WS502-UMB
Compact all-in-one weather sensor for measurement of temperature, relative humidity, air pressure, wind direction and wind speed.
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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
| 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 |
| 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 |
| Principle | NTC |
| Measuring range | -50 ... 60 °C |
| Unit | °C |
| Accuracy | ±0.2 °C (-20...50 °C), otherwise ±0.5 °C (>-30 °C) |
| Principle | Capacitive |
| Measuring range | 0 ... 100 % RH |
| Unit | % RH |
| Accuracy | ±2 % RH |
| Principle | MEMS capacitive |
| Measuring range | 300 ... 1200 hPa |
| Unit | hPa |
| Accuracy | ±0.5 hPa (0...40 °C) |
| Principle | Ultrasonic |
| Measuring range | 0 ... 359.9 ° |
| Unit | ° |
| Accuracy | < 3 ° RMSE > 1.0 m/s |
| Resolution | 0.1 |
| 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 |
