The ZMD0500B is a Miniature Length Sensor with quadrature output. Designed for light to medium duty sensing applications, the miniature length sensor, model ZMD, is compact in size and easy-to-use. It features a built-in spring-loaded torsion arm that provides a simple-to-adjust torsion load, allowing the unit to be mounted in almost any orientation, including upside down. Using a 6" or 200mm wheel, the ZMD can be used on almost any surface, while operating at speeds up to 3000' per minute. The housing is a durable, conductive composite material that will eliminate static build up. Whether you need to measure speed, position or distances, the Model ZMD is the ideal solution.