temperature Principle: NTC Range: –50 … 60 °C Accuracy: ±0.2°C (–20°C … +50°C), ±0.5°C (< –30°C) Relative humidity Principle: Capacitor Range: 0 … 100% RH Accuracy: ±2% RH Rainfall Resolution: 0.01mm Range: Raindrop size 0.3 … 5mm Accuracy: >90% Rain type: rain, snow Total radiation Response time (95%): < 1s Wavelength: 300 to 1100nm Range: 0 to 1400 W/m² Accuracy: 5% Air pressure Principle: MEMS capacitor Range: 300 … 1200hPa Accuracy: ±0.5hPa (0...+40°C) Wind speed Principle: Ultrasonic Range: 0 … 75m/s Accuracy: ±0.3m/s or 3% (0 … 35 m/s), ±5% (> 35m/s) RMS wind direction Principle: Ultrasonic Range: 0 … 359.9° Accuracy: < 3°, RMSE >1.0m/s Technical parameters Specifications: Øabout 150mm, height 317mm Weight: about 1.5kg Heating power: 20VA, 24VDC Protection level: IP66 Data interface: 2-wire RS485, half-duplex Working voltage: 4...32VDC Working humidity: 0 … 100% Operating temperature: –50 … 60 °C appendix Anti-surge 24V/4A power supply UMB protocol converter ISOCON-UMB Digital-to-analog converter DACON8-UMB External temperature sensor WT1 20m cable Place of origin German Lufft | ![]() |