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Compare 2 Axis Anemometers

Gill offers two ranges of 2-axis anemometers (sometimes referred to as 2D anemometers): WindSonic and WindObserver.

WindSonic Range – cost effective, high performance 2-axis ultrasonic anemometers

The WindSonic range consists of high quality, multi-purpose anemometers. The range is suitable for most applications, is available in a range of materials for different environments and with a range of output formats. The product incorporates a reflector design and is available with or without heating.

WindObserver Range – precision 2-axis ultrasonic anemometers for demanding applications

The WindObserver range is based on an open head design. This allows for higher wind speed measurement and greater accuracy when the angle of wind flow is increased. With higher output rates, a range of output formats and a robust stainless steel design, the range is popular for specialist applications such as marine, airport and wind power generation.


Wind speedmodels up to 75m/s0-60m/smodels up to 90m/s0-75m/s
Output rateup to 4Hz up to 4Hzup to 10Hz WindObserver 65 up to 4 Hz WindObserver 70+up to 4Hz
Digital outputRS232, RS422, RS485, SDI-12, NMEARS232, RS422, RS485, NMEARS422, RS485, NMEARS232, RS422, RS485, NMEA (all via PCI)
Analogue outputs V, mAV, mAV, mANo
Measurements status code outputYesYesYesYes
Enhanced calibration availableYesYesYesNo
Low power modeYes (SDI-12 model only)NoNoNo
HeatingNoup to 100wup to 168wNo
Constructionpolycarbonate aluminiumstainless steelstainless steel
Approvals/ acceptanceCAA/FAA, Lloyds RegisterIECEx/ ATEX
Weight0.5kg0.9kgfrom 1.4kgfrom 1.9kg