Vibro-Meter: The Company

Vibro-Meter is a wholly owned subsidiary of Meggitt PLC, a multi-national high tech manufacturing company.

Meggitt PLC

Traded on the London Stock Exchange, annual sales for Meggitt PLC exceeded £670 million in 2006. Meggitt employs approximately 6,000 people worldwide

Meggitt PLC operates through four strategic business units: Meggitt Sensing Systems, Meggitt Control Systems, Meggitt Polymers & Composites, Meggitt Aircraft Braking Systems. Vibro-Meter is part of Meggitt Sensing Systems.

Meggitt Sensing Systems

This business unit produces high-technology piezo-electric and piezo-resistive sensors and a range of high volume electronic components including potentiometers, resistors, encoders and switches.

Sensing systems comprises:

• Vibro-Meter SA (Fribourg, Switzerland)
  A world leader in the design and manufacture of vibration monitoring systems for propulsion units and machinery used in commercial aircraft, helicopters, military aerospace, and industrial and marine installations. Vibro-Meter SA also provides instrumentation for rocket engines and nuclear applications.





 
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• Vibro-Meter, Inc. (Manchester, New Hampshire, USA)
  Formerly known as Meggitt Avionics Inc, this company became part of the Vibro-Meter family through a divisional product realignment. Vibro-Meter, Inc. designs and manufactures aircraft sensor systems including: fuel quantity gauging systems, fuel flow, engine oil level, and oil pressure sensors, chip detectors and chip collectors. Our industrial products include the Omniguard® optical UV and UV/IR flame detectors, and flame verification and characterization equipment.





 
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• Vibro-Meter UK (Basingstoke and Rugby, England)
  Acquired by Meggitt PLC in May 2002, Vibro-Meter UK was formerly known as Lodge. The Basingstoke facility produces a variety of sensors for aerospace applications; the Rugby site produces mainly ignition components for the industrial, marine, petrochemical and power generation markets.





 
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• Vibro-Meter France (Paris, Angoulême, Toulouse, and Archamps/Annemasse, France)
  VM France acquired ECET in 2005 and transferred the activity into VM France in early 2006. In Angoulême, VM France designs and manufactures ignition systems for aircraft and land based turbines, onboard electronic equipment, cockpit indicators, speed sensors, and pressure transmitters. Vibro-Meter France operates sales offices in Toulouse and Paris which cover the full product range of products from all Vibro-Meter companies around the world. Sensorex in Archamps/Annemasse (www.sensorex.fr), a 100% subsidiary of Vibro-Meter France, is known for designing and manufacturing linear and rotary displacement (LVDT/RVDT), inertial and hybrid sensors/electronics for applications in the severe operating environments of aerospace and other industries.





 
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• Endevco (San Juan Capistrano, California, USA)
  Founded in 1947, Endevco has grown from a small research and development firm into an international corporation supporting customers with a global network of manufacturing, research facilities, sales offices and field engineers. Products include piezoelectric, piezoresistive and variable capacitance accelerometers, integral electronic piezoelectric accelerometers and piezoresistive pressure transducers, related signal conditioners, measurement systems and accessories. 
  Endevco is certified to ISO 9001, the international standard for quality assurance. 
  Endevco website





 
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• Wilcoxon (Germantown, Maryland, USA)
  Founded in 1960, Wilcoxon houses a wide variety of modern manufacturing, assembly and test facilities suitable for producing standard and custom-designed product. Manufacturing and test equipment ranges from basic precision machinery for high quality sensor components to custom-built machinery for transducer fabrication. Today Wilcoxon Research continues to pioneer the development of advanced piezoelectric transducers for vibration sensing applications. It has undertaken research projects for industrial, military and government entities which include ONR, DARPA and the United States departments of energy, defence, commerce and transportation.
  Wilcoxon website

Vibro-Meter's Aerospace Division continues to be the leading supplier for Engine Condition Monitoring Systems used on almost all commercial aircraft and engines.

Vibro-Meter specializes in the design and manufacture of innovative solid state displays and systems for the measurement, processing and display of engine parameters, fluid monitoring, ice detection, helicopter rotor trim and balance, instrumentation for rocket engines, and nuclear applications.

