Skip to content

WindObserver soars above the South Coast’s most historic harbour

Spinnaker Tower
The Emirates Spinnaker Tower is the tallest viewing structure in the UK outside of London.

The Emirates Spinnaker Tower in Portsmouth harbour is the tallest and most iconic viewing structure on the UK’s South Coast, reaching a total height of 170m (547ft) and weighing 30,000 tonnes! Presenting spectacular views of the surrounding area, the tower also features Europe’s largest glass floor measuring 7.79m² and 6cm thick.

Hosting hundreds of spectators per day, on each of its three viewing decks, the safety of the tower and its visitors is paramount and Gill’s WindObserver ultrasonic anemometer is used to provide crucial wind measurement data.

The tower is located on the coastline and subjected to high salinity and fierce weather conditions with wind speeds of up to 30 m/s. At a height of 115 metres, in strong winds the tower flexes by up to 150mm.

gil windobsever on the spinnaker tower
The WindObserver provides information on wind conditions.

The robust stainless steel WindObserver provides operators with real-time and highly accurate information on wind conditions allowing them to make decisions about the health and safety issues affecting maintenance and whether to close the tower to customers who can visit and abseil from the 110m viewing deck! If the wind speeds are too high, operators can close the tower to visitors.

The WindObserver is one of the most popular ultrasonic anemometers in the world and has been installed on hundreds of iconic building control applications due its range of options, solid-state construction with no moving parts, easy installation and excellent reliability in demanding weather conditions. WindObserver is ideally suited to low maintenance and restricted access applications and with a wind speed measurement range of up to 90m/s it can record the highest wind speeds from cyclonic regions around the world.

For more information on the WindObserver and how it can be used in a variety of industries please contact us.



WindUltra, Gill's latest high performance wind sensors, are proving to be market leading on a number of fronts:


MaxiMet now has extended performance in freezing conditions due to the new heated option.


Fantastic achievement by Saildrone to gain a Guiness World Record for the highest wind speed recorded by a USV. We're very proud to say they chose a Gill WindMaster 3-axis ultrasonic anemometer as part of their Saildrone platform to measure wind speed and direction.


We are very pleased to announce that Gill Group has been shortlisted in the Supply Chain Excellence category of the Manufacturer MX Awards 2023!


Introducing WindUltra – a step forward in compact, high quality, ultrasonic wind sensing


Introducing the MaxiMet Marine weather station from Gill Instruments. Accurate and reliable data for a range of marine applications.


New Gill MaxiMet compact weather stations brochure


Dust storms have an enormous impact both locally but also travel across continents. Many originate from the empty quarter desert stretching across the Arabian peninsula, the world’s largest sand desert.


The Gill team have had a great time at Meteorological Technology World Expo, meeting up with our distributors and partners.…


One of Saildrone's unmanned surface vehicles (USVs) is collecting critical ocean data from within Hurricane Fiona (Category 4 storm) -…