance-free operation – no moving parts that can wear out

  • Compatible with many commercially available Met/HydroMet data loggers and PLS systems thanks to an open communication protocol

  • 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

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 and wind speed. One external temperature or rain sensor is connectable.

Technical specification

General

Dimensions Ø approx. 150 mm, height approx. 287 mm
Weight Approx. 1.2 kg
Interface RS485, 2 - wire, half - duplex
Power supply 11…32 VDC
Power supply 5…11 VDC (electronics with limited precision of measurements)
Power supply 24 VDC +/- 10% (heater)
Power consumption 20 VA (heater)
Operating temperature -50...60 °C (with heater)
Operating rel. humidity 0...100 % RH
Cable length 10 m
Protection level housing IP66
Standards/Regulations Compliant to IEC 61724-1:2017
Mast mounting suitable for Mast diameter 60 - 76 mm

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

Radiation

Response time (95%) < 18 s
Non-stability (change/year) < 1 %
Non-linearity (0 to 1,000W/m²) < 1 %
Directional error (at 80° with 1,000W/m²) < 20 W/m²
Temperature dependence of sensitivity < 5 % (10... +40 °C)
Tilt error (at 1000W/m²) < 1 %
Spectral range 300...2800 nm
Measuring range 2000 W/m²

Compass

Measurement range 0 ... 359°
Resolution 1.0°
Accuracy +/-10°
Sampling rate 5 minutes