Why the E-CODER®)R900i™? Neptune’s E-CODER®)R900i™ combination absolute encoder register/radio frequency meter interface unit (RF MIU) provides two-way communications of advanced smart metering. The E-CODER)R900i ’s interleaved mobile and high-power fixed network messages allow for simple migration from walk-by to mobile to fixed network reading without site visits or reprogramming. From increasing efficiencies to pinpointing possible tamper or water theft to aiding customer service, the data supplied by the E-CODER)R900i can help your utility make better, more confident decisions.