Vibration Sensors feature radiation-resistant design.

Press Release Summary:

By monitoring vibration in nuclear power plants, Wilcoxon 793R Series helps ensure continuous power generation and safety for personnel and equipment. Radiation-hardened units can tolerate cumulative radiation exposure of 1 x 107 RADs and can operate up to 248°F. To ensure reliable data output, Wilcoxon J9T2 cable assemblies feature Tefzel® coating for high energy radiation-resistant protection. Tefzel® meets IEEE 383 Standard and is approved for nuclear power plant use.

Original Press Release:

Meggitt Sensing Systems Releases Radiation-Resistant Vibration Monitoring Solutions

Nuclear power plants utilize vibration monitoring to ensure continuous power generation and safety for personnel and equipment, and prevent radiation leaks. Expensive and crucial machinery including cold water feed pumps, pressurized water reactors, and steam generators operate more efficiently as a result of condition monitoring. Meggitt has developed new radiation-hardened vibration sensors and cable assemblies to meet specific requirements for the reliability of monitoring equipment in nuclear evironments.

“The increased need for nuclear power plant output reliability and operational safety calls for increased monitoring of machinery”, said Tom Smith, Vice President of Sales & Marketing for Wilcoxon Research products. “Our radiation-resistant sensors and cable assemblies provide reliable data that plant personnel can trust when evaluating machine condition, potentially preventing an environmental disaster or loss of power production.”

Radiation-resistant accelerometers

The conditions of nuclear power plants can cause deterioration of equipment. Wilcoxon accelerometers are designed to perform continuously in harsh environments without degradation. Mechanical components used in Wilcoxon 793R series sensors were subjected to gamma radiation exposure in excess of 2 x 107 RADs without degraded sensor performance. Wilcoxon radiation-hardened sensors can tolerate a cumulative radiation exposure of 1 x 107 RADs, still meeting original manufacturing specifications, and are operable up to 248°F (120°C). Model 797R is a side exit, low profile IsoRing accelerometer with tight sensitivity tolerance of 100 mV/g, ±5%. Its velocity transducer houses ultra low-noise electronics for clear signals at very low vibration levels, and has a frequency range of 2 Hz to 7 kHz.

Cable assemblies and enclosures

To ensure reliable data output, Meggitt manufactures Wilcoxon J9T2 cable assemblies with Tefzel® coating for high energy radiation-resistant protection. Tefzel® meets the IEEE 383 Standard for Qualifying Class 1E Electric Cables and Field Splices for Nuclear Power Generating Stations, and is approved for nuclear power plant use. Impervious to most solvents and chemicals, Tefzel® is hydrolytically stable and usable up to 302° F (150°C). The R6QN-0-J9T2 cable-connector assembly offers a molded polychloroprene boot and Tefzel® insert suited for radioactive environments. A tight and inpenetrable seal between cable and sensor protects the transfer of data. For permanent sensor installation and portable data collection, IP66 rated CB2 and CB4 connection boxes can be used in wet environments where the presence of water jets exists. Meggitt also produces a wide range of Wilcoxon VibraLINK switch boxes, available with NEMA 4X-rated thermoplastic or stainless steel boxes. Additional options include cable grip and BOV meters for centralized data collection. Vibration monitoring solutions for nuclear environments are offered by Meggitt backed by extensive industry knowledge, excellent customer service and product reliability.

For further information contact:

Meggitt Sensing Systems

Shalvi Desai

Marketing Communications Specialist

+1 301 216 3039

Meggitt Sensing Systems, a division of Meggitt PLC, is a leading supplier of high-performance sensing and monitoring

systems for physical parameter measurements in extreme environments. It has operated since 1927 through its

antecedents—ECET, Endevco, Ferroperm Piezoceramics, Lodge Ignition, Sensorex, Vibro-Meter and Wilcoxon Research —

whose portfolios form the basis of product lines offered by today’s Meggitt Sensing Systems. Meggitt Sensing Systems

designs and manufactures the Wilcoxon Research product line of vibration sensors at its facility in Germantown, Maryland,


Meggitt PLC, Headquartered in the United Kingdom, Meggitt PLC is an international group operating in North America,

Europe and Asia. Known for its specialised extreme environment engineering, Meggitt is a world leader in aerospace, defence

and energy, employing nearly 11,000 people at more than 40 manufacturing facilities and regional offices worldwide. 

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