The ModQ Sentry is a C1D2 Non-Incendive Modbus Flow Totalizer. It features a local display with flow rate, totalizer and modbus settings. It can integrate with industry standard turbine meters. It also features local pushbuttons for configuration. Additional features include: Externally and/or battery powered with auto switch over, Real-Time-Clock with battery backup, 1” female NPT standard swivel coupling with 2 pin connector inductive type turbine meters, Configurable contract hour with real-time clock & battery backup, 32 day built-in local data historian/backup storage, Settable K Factor from local interface, Weathertight rugged enclosure for outdoor operation, Easy to install and maintain, and Configurable volume and time units.