Neptune®E-CODER® Register

We Currently Only Sell In Alberta and NWT

A true absolute encoder, the E-CODER® is the foundation of a smart water meter. In addition to all the features of a basic encoder register, when the E-CODER is connected to an R900® or R450™ RF MIU, it provides value-added PLUS features – leak, tamper, and reverse flow detection.

Utility software applications can use E-Coder PLUS information in billing, customer service, and operational reports. Providing 8-digit readings (absolute 9-digit meter readings on its display) and resolution down to 1/10th of a gallon, the E-CODER’s accuracy and reliability form a solid foundation on which to build and expand an AMR or AMI system. The E-CODER is available in two different configurations for specific applications – inside set and pit set.

E-CODER® Solid State Absolute Encoder

Build Onto Your Existing Technology Investment

The E-CODER® is Neptune’s high-resolution solid state absolute encoder register. The E-CODER features a custom integrated-circuit design that digitally encodes the rotation of the measuring chamber, providing “absolute” registration with no internal battery requirement. The E-CODER functions in two modes: E-CODER BASIC and E-Coder PLUS. The E-CODER BASIC mode functionality is the same as ProRead™ (ARB® VI), featuring program-ability up to a 10-digit ID number, three user characters, and 3-6 digit meter reading. In addition to the meter reading, the E-CODER provides a visual readout on rate of f low every twelve seconds when the LCD display is activated. When connected to Neptune® R900®, R450™, or cellular MIU (CMIU™), the E-CODER automatically operates in E-Coder PLUS mode, providing a high-resolution, 8-digit remote meter reading, and value-added features including leak, tamper, and reverse f low detection. True point-of-use leak detection is provided by monitoring a 24-hour period in fifteen-minute intervals. Tamper detection is provided by reverse f low detection and monitoring the number of days of zero f low over the previous 35 days

The E-Coder PLUS features are communicated through the E-CODER protocol, allowing host software platforms to interpret the data and pass the information directly to billing packages, CIS screens, and operational and maintenance reports. The E-Coder PLUS features enhance customer service and improve operational efficiencies for water utilities.

The E-CODER is available in two different configurations – inside set meters and pit set meters. For inside set applications, the E-CODER is housed in our plastic encoder register housing with terminal screws. For pit set applications, the E-CODER is housed in a glass lens and copper can enclosure with factory-potted wire connections


Neptune provides a 10-year limited warranty with respect to its E-CODER solid state absolute encoder register for performance, materials, and workmanship.


  • High-resolution remote meter reading
  • Leak, tamper, reverse flow flags
  • Easy-to-read 8-wheel mechanical odometer
  • High-resolution mechanical sweep hand
Download Product Documents Below
We Currently Only Sell In Alberta and NWT

Neptune® E-CODER® Product Brochure
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Neptune® E-CODER® Quick Install Guide