Systems have been qualified for a range of military and civil aircraft including helicopters, jets, transports, airlines, business jets, commuter aircraft, and general aviation applications.

Fluid Monitoring

Debris Monitoring Fundamentals

Vibro-Meter is experienced in the design, development, and manufacture of debris monitoring products for the aerospace industry. Vibro-Meter offers a complete range of products to meet our customers needs ranging from a chip collector for an airline's gas turbine engine, or an advanced Auto-Fault® Digital Pulsed Chip Detector System for an attack helicopter.

Oil Debris monitoring is the most reliable method of detecting impending failure of bearings and gears used in gas turbine engines and helicopter gearboxes. The basic technology uses the principle of a magnetic sensor strategically located in the oil system to capture wear debris particles released from failing bearings and gears. The sensors may be manually inspected magnetic chip collectors or remotely monitored electronic chip detectors that send a warning to the cockpit "chip light". Advanced digital fuzz suppression systems eliminate nuisance alarms.

Fluid Gauging

Fluid Level Sensors

Fluid Measurement Fundamentals

Vibro-Meter's fluid level gauging systems provide unparalleled accuracy for fuel and oil quantity sensing, utilizing capacitance or magnetic float technology.

Our systems typically incorporate fuel and/or oil level sensors, signal conditioners, display units, and specialized controller devices.

Fuel Management

Vibro-Meter can provide complete fuel tank profiling for optimum probe quantity, location, and height. Each system is tested to extreme environmental conditions to give unprecedented reliability and low cost of ownership.

Oil Level Sensors

Engine, gearbox, and hydraulic oil level sensors are designed to operate in high temperature, high vibration environments common to engine-mounted accessories. Independent low level circuits provide discrete outputs for warning or control functions.

Indicators

Vibro-Meter manufactures a wide variety of cockpit indicators for military fighter jet, commercial jet transport, regional/business aircraft, helicopter, and general aviation applications. Our indicators are specific to each application, and use a multitude of form factors to present critical information to flight crews. A partial list of parameters displayed includes fuel quantity, fuel flow, control surface position, and fluid pressure, engine torque, rotational speed, and temperature. Vibro-Meter also produces indicators mounted in engine nacelles that allow ramp maintenance personnel determine oil level and/or chip detector condition. Vibro-Meter's experience with high temperature electronics make safer, faster engine servicing possible.

Ignition Products

Applicable to all gas turbine engines operating high energy ignition systems

Vibro-Meter offers complete ignition systems including low or high voltage exciters, with the mating high energy igniters and ignition leads, for gas turbine engines.

The modern gas turbine engine is continuously challenged to provide higher thrust ratios at lean fuel consumption. Vibro-Meter ignition technology maintains pace with these demands using material development and innovative designs. Operationally, the need for continuous ignition capability is increasing. Our unique semi-conductor materials reduce spark erosion, extending igniter life.

Features

• Patented semi conductor materials and exciter designs
• Low erosion rates
• Extended operational life
• Improved continuous ignition performance
• Universal selection of accessories covering
  • Leads
  • Connectors
  • Cable end fittings

Temperature Sensors

Fundamentals

Temperature Sensor

Vibro-Meter's temperature sensing products are specified by numerous gas turbine manufacaturers as the prime measurement source. Accurate measurement is available throughout the gas flow path of engines encompassing temperatures from 54°C to +1200°C. Other applications include bearing measurement of helicopter gearboxes and diesel engine temperature monitoring.

Typical Applications

• Gas Turbines
  • All stages from air inlet to exhaust gas temperature
  • Bleed air temperature measurement
• Gear Boxes
  • Direct bearing measurement
• Fluids
  • Fuel Systems
  • Oils
  • Water

Proximity and Position Sensors

Operating Principle

The Vibro-Meter UK 0100KPX and 0200KPX were developed as replacements for microswitch-based position and proximity sensors to detect the door lock actuator position for the Hurel-Hispano thrust reverser on the A318/PW6000. Both sensors utilize an air-gapped transformer to produce an electrical output as a ratio of excitation voltage. The 0100KPX sensor produces an output dependent on axial or lateral position of a ferromagnetic target attached to the moving element of the system. The 0200KPX produces an output dependent on the position of a ferromagnetic core attached internally to the sensor plunger, which is in contact with the door lock actuator. Both sensors interface with the FADEC controller to provide multi-level sensing. By eliminating electrical switch contacts, reliability is greatly increased. This technology can be used on other applications, such as airframes and closures, where confirmation or position is required.

