Global product launch!

Meggitt Sensing Systems,  has announced the global market launch of the Endevco® model 126, a low-cost, microprocessor controlled, three-channel DC differential voltage amplifier and signal conditioner.  This model is designed with flexible setup and a wide bandwidth to 200 kHz (-3 dB corner), allowing it to be used with Endevco®  bridge-type or differential output accelerometers and pressure transducers, or other industry models, across a variety of general purpose laboratory testing applications.

The Endevco® model 126 incorporates variable gain adjust

ment, shunt calibration capability, as well as automatic zero adjustment capability for elimination of inherent DC offset voltage. The unit also features three independent operating channels with individually programmable excitation voltage level settings from 0-12 VDC; differential output and gain adjustment range from 0 to 999.9; an independent filter selectable function; and BNC output connectors, for easy hookup to readout and recording instruments. In addition, remote sense leads are provided to eliminate errors caused by driving long cable lengths.

Common applications for a high amplitude measurement system which includes the Endevco® model 126 DC sensor vibration amplifier and signal conditioner, along with appropriate sensors, include drop testing; consumer electronic products testing; metal-to-metal impacts; penetrator tests, structural blast loading; weapons data recorder testing; automotive crash test; and impact testing. In addition, all Endevco® signal conditioners are accompanied by a five-year comprehensive product warranty.

Acoustic measurements products guide

Meggitt Sensing Systems, a Meggitt group division, has announced the global release of its new “Endevco® Acoustic Measurement Products Selection Guide”, a single comprehensive product specification resource, detailing Meggitt’s complete range of Endevco® acoustic sensors and instrumentation for automotive NVH, cabin noise, vibro-acoustic testing, appliance noise evaluation, environmental noise analysis, building acoustics, appliance noise evaluation, wind tunnel testing and other critical measurement applications.

Endevco® prepolarized condenser measurement microphones are offered in free-field, pressure, low-cost   array and random incidence types and may be used to meet IEC and ANSI standards. Array microphones offer a lower overall per channel measurement cost and are directly compatible with ISOTRON® (IEPE-type) signal conditioning, facilitating their use as drop-in replacements within existing accelerometer test system set-ups for as-needed precision noise measurements. Models may be purchased as stand-alone units or in a microphone and low-noise preamplifier combination with TEDS for larger channel count applications. Available for use with Endevco® precision measurement microphones are a full range of low-noise ISOTRON® preamplifiers, handheld calibrators and accessories.

Field mike!

Meggitt Sensing Systems Launches New Endevco ½” Free-Field Microphone and Preamplifier Set with TEDS Capabilities

Meggitt Sensing Systems has introduced the Endevco® model EM46AE, a combined 1/2” free-field pressure microphone and iTEDS enabled preamplifier (per IEEE 1451.4) set, designed for general purpose and larger channel count precision acoustic measurements within a variety of applications, including vehicle pass-by noise testing; environmental noise analysis; building acoustics; and appliance and other consumer product noise evaluations.

The Endevco® model EM46AE comes in a preassembled kit, consisting of a high-precision condenser microphone and preamplifier, both constructed of stainless steel for high durability. Units are assembled in a clean room environment to avoid contamination of the contacts and are calibrated together to form a reliable acoustic measurement system. These combined units are fully repairable. With a frequency response from 3.15 Hz to 20 kHz and a wide dynamic range of 14 dBA to 135 dB, the Endevco® model EM46AE microphone set is designed according to guidelines set forth by the IEC 61094 Class 1 standard, fulfilling the highest industry standards for acoustic product reliability and precision. Incorporation of iTEDS technology allows for the microphone and preamplifier to be recognized by any smart-transducer compatible input module. When connected, the analyzer will derive information such as microphone type, serial number and sensitivity, which is able to be read by the application software for simplified test setups.

Recommended accessories for use with the Endevco® model EM46AE include the model EM42AA handheld pistonphone calibrator, which facilitates field checks of complete acoustic measurement systems, as well as the in-house calibration of measurement microphones; the model 4416B ISOTRON® power supply (2-20 mA); and the model 133 three-channel signal conditioner. All Endevco® acoustic sensors and instrumentation are also backed by a five-year comprehensive product warranty.

High-sensitivity absolute pressure transducers

Meggitt Sensing Systems has introduced the Endevco® model 8530C series, a family of high-sensitivity piezoresistive absolute pressure transducers, offering high output and a non-linearity of 1% at 3x over-range in a highly compact (3.86 mm face diameter) package. The unique design and performance characteristics of this series make them ideal for use in hydraulic and pneumatic pressure measurements, automotive airbag testing and transmission testing applications.

Offered in ranges of 15, 50 and 100 psia with 225 mV full scale output and high resonant frequencies of 180 kHz (15 psia), 320 kHz (50 psia) and 500 kHz (100 psia), the Endevco® model 8530C series features an active four-arm strain gage bridge, diffused into a sculpted silicon diaphragm, for maximum sensitivity and wideband frequency response. The volume behind the diaphragm is both evacuated and glass sealed to provide an absolute pressure reference. The transducers also feature integral temperature compensation, providing stable performance over a temperature range of -18°C to +93°C (0°F to +200°F). Units are supplied with an integral cable, with custom lengths available upon request. A 10-32 UNF-2A mounting thread is standard, with an integral four-pin connector available with the “M37” option.

Endevco® model 8530C series transducers are rugged to 20,000 g shock and offer an industry best-in-class minimum 4X burst pressure, with non-linearity, non-repeatability and pressure hysteresis errors of less than 0.50% FSO for all ranges, making it one of the industry’s most accurate pressure transducer series. Recommended accessories include the model 136 three-channel signal conditioner, model 4430A signal conditioner, or model 4990A (Oasis).

