The initial concept of NORAC’s Ultrasonic Sensor was developed more than 15 years ago and has cultivated into a leading technology of high precision. NORAC Ultrasonic Sensors are easy to configure, microprocessor based and temperature compensated. They also featuring advanced clarity, reporting the top of the crop, soil, and multiple levels in between simultaneously. This is useful in applications where the crop height and other agronomic data is of interest such as prescription mapping, real time variable rate, crop measurement, and crop mapping. The readings can be used in conjunction with NORAC’s patented Hybrid Mode™ algorithms, which use a “virtual top of crop” to add stability for a variety of control applications.