NRG Systems offers three lines of turbine control sensors to meet the needs of any wind farm. The IceFree Hybrid™ XT anemometer and vane deliver better heating performance in all weather conditions and longer bearing life.  Both the unheated and the IceFree Ultrasonic Wind Sensors feature instantaneous and accurate measurement with a compact enclosure and no moving parts for minimal maintenance.  The Classic Turbine Control Sensors (the #40H anemometer and #20H vane) provide accurate and cost-effective measurements of wind speed and direction in non-icing conditions.