Vaisala Present Weather Sensor FS11P

  • Measures visibility up to 75 km
  • Detects precipitation type and intensity
  • Well suited for synoptic and aeronautical applications
  • The most widely proven forward scatter RVR sensor, selected and used by FAA
  • Meets FAA and ICAO specifications for RVR and visibility measurement
  • The most widely proven present weather sensing technology
  • Minimal maintenance needs
  • Meets ICAO frangibility standards
Technical Specifications
Visibility (MOR) measurement
Measurement range (MOR) Accuracy 5...75,000 m with 1, 3 and 10-minute averaging
+10 % range 5...10,000 m
±20 % range 10,000...75,000 m
Present Weather
Identifies7 different types of precipitation (rain, freezing rain, drizzle, freezing drizzle, mixed rain/snow, snow, ice pellets)
Fog, mist, haze (smoke, sand) or clear
ReportsWMO 4680 (SYNOP), 4678 (METAR) and NWS code tables
49 different codes supported in the WMO 4680 code table
Operating environment
Operating temperature-40...+65 °C, optional -55...+65 °C
Operating humidity0...100 %RH
Wind speedUp to 60 m/s
Inputs and outputs
Main supply100/115/230 VAC +/-10 %, 50-60 Hz
Power consumption370 W maximum
Outputs(50 VA + 320 VA defrosting heaters) Serial line RS-232 or opto-isolated RS-485 (2-wire) or optional data modem
Separate RS-232 maintenance line
Dimensions2.8 m x 0.9 m x 1.0 m
Weight52 kg, incl. Frangible Mast FSFM250
MastFrangible and hinged composite-fiber mast
For complete specifications, please see the brochure in "Product Documentation".
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