Wixom, MI-based A-DAT Corp. introduces a new, more accurate speed and distance sensor for automotive research and development applications. Dubbed OS1, it is claimed to be the first speed and distance sensor based on digital optical correlation — which makes it more accurate than current contact and non-contact speed sensors such as those used for 5th wheels (contact) and radar Doppler systems (non-contact), company officials say. So-called 5th wheel systems lose accuracy when they bounce over rough pavement. Wheel-speed sensors — another type of contact sensor — also can lose accuracy when vehicle wheels spin and slip, says an A-DAT spokesman. The new OS1 system is even more precise and accurate than non-contact radar Doppler, can be mounted almost anywhere and is designed to withstand harsh environmental conditions.