VPF-710 Visibility Sensor Datasheet Premium quality sensor for the measurement of visibility in the most demanding applications Reliable operation in all weather conditions Compact forward scatter design simplifies installation and system integration, whilst providing accurate measurements KEY FEATURES & BENEFITS 1 Reliable measurement in all weather conditions 9 Highly corrosion resistant hard coat anodised finish 9 Window contamination monitoring and compensation 9 Unaffected by obstacle warning lights 9 Easy integration of Biral ALS-2 Ambient Light Sensor 9 Mains or DC powered 9 10m to 99.99Km measurement range 9 5 Years Warranty The VPF-710 Visibility sensor provides high quality visibility measurement in a compact and robust package. The open design of the sensor head allows the free passage of air ensuring the visibility measurement is as accurate as possible in all conditions. Other features of the design ensure reliable results in all precipitation types as well as smoke and dust. Visibility Measurement The measurement of visibility by forward scatter as used by the VPF-710 is now widely accepted and seen as having significant advantages over more traditional techniques such as the use of transmissometers or backscatter sensors. Backscatter sensors share the VPF-710's advantage of being compact however the backscatter signal is strongly dependent on the type of obstruction to vision resulting in poor accuracy and limited upper range. Transmissometers were once considered the gold standard of visibility measurement due to their advantage of direct visibility measurement, however the limited measurement range, high cost of acquisition, large size and significant maintenance costs have resulted in their use being limited to a few specialist applications. The VPF-710 by contrast is compact, requires little maintenance and has a visibility range of 10m to 75km, whilst its measurement performance has been proven to be comparable to that of a transmissometer. The calibration of the VPF sensor family was undertaken in accordance with the recommendations of ICAO 9328 and is traceable to a national weather service transmissometer. Visibility measurements are reported as forward scatter Extinction Coefficient (EXCO) or Meteorological Optical Range (MOR) in the range of 10m to 99.99km. The features and

accuracy of the VPF-710 ensure it complies with ICAO and WMO specifications for aviation use including Runway Visual Range systems. turbine whilst the electro-optic design ensures that not even flashing IR lights disturb the visibility measurement. The design features of the VPF-710 make it equally applicable to many other applications including national weather service networks and research applications. Our sensors are often installed in challenging environments, such as offshore platforms, where meteorological information is essential for operational safety. The sensor's physical design is optimised...

For a detailed explanation of the configuration options please refer to the table below. 71 - VPF-710 Sensor Power Supply: 012 - 12 Vdc 024 - 24 Vdc 120 - 120 Vac 240 - 240 Vac Hood Heating: HV -With heating NH -Without heating Data Output: D -RS232 Serial Output E -RS422/RS485 Serial Output Self-Test and Monitoring: S - Standard A - Advanced Weather Station Module: T -Without Weather Station Module W - With Weather Station Module Ambient Light Sensor Interface (ALS-2): NA -Without ALS-2 Interface WA -With ALS-2 Interface Cable Length: 06 -6m power and data cables with connectors 06G - 6m power...

Visibility Measurement Operating temperature Certification & Compliance_ CE Certified EMC compliance with EN61326-1997, 1998, 2001 RoHS and WEEE compliant Output rate (seconds) Power Requirements Sensor Power Additional Features Window heaters Self-test capability Included with Sensor_ The sensor is delivered in sturdy recyclable foam filled packaging with: - Pole mounting kit (1 x U-bolt) - 6m power and data cable - User manual and calibration certificates Accessories - Optional Specifications are subject to review and change without notice. E&OE. © Biral - Bristol Industrial & Research Associates...