Incremental magnetic encoder rings from ASM Sensors come in three sizes to accommodate different shaft sizes and yield up to 184,320 pulses per revolution in conjunction with the quadrature encoder read head, PMIS4 series. Both units were designed to operate in harsh environments. This noncontact incremental encoder system consists of a magnetoresistive read head, PMIS4, and a dual-channel magnetic ring, PMIR7. The sensor head is completely enclosed in a metal housing and generates the industry standard A, B, Z output pulses for quadrature detection with reference mark. The PMIR7 magnetic rings come in three sizes that can be quickly press-fitted onto 27-, 35-, or 50-mm shaft diameters.