The SENTINEL® is a solid-state, polyphase meter of exceptional accuracy. This self-contained or transformer-rated meter is designed for use in commercial and industrial locations, including large industrial sites and substations.

The SENTINEL meter lets you effectively manage the needs of Commercial and Industrial Companies today while providing the flexibility to meet the challenges of tomorrow. The SENTINEL meter is a highly extensible business tool for today's competitive market. Demands for more information, faster information, and better information continue to increase as the utility industry evolves. The future of your business depends on how well you can adapt.

When you deploy a SENTINEL meter, you can:

• Achieve greater accuracy and reliability in the complex interval data required by Commercial and Industrial Companies. This solid-state, electronic multi-measurement, polyphase meter has exceptional accuracy. During manufacturing, precision instrumentation is used to compute correction coefficients for each phase under a variety of load and power factor conditions, and the correction coefficients are written into a protected non-volatile memory that can never be erased.
• Improve voltage quality for Commercial and Industrial customers with powerful voltage and harmonics monitoring at the meter.
• Easily adapt to the changing needs of your business. Modular architecture is the source of the SENTINEL meter’s flexibility. The microprocessor-based register performs the primary functions including energy, demand, time-of-use, and load profile. The metrology performs the direct sampling of the voltage and current waveforms and the raw processing of these samples to compute all the fundamental energy quantities. Register functions and firmware can be easily updated without disturbing the fine calibration of SENTINEL meter’s metrology or returning the meter to the factory.
• Reduce operational costs associated with meter feature sets by using Itron’s MeterKey™ application with SmartCard™ technology for firmware updates.
• Choose the meter reading communication protocol that meets your needs. The SENTINEL has two ports for communicating with the meter register: an optical port and a 9600-baud auxiliary data port. Optional communications modules are available for Ethernet, radio frequency (RF), modem, serial RS-232/RS-485 and GPRS SmartMeter.