Vibro-Meter is developing other sensors using similar technology, which can be influenced by non-ferromagnetic targets such as stainless steel and aluminum.

0100 KPX Construction

The 0100KPX proximity sensor is constructed from stainless steel with the connecting lead terminating in a connector or wire ended. The electrical components within the sensor are impregnated and protected from vibration and contamination by potting.

0200 KPX Construction

The 0200KPX position sensor is constructed of stainless steel. The plunger is sealed with a wiping action, spring energized, PTFE seal. The contacting face of the plunger is protected with nodular thin dense chromium plating providing excellent long term wear resistance and anti-galling properties. Venting is achieved by a micro-pore sintered filter that effectively eliminates fluids and contaminants. 

Displacement Transducers

The working principle of the new Vibro-Meter displacement transducer is the measurement of the variable inductance of a linear coil. The temperature compensation is built into the sensor and achieved by measuring the resistance of the coil. The displacement measurement is made by measuring the reactance. The measurement system is lightweight and especially suitable for OEM avionics applications. This type of displacement transducer reduces the length of the space envelope by about 40% compared with LVDT'S.

Typical applications are:

• Fuel regulation systems on jet engines
• Variable pitch blade servo systems for turbo engines
• Control of actuated surfaces on aircraft structures 

Pressure

Pressure Transducers

Dynamic Pressure Transducer for high temperature applications.

Vibro-Meter has developed piezoelectric dynamic pressure sensors for many aviation applications for extreme temperature environments. The force created on the diaphragm is applied to the piezoelectric stack which produces an electric signal charges). The secondary effect of vibration is internally compensated. Thus the generated signal is purely proportional to the dynamic pressure applied to the diaphragm. The working temperatures of these transducers can be higher than 700ºC. These types of transducers are used mainly for jet pipe resonance detection on various engines for military applications. State of the art devices have also been released with two channels in order that redundancy is "built in" and a better interface provided for BITE functions. 

Speed Probes

Fundamentals

The speed probe is an alternating voltage generator producing an electrical signal. The frequency of this electrical signal is proportional to the engine shaft speed. The speed probe contains one or two coils and a rare earth permanent magnet. In rotating machinery the speed probe sensing surface faces the phonic wheel. The magnetic flux varies in density with the passage of each tooth. These flux changes induce an alternating voltage in the coil surrounding the permanent magnet, the frequency of which is a function of shaft speed.

Typical Sensor Features:

• One or several complete enclosed sensing elements
• Active system, no supply voltage required
• Wide temperature range
• Advanced wire interconnection technique
• Hermetically sealed construction
• Stainless steel, titanium, or Inconel 600 housing
• Designed for aircraft engine
• Environmental conditions
• No scheduled maintenance
• High MTBF - basic design adaptable for customised construction

Typical Applications for Speed Probes:

• Shaft rotational position
• Direction of rotation
• Shaft torque
• Rotor revolution
• Wheel Speed 

Optical Sensors

Light-Off Detectors

Vibro-Meter's Light-Off Detectors (LOD) detect the presence of afterburner ignition on military aircraft. The LOD uses Vibro-Meter produced ultra-violet radiation detectors (UV tubes) that view the afterburner flame through a port in its liner. Critical attributes of this sensor are immunity to sunlight and rapid detection times despite exposure to afterburner temperature and pressures.

On-board Electronic Controllers

Energy products

Total Condition Monitoring for Rotating Machinery

VibroSight™ total monitoring solution 
Discover more about the VibroSight™ product

Vibro-Meter specializes in the design and manufacture of innovative measurement and processing systems for the power generation, petrochemical, turbo-machinery, and aviation markets.

The energy division of Vibro-Meter provides complete protection, condition, and performance monitoring solutions for all rotating machinery applications. Products include a comprehensive range of transducers and associated hardware, as well as condition and performance monitoring solutions. Our expertise in reliable, high quality systems spans more than five decades.

