The Walker 2090 uses a Solid State Ultrasonic Wind Speed & Direction Sensor, the P392. This gives high accuracy in a robust compact package with no moving parts to wear out!
The P392 masthead is a further development on the very successful P292. To the already proven ultrasonic wind component is added an automatic heater for operation in cold weather.
True wind systems are available by using this sensor with the Walker P1066 True Wind Interface Unit.