Vibration Transducer suits gas turbine applications.

Press Release Summary:

High-Temperature Velocity and Acceleration Sensor (HTVAS) 350900 keeps sensing element separate from signal conditioning electronics, allowing it to be used in applications with surface temperatures to 900°F. Casing-mounted vibration transducer uses mineral-insulated hardline cable between sensor and signal conditioner to eliminate intermittent connector failures. Sensor returns acceleration and velocity measurements simultaneously.

Original Press Release:

GE Energy Introduces New Vibration Transducer

HOUSTON, TEXAS-September 22, 2004- GE Energy has announced an important addition to its Bently Nevada® product line with the introduction of a new high-temperature casing-mounted vibration transducer intended for aeroderivative and industrial gas turbine applications. The product was unveiled to customers today during the 33rd Annual Texas A&M Turbomachinery Symposium and is now available for purchase.

Building on over 25 years of experience with seismic vibration measurements on gas turbine casings, the new 350900 High-Temperature Velocity and Acceleration Sensor (HTVAS) is designed for use on a wide variety of gas turbines, regardless of make, model or manufacturer. The transducer design separates its sensing element from its signal conditioning electronics, allowing it to be used in applications with surface temperatures of up to 900° F (482º C), as typically encountered on gas turbines. Use of a mineral-insulated hardline cable between sensor and signal conditioner eliminates intermittent connector failures, a common source of problems, resulting in a more robust design.

In addition, the sensor returns both acceleration and integrated acceleration (velocity) measurements simultaneously. Excessive casing vibration velocity is often used for machinery protection alarms, while the unfiltered acceleration signal is highly useful for machinery diagnostics. By supplying both signals simultaneously, the new HTVAS simplifies installations and reduces noise compared to designs that extract a velocity measurement further away from the transducer.

The transducer is compatible with the Bently Nevada® 3500 series machinery protection system, which provides special monitoring modules for addressing the unique filtering and signal processing requirements of gas turbines. Designed to address the needs of a new unit from a leading gas turbine manufacturer, the transducer is broadly applicable to a variety of gas turbines, allowing users to easily retrofit it in the field when upgrading from older sensors or when instrumenting units without any currently installed vibration sensors.

In addition to the sensor, a variety of service offerings are available to assist customers in selecting the proper sensors for their gas turbines, installing the sensors, and integrating them into the appropriate machinery protection, machinery control and condition monitoring systems.

This news release is available for download at and also available to be viewed at

Bently Nevada products and services provide global leadership in assessing and ensuring the mechanical and thermodynamic health of industrial machinery. With operations in Minden, Nevada, and offices in the principal industrial centers of over 40 countries, the highly experienced Bently Nevada product team serves a broad base of more than 25,000 global customers in the power generation, petrochemical, and other industries. Bently Nevada is a GE Energy ( business.

About GE Energy
GE Energy ( is one of the world's leading suppliers of power generation and energy delivery technology, with 2003 revenues of nearly $18.5 billion. Based in Atlanta, Georgia, GE Energy provides equipment, service and management solutions across the power generation, oil and gas, transmission and distribution, distributed power and energy rental industries.

For more information, contact

Dennis Murphy
GE Energy
(678) 844 6948

Gina DeRossi or Howard Masto
Masto Public Relations
(518) 786-6488

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