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Press Release

Itron, Elster and Trilliant Announce Support for ANSI C12.22 Open Communication Standard

Advanced metering companies enhance product interoperability through adoption of newly published standard

LIBERTY LAKE, Wash. — March 24, 2009 — Elster, Trilliant and Itron Inc. (NASDAQ: ITRI) announced today that they have joined forces in support of C12.22, the newly published standard from the American National Standards Institute (ANSI). The open standard is fundamental to advanced metering, allowing for interoperability between smart devices and networks.

In a joint statement Elster, Trilliant and Itron said, "Interoperability allows utilities to utilize multiple communication networks or change communications technologies without touching the meter. In this way, we believe that open standards in general, and ANSI C12.22 in particular, help protect the investment that utilities, ratepayers and shareholders make in advanced metering."

The ANSI C12.22 open standard defines how to transmit standardized tables of meter data across wired or wireless networks using various transports such as IP. This open standard can play a vital role in unifying the information collected from advanced metering infrastructure (AMI) projects and smart grid initiatives while allowing utilities to select the communication technologies that make the most sense for their budget, objectives and service territory including:

• Itron's AMI offering, OpenWay® by Itron, and its components including the OpenWay CENTRON® meter, OpenWay Collection Engine and OpenWay Cell Relay
• Elster's EnergyAxis® AMI System and smart metering systems and solutions
• SecureMesh by Trilliant®

These products employ the ANSI C12.22 standard to support communications within their networks and with AMI-enabled meters, in-home displays, programmable communicating thermostats, load control switches, and other devices to and from the headend.

The contents and scope of ANSI C12.22 may be viewed, or a hardcopy or electronic copy purchased for $160, by visiting NEMA's website at http://www.nema.org, or by contacting IHS at 800-854-7179 (within the U.S.), 303-397-7956 (international), 303-397-2740 (fax), or on the Web at global.ihs.com.


About Itron

Itron enables utilities and cities to safely, securely and reliably deliver critical infrastructure services to communities in more than 100 countries. Our portfolio of smart networks, software, services, meters and sensors helps our customers better manage electricity, gas and water resources for the people they serve. By working with our customers to ensure their success, we help improve the quality of life, ensure the safety and promote the well-being of millions of people around the globe. Itron is dedicated to creating a more resourceful world. Join us: www.itron.com.

Itron® and OpenWay® are registered trademarks of Itron, Inc. All third-party trademarks are property of their respective owners and any usage herein does not suggest or imply any relationship between Itron and the third party unless expressly stated.

PR Contact

Alison Mallahan

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(509) 891-3802