• Portable, Automated Weather Station

Portable, Automated Weather Station

with Low Power Consumption and Visibility Sensor

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The LP-AWS is an advanced, portable, Low Power Automated Weather Station built around the OWI-650 Low Power Weather Identifier and Visibility Sensor (LP-WIVIS)

The low power requirements of the OWI- 650 make it well suited for portable battery and solar powered applications. The system has been designed from the ground up for fast setup anywhere.

The OWI-650 measures visibility and detects rain, snow, drizzle, freezing and mixed precipitation conditions The OWI-650 is more than just a sensor. It is a system. No separate data acquisition system is required to add optional meteorological sensors. Implementing a portable automated weather station with weather identification and visibility sensor capability has never been easier or as cost effective.

The fully automated OWI-650 provides accurate visibility, present weather and precipitation measurements. Typical systems include other optional meteorological sensors including wind, pressure, and temperature/ humidity sensors.

OSi's patented environmentally adaptive weather identification algorithms use artificial-intelligence technology derived from over 25 years experience and over 200 million field hours of real-world data from OSi sensors installed around the world. The result is the most advanced / easily deployable Automated Weather Station with optical weather identifier and visibility sensor available.

  • Easy installation
  • Portable system which reports present weather and visibility
  • Intelligent algorithms based on over 200 million hours of OSi sensor field data
  • Solar, Battery or AC Powered
  • Small size, light weight, rugged design
  • Other sensors easily added
  • Data radio options available
  • Separate data acquisition system not required
  • Design for unattended operation
  • Virtually no maintenance required
  • Built-in self diagnostics & testing


  • Optional Sensors Contact OSi
  • PSB-650 AC-powered junction box
  • PSB-650S Power Junction Box with Solar Kit
  • PSB-650B Power Junction Box with Rechargeable Battery
  • TRI-650 AWS Tripod
  • Data Radio Contact OSi
  • QCS-650 QwikCollect™ software


MeasurementTechnique Scintillation with optical forward scatter and optional acoustic*
Data Reporting Update Rate 1 minute
Present Weather Codes Reported More than 50 NWS and WMO codes
Present Weather Type Identification Rain, freezing rain, snow, freezing drizzle, mist, mixed, fog, haze, clear
Snow / Rain Accumulation .001 to 999.999 mm
Snow / Rain Measurement Resolution 0.001 mm
Rain Dynamic Range 0.1 to 3000 mm/hr
Rain Measurement Accuracy 5% accumulation
Snow Dynamic Range0.01 to 300 mm/hr
Snow Measurement Accuracy 10% accumulation
Visibility / RVR Dynamic Range (metric and ANSI units & extended ranges available)0.01 to 10+ km
0.001 to 7.1 miles
Visibility Contrast Threshold 5%
Ambient Light Dynamic Measurement Range 0 to 9,990 candles / m2
Power Requirements 
Electronics3.6 vdc @ 375 mA
Heaters 12 vdc @ 600 mA
Transient Protection All power & signal lines fully protected
Signal Output RS-232 ASCII, simple polled protocol
Temperature -40° to 122° F (-40° to 50° C)
Humidity0 to 100%
Precipitation / Dust NEMA 4 type protection
DSP-WIVIS Sensor Size21 x 8 x 4 inches (53 x 20 x 10 cm)
DSP-WIVIS Sensor Weight 4.25 lbs. (1.9 kg)
Cable Length 12 ft. (3.7 meter)


Ordering Informations
Cat. No.Description
OWI-650-DR DC powered, RS-232 serial I/O – specify Metric or ANSI