The ITRON CENTRON LCD meter is the standard utility-grade meter seen on most homes. 240 volt, 4 terminal, solid state, LCD read out & poly carbonate cover C1SCENTRON Meter The CENTRON C1S solid-state meter is used for measuring single-phase energy consumption. With this solid-state meter, Itron presents a platform for residential metering with the flexibility to adapt as your needs expand and change.