The VPF-700 Series is comprised of three models:

• VPF-710 measures visibility and fog density
• VPF-730 measures visibility, fog density, precipitation type, rainfall rate and snowfall rate
• VPF-750 measures visibility, fog density, precipitation (including freezing precipitation), distinguishes haze, smoke from mist

Visibility measurements are reported as forward scatter Extinction Coefficient (EXCO) or Meteorological Optical Range (MOR) in the range of 10m to 75 km. The features and accuracy of the VPF-700 series sensor ensure it complies with ICAO and WMO specifications for aviation use including Runway Visual Range systems.

All VPF-700 series sensors are designed to be easy to use, with the ASCII text data message transmitted at user defined time periods or in response to a polled request. The standard data message provides EXCO or MOR. An optional interface to the ALS-2 Ambient Light Sensor simplifies use in aviation applications where RVR information is required. The ALS-2 Ambient Light Sensor data  is  appended  to  the standard sensor data message simplifying both the installation and data processing.

The VPF-700 series sensors have several features that reduce maintenance requirements to a minimum whilst ensuring accurate and reliable operation. These features include window contamination monitoring which automatically corrects the output data and provides two stage warnings allowing maintenance to be performed as efficiently as possible. Calibration checks and recalibration are simple and quickly accomplished in the field by a single person.

FEATURES

• WMO TABLE 4680 & METAR OUTPUTS
• INSTANTANEOUS AND AVERAGED VISIBILITY OUTPUTS
• ATMOSPHERIC EXTINCTION COEFFICIENT (EXCO)
• EASY INTEGRATION OF ALS-2 AMBIENT LIGHT SENSOR
• 3 YEARS WARRANTY
• 10 M TO 75 KM VISIBILITY RANGE
• PRECIPITATION TYPE IDENTIFIED
• ACCURATE
• HIGH RELIABILITY, LOW MAINTENANCE
• WATER EQUIVALENT VOLUME FOR SNOW, SLEET AND HAIL MEASURED