CS303-FP Magnetoresistive Vehicle Detector - 50-ft. Condition is New. Shipped with USPS Parcel Select Ground.***YOU ARE BUYING THE SENSOR ONLY - REFER TO THE PICTURES*** PRODUCT OVERVIEW FOR THE CARSENSE303 VEHICLE DETECTOR: The CarSense303 vehicle detector features advanced 3-axis, magnetoresistive sensing technology that responds to changes in the Earth’s magnetic field caused by ferrous objects. Three sensing elements provide measurements in the X, Y and Z axes to improve detection sensitivity when used in either above or below ground installations. The CS303 is equipped with our new DETECT-ON-STOP™ or (DOS®) feature, which allows detection only when a vehicle has come to a complete stop. This exclusive feature is unique to EMX and is a major advantage if you want to ignore cross traffic in tight spaces. The detector’s compact, loop-less design reduces installation costs when compared to traditional inductive loop technology.