Datasheet

Forward Scatter FD70 Series

FD70 Series is the seventh generation of Vaisala visibility and present weather sensors. It is designed based on more than 30 years of forward scatter technology development experience. This technology innovation sets a new standard in precipitation identification, quantification, and visibility determination accuracy.

The novel use of a single thin light sheet instead of the conventional light cone results in a high detection sensitivity. This enables a scatter-properties analysis of each single particle and allows the detection of even the smallest drizzle droplets.

FD70 Software Information:
Current software version in production: v2.1. For software field update and release notes, please contact Vaisala Technical Support.

Features

Reports visibility up to 100 km (62 mi)

Disdrometer features: droplet size distribution, reflectivity

Reports precipitation type, intensity, and accumulation

Exceptional detection sensitivity

Optimal forward scatter angle 42°

Look-down geometry to minimize measurement disturbances

Ethernet connectivity and sophisticated software security features

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Key Benefits

Replace up to 4 separate sensors

• Rain gauge
• Disdrometer
• Visibility and present weather sensor
• Freezing rain sensor

Outstanding weather type identification

• Reliable identification of even the most challenging precipitation types such as freezing rain, hail and ice pellets
• Excellent precipitation accumulation performance
• Reports droplet size distribution and reflectivity
• Extensive reporting of METAR, SYNOP and NWS weather codes

Minimized disturbances for constant performance

• Window contamination compensation
• Look-down geometry to protect from wind driven contaminants and light
• Insect filtering algorithm for flying insects
• Nearly maintenance free

Accurate response to changing weather

• Detects onset of precipitation right from the first droplets
• Fast reaction to changes in MOR (range: 1 m... 100 km)
• Reliable RVR in all operating conditions
• Visibility traceable back to reference transmissometer

High data availability for 24/7 operations

• Advanced self diagnostics
• Remote monitoring
• Software security features
• Easy to use graphical user interface

Possible problems can be solved quickly

• Modular design of the product – fast repair times
• Good availability of spare parts
• Dedicated technical support organisation
• Calibration and repair services