Lufft WS500-UMB - Measuring Range; Accuracy

Operating Manual Compact Weather Station
36 G. Lufft Mess- und Regeltechnik GmbH, Fellbach, Germany
13.1 Measuring Range / Accuracy
13.1.1 Air temperature
Measurement process: NTC
Measuring range: -50°C ... +60°C
Resolution: 0.1°C(-20°C...+50°C), otherwise 0.2°C
Sensor accuracy: +/- 0.2°C (-20°C ... +50°C), otherwise +/-0.5°C (>-30°C)
Sampling rate: 1 minute
Units: °C; °F
13.1.2 Humidity
Measurement process: Capacitive
Measuring range: 0 ... 100% RH
Resolution: 0.1% RH
Accuracy: +/- 2% RH
Sampling rate: 1 minute
Units: % RH; g/m³; g/kg
13.1.3 Dewpoint Temperature
Measurement process: Passive, calculated from temperature and humidity
Measuring range: -50°C ... +60°C
Resolution: 0.1°C
Accuracy: Computed +/- 0.7°C
Units: °C; °F
13.1.4 Air Pressure
Measurement process: MEMS sensor - capacitive
Measuring range: 300 ... 1200hPa
Resolution: 0.1hPa
Accuracy: +/- 1.5hPa
Sampling rate: 1 minute
Unit: hPa
13.1.5 Wind Speed
Measurement process: Ultrasound
Measuring range: 0 … 60m/s
Resolution: 0.1m/s
Accuracy: ±0.3 m/s or ±3% (0...35 m/s)
±5% (>35m/s) RMSE
Response threshold: 0.3 m/s
Sampling rate: 10 seconds / 1 second with restrictions
Units: m/s; km/h; mph; kts
13.1.6 Wind Direction
Measurement process: Ultrasound
Measuring range: 0 – 359.9°
Resolution: 0.1°
Accuracy: < 3° RMSE from 1.0 m/s
Response threshold: 0.3 m/s
Sampling rate: 10 seconds / 1 second with restrictions
13.1.7 Precipitation
Measurement process: Radar sensor
Measuring range (drop size): 0.3 mm ... 5.0 mm
Liquid precipitation resolution: 0.01 mm
Precipitation types: Rain, snow
Repeatability: Typically > 90%
Response threshold: 0.01 mm
Sampling rate: Event-dependent on reaching response threshold