Why the ProCoder™? The Neptune ProCoder solid state absolute encoder register features a high-resolution, mechanical sweep hand to detect ultra-low flows as well as monitor direction of flow. The ProCoder’s non-contact LED absolute encoding technology ensures the odometer read exactly matches the remote read. It provides a high-resolution, 8-digit remote meter reading along with leak, tamper, and reverse flow flags when connected to a Neptune R900 System endpoint.