The largest Vibro-Meter site in Fribourg, Switzerland, was founded in 1952. Vibro-Meter, Inc. in New Hampshire traces its heritage back to the orignal Thomas A. Edison Company, and holds fast to Edison's guiding principles of invention, leadership, and technological advancement through continuous research and development. The latest additions to Vibro-Meter, the former Lodge business in the UK, also have a proud heritage.

With our commitment to engineering expertise, our comprehensive manufacturing resources, worldwide technical support, full service repair capabilities, and international network of subsidiaries and distributors, help is never far away. 

Sensors

Vibro-Meter is well known for the quality and reliability of its sensors, especially for applications in extreme environments. High and low temperatures, radiation, humidity, chemicals -- whatever the demands, you'll find a Vibro-Meter sensor that will not only survive but work well.

Importantly, we treat our piezoelectric materials for maximum stability; therefore, most of our sensors do not require routine calibration.

In this section you will find data covering the most common types of sensors used for industrial and marine applications. If you do not see what you want here, please ask us -- we have many more products available.

Signal Conditioners and Barriers

Overview

Vibro-Meter has evolved a signal transmission system that provides clean data over long distances in electrically noisy environments.

At the earliest opportunity (using electronics inside the sensor housing, if possible, or a separate signal conditioner module located close to the sensor) we convert the analogue charge or voltage waveform from the sensor into a balanced current signal. This can easily drive up to a km of standard screened twisted pair instrumentation cable. At the receiving end, the current signal is connected to a GSI or GSV module, which acts as an electrical isolator, coverts the signal back to a voltage, and provides any power required by the sensor and its conditioner. This voltage signal is then routed to the monitoring or data acquisition electronics. Intrinsically safe signal chains are available.

The current transmission system has proven itself to be extremely reliable and trouble free, even in difficult environments with high electrical noise. Voltage transmission is an option for the IPC 704 and some other chains.

VM600

Overview

The VM 600 is a digital, modular, scaleable hardware and software solution for Plant Usage Optimization, providing integrated machinery protection, condition and advanced performance monitoring from a single source.

VM 600 is the most advanced, flexible and configurable system available. Among many innovative features, the signal processing cards can accept any normal transducer (absolute vibration, shaft vibration, displacement, temperature, pressure, etc.) and perform any machinery monitoring function without the need for different sub-modules or hardware adjustments -- the cards are fully software configurable. This simplifies specification, installation and training, while reducing spares stocks and service times.

The VM 600 condition monitoring software is powerful and fully featured, while remaining easy to learn and to use, running under Windows^TMNT/2000, SCO Open Server^TM (Unix) or Linux^TM, on standard networks. Full remote access with multi-level security is available.

For full control over turbomachinery running costs, Vibro-Meter provides VM 600 performance monitoring software. Using data from the VM 600 and other systems, the operator sees the exact condition and performance of his machinery. Advisory functions include maintenance actions required, cost optimization, hot parts life calculation, emmissions tax calculations and more. Performance monitoring is usually applied to gas turbines and the VM 600 software excels in this, while also covering steam turbines, compressors and pumps. 

Compact Monitors

VibroSmart

The VMU100 Compact Monitor is a surprisingly powerful protection monitor in a compact and rugged housing. Fully programmable, this digital monitor provides power and signal conditioning for the sensor, and performs filtering, rectification, and level comparisons on the signals to provide early warning of machinery problems, and shut-down in the event of a serious failure. There are optional DC outputs and optional serial communications for remote set-up and collection of level and status information. The live, unfiltered buffered dynamic signal is available on a BNC connector for data collectors and analysers. 

Fire Detection

Omniguard® ... First in Flame Detection

The value of early fire detection is immeasurable in the protection of human life and valuable property. Omniguard® flame detectors are known throughout the world for their outstanding quality and reliability in a wide variety of high risk fire protection applications.

Discrimination between a true fire and a "false alarm" event is also critical for efficient and cost effective protection management. That is why Omniguard® flame detectors are widely used in aircraft hangars, fuel transfer stations, natural gas compressor stations, and petrochemical storage facilities.

Vibro-Meter, Inc. manufactures several families of optical sensing devices. Over 75 years of optical sensing experience and expertise has allowed us to pioneer many new technologies that have set the standards for the industry.

Using UV or IR sensors, or a combination of both, we are able to sense and notify the user of various conditions and parameters of flame.

