Canada-based renewable energy company TransAlta Corp has purchase 20 Vindicator Laser Wind Sensor (LWS) units, developed by US-based Catch the Wind.

Financial terms of the sales agreement were not disclosed however TransAlta Corp has an option to purchase additional units for wind turbine control.

TransAlta would begin the installation in July 2011 on a wind farm.

The Vindicator LWS is a next generation wind sensor for utility-scale wind turbines which determines wind speed and direction up to 300 meters in front of the turbine.