Forward Scatter FD70 Series

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.

FD70 Series product models:

FD71 for visibility
FD71P for visibility, present weather, and precipitation

Datasheet

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Vaisala FD70 Forward Scatter Series

Key Benefits

Best-in-class 3-in-1 performance: visibility, present weather, and precipitation quantification

Accurate visibility measurement with proven calibration traceability and a range of up to 100 km

Significant enhancement of drizzle, freezing rain, hail, and ice pellet identification

Overview

Vaisala Forward Scatter FD70 Series combines forward scatter and optical disdrometer technologies. The novel utilization 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. The particle size and fall speed distributions provide additional information, enhancing precipitation type identification. The receiver measures the forward scattered light at an angle of 42° with a very high sampling rate and powerful signal processing.