Vaisala Present Weather Detectors PWD22 and PWD52

Most of the problems weather causes to our road transportation system are triggered by precipitation. Accurately detecting precipitation is critical to proper decision making. The Vaisala Present Weather Detector PWD12 reports the type of precipitation falling, and provides a short range visibility measurement.
    Overview
     

     Overview

    		 
      • 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
       

       Technical Specifications

      		 

      Visibility (MOR) measurement

      ​
      		 ​PWD22: ​
      ​
      		 ​Measurement range ​
      10 ... 20 000 m (32 ft ... 12 miles)
      ​
      		 ​PWD52: ​
      ​
      		 ​Measurement range ​10 ... 35 000 m (32 ft ... 21 miles)

      Present weather

      ​
      		 ​PWD22/52: ​
      ​
      		 ​     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

       

      Temperature
      Humidity

      -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

      Mechanics

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

      Weight

      3 kg (6.61 lb)

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

       
       
      Related Services
      • Repair Services 
        • Vaisala repair services include fault tracing and repair or replacement of failed components, as well as final testing to ensure your equipment is functioning properly. Repairs can be carried out on site or at one of our service centers.
      • Spare Parts 
        • Get rapid access to the spare parts you need to maximize the uptime of your equipment and ensure reliable and accurate operation. In addition to standard spare part delivery, we also offer an express service where parts are shipped within one business day.
      • 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. With Vaisala’s extended warranty, you get free repair or replacement for five years.
      Documents