Vaisala Present Weather Detectors PWD22 and PWD52


Present Weather Detectors and Sensors PWD22 and PWD52 for current visibility and precipitation at weather-critical locations
      • Accurate, traceable measurement of prevailing visibility
      • Detects precipitation type
      • Measures the intensity and accumulation of precipitation
      • Estimates snow accumulation
      • Indicates the cause of reduced visibility
      • Robust and dependable
      • Weather-proof design reduces need for maintenance
      • Easy to install, easy to integrate
      Technical Specifications

      Visibility (MOR) measurement


      ​Measurement range
      10 ... 20 000 m (32 ft ... 12 miles)


      ​Measurement range ​10 ... 35 000 m (32 ft ... 21 miles)

      Present weather


      ​     Identifies ​7 different types of precipitation (rain, freezing rain, drizzle, freezing drizzle, mixed rain/snow, snow, ice pellets)
      Fog, mist, haze (smoke, sand) or clear.

      ​    Reports
      WMO 4680 (SYNOP), 4678 (METAR) and NWS code tables
      49 different codes supported from WMO 4680 code table

      Operating environment



      -40...+60 °C
      0...100 %RH

      Inputs and outputs

      ​Outputs ​RS232, RS485, analog current, relay control

      ​Operating voltage ​12 VDC ... 50 VDC (electronics)
      24 VAC or 24 VDC for heater option

      ​Power consumption

      ​   PWD22 and PWD52 ​6 W


      ​Dimensions 222 mm (h) x 695 mm (w) x 432 mm (d)
      (8.73” (h) x 27.35 “ (w) x 16.99”(d))


      3 kg (6.61 lb)

      For complete specifications, please see the brochure or user guide in "Documents".

      Related Services
      • Warranty 
      • All Vaisala products and services are covered by a 12-month warranty as standard, with selected products covered for up to 24 months. During this period you benefit from free repair or replacement of faulty equipment.
      • Warranty 
      • Service Center Repair  
      • If your instrument requires repair.