Our Omniguard® line of UV and UV/IR flame detectors (Models 660, 760, 860, and 860 Multi-Spectrum) are used to notify when a potentially dangerous fire (an "unfriendly fire") has started. All detectors are explosion-proof devices, and are certified for use in hazardous area applications. Vibro-Meter, Inc. pioneered both the first UV and the first UV/IR detectors, and continue to lead the industry with superior performance, features, and quality

All Omniguard® Detectors provide:

• five year warranty on the UV and IR sensors used in our flame detectors
• three year total warranty against component or manufacturing defects
• design, engineering, and manufacture exclusively by Vibro-Meter, Inc.

We recently introduced our new Fuel Contamination Detector^TM (Model 970), which is based on IR sensors. This new detector is able to both monitor the presence of flame, and also identify and quantify the presence of contaminates in the fuel being burned. This is especially important to turbine manufacturers and users. 

Edison® UV Flame Scanners

First in Flame Monitoring^TM

Edison® UV Flame Scanners have been in use for more than 40 years, providing dependable flame on/off indication for gas turbines and boiler applications.

Vibro-Meter, Inc. also offers flame scanners utilizing the latest in solid state optical technology. Using fiber optic cables, a remote electronics/sensor suite, and customized analytical software, this solid state system continues our tradition in reliable flame monitoring solutions.

The Vibro-Meter Flame Scanner is an ultraviolet-based detector used to indicate the presence or absence of a flame within the combustor of an industrial gas turbine. These devices, via a view port directly in the turbine combustion zone, continuously monitor flame status and provide feedback to the control system through relay outputs. This monitoring is particularly critical during engine start-up and light-off of the turbine combustors.

Using the Edison developed ultraviolet tube for sensing, the scanner responds to the ultraviolet radiation with wavelengths between 1900 and 2900 angstroms (present in all flames), but does not respond to infrared or visible spectrums. Therefore, it is suitable for supervision of gas-fired, oil-fired, or combination industrial burners or turbines.

Available in standard, weather-proof, and explosion-proof, these units have proven themselves to be dependable, quality performers.

Pictured are Vibro-Meter's three Flame Scanners.   L to R: Standard, Weatherproof, and Explosion-proof

Optical Combustion Monitors

Model 970
Flame Contaminant Detector (FCD™)

Download Data Sheet

Features

• Harsh environment design.
• Solid-state flame sensor technology.
• Non-intrusive combustion analysis.
• Multi-wavelength sensors.
• Instantaneous and continuous contaminant measurement.
• Extensive data storage capabilities.
• Hermetically sealed turbine interface.
• Utilizes existing flame scanner ports.

Vibro-Meter, Inc., an industry leader in optical flame detection technology, introduces a breakthrough advancement for gas turbine applications. Based on over thirty years of flame detection experience, the Model 970 Flame Contaminant Detector (FCD) provides real time monitoring of corrosives as they are consumed within the combustion process of an industrial or marine gas turbine.

The FCD is a dual-purpose solid-state flame scanning and monitoring system. It provides non-intrusive, continuous optical monitoring to identify the presence of metal contaminants that will accelerate hot section corrosion in a gas turbine. The FCD is designed to detect, qualify, and provide alarms for the presence of sodium, calcium, potassium, or vanadium being introduced into the combustion zone via fuel, air, or water. The unit also provides simultaneous flame on/off detection.

Utilizing fiber optic cable and remote electronics, the FCD readily interfaces with existing combustor flame scanner ports. Integrated computer interface software displays flame status and real-time contaminant activity for up to four combustors at one time.

Benefits

• High reliability and false indication immunity.
• Precise contaminant indication and quantification.
• Eliminates need for off-line fuel analysis.
• Stores contaminant activity for later reference.
• Ease of installation. 

Ignition Systems

Introduction

Vibro-Meter's range of quality high tension and high energy ignition products are in use worldwide where high reliability is demanded in hazardous environments and climate.

Our igniters and exciters, including our multiple output exciter, and high tension ignition unit with flame detection, have applications in traditional and low emission industrial and marine turbine engines, oil and gas exploration, petrochemical process flare stacks, and smaller process and heating burners.

 Download Data Sheet [85k]
 Download Brochure [380k] 

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