Nortech International is a leading supplier of  Inductive Loop Vehicle Detectors. The primary function of a vehicle detector is to detect vehicle presence by means of an inductance change caused by the vehicle passing over a wire loop buried under the road surface. Nortech Vehicle Detectors are state-of-the-art products incorporating many innovative features now copied by rival products. These products are machine assembled, employing SMD technology and a single microprocessor chip for superior performance and reliability.