Miniature high-frequency piezoelectric accelerometer is best seller

Meggitt Sensing Systems, a Meggitt group division, has announced that the Endevco® model 2222C was the company’s top-selling piezoelectric accelerometer of 2010.

With a sensitivity of 1.4 pC/g and frequency range of 1 to 10k Hz (±1 dB), the high-impedance model 2222C is designed for general purpose vibration measurements of small structures or objects, such as those typically encountered with scale models, circuit boards and disk drives. The sensor’s overall weight of 0.14 gram (not including cable) effectively minimizes mass loading concerns, with a shock limit that is two times that of any other accelerometer of its size and type on the market. The model 2222C is a self-generating, adhesive mounted device that requires no external power source for operation. Units are ground isolated from the sensor mounting surface. A specially designed low-noise coaxial cable and sensor installation/removal tool are supplied for error-free operation.

Recommended accessories for use with the Endevco® model 2222C include the model 2961 triaxial mounting block, model 133 three-channel signal conditioner, model 2775B signal conditioner and model 2771C-XX inline charge converter. Due to the sensor’s versatility and performance characteristics, it is ideal for any shock and vibration monitoring applications within non-harsh conditions, including general purpose in-house laboratory testing; drop testing and vibration monitoring of portable electronics; flight vehicle or UAV vibration monitoring; and automotive component durability testing.

The Endevco® model 2222C is accompanied by a comprehensive five-year product warranty and is available at specially discounted pricing as part of the Endevco® competitive trade-in (CTi) program.

Variable capacitance accelerometers

Meggitt Sensing Systems Introduces TEDS Capabilities into

Meggitt Sensing Systems has introduced Transducer Electronic Data Sheet (TEDS) capabilities into its industry best-selling Endevco® model 7290D series, allowing it to be used within larger channel count applications. The model 7290D series is a high-accuracy, variable capacitance (VC) accelerometer family, offering exceptional thermal stability, reliability and performance within flight test, engine testing and other extreme temperature testing environments.

Offered in five different models with available measurement ranges from 2 g to 100 g, the patented design of the Endevco® model 7290D series (U.S. patents 4,574,327; 4,609,968; and 4,999,735) incorporates a VC sensing element with gas damping and internal over-range stops, allowing the sensor to survive significant shock and acceleration loads of up to 10,000 g, with 2.5% total dynamic accuracy.  Units feature excellent non-linearity, including hysteresis, of typically 0.2% for ranges of 2 g to 50 g.

Integral to each accelerometer is a custom signal conditioner, enabling the device to accept input voltages from 8V to 30V with a high level, low impedance output. The ±2.25 V differential output (single-ended output optional) is DC coupled at a bias of approximately 2.5V. In order to maintain stringent thermal characteristics and high accuracy, a custom ASIC provides factory programmable temperature compensation, achieved via five-point linear fit algorithm, for both thermal sensitivity and thermal zero shifts. Units are integrally temperature compensated from -55° to +125°C, to ensure temperature accuracy over the full military range.  TEDS capabilities (conforming to IEEE 1451.4) allow for onboard storage of serial number and calibration data, for simplified test setups with reduced errors.

All Endevco® model 7290D series units are shipped standard with an integral cable of customizable length. Models are also available with an optional triaxial mounting block, the Endevco® model 7990. Recommended accessories for use with the Endevco® model 7290D series include the model 136 three- channel signal conditioner; the model 4430A bridge transducer signal conditioner; or the model 4990A (Oasis) multi-rack based signal conditioning system.

Ultra low-noise remote charge converter

Meggitt Sensing Systems has announced the re-launch of Endevco® model 2771C-XX, an ultra-low noise remote charge converter (RCC), designed to facilitate even more precise measurements from piezoelectric transducers within mechanical system health monitoring, nuclear power plant/regenerative energy and environmental testing applications. This highly popular model is now being offered at a lower price and as a lower noise drop-in replacement for legacy Endevco® 2771B models or other industry equivalents.

Offered with three individually fixed gains of 0.1 mV/pC; 1.0 mV/pC; and 10 mV/pC, the model 2771C-XX offers a rugged two-wire (IEPE), single ended design operating from constant current power (4-20 mA), with a broadband noise range down to 5µ Vrms and frequency response of 0.4 to 50 kHz. Both RCC signal output and input current are carried along the same wire. Housed in a rugged, small package, units are designed to withstand shock loads of up to 100 g peak and are radiation tested to 1.0 MRads.

Because of its low impedance voltage, signal output from this unit is less susceptible to noise pick-up. Also, shunt capacitance of the cable connecting model 2771C-XX to the main signal conditioner does not significantly affect system noise or sensitivity. It can also support TEDS (per IEEE P1451.4) for smart sensor and larger channel count applications, and includes an available M1 Version with male BNC to facilitate easy panel mounting. The RCC is designed for direct compatibility with both Endevco® and other industry piezoelectric charge output accelerometers.

Piezoresistive dynamic pressure transducer

Meggitt Sensing Systems has announced the global market introduction of the Endevco® model 8510C, a rugged, miniature, high-sensitivity, high resonance gage piezoresistive pressure transducer, ideal for dynamic measurements.

Offered in ranges of 15, 50 and 100 psig with 225 mV full scale output, the Endevco® model 8510C offers high output within a very small (3.86 mm diameter face) and lightweight (2.3 grams) package. The highly rugged model 8510C pressure transducer also features excellent non-linearity of <1% to three times over-range with 4X minimum burst pressure, 20,000 g shock resistance and high stability in temperature transients. Meggitt’s Endevco® pressure transducers feature a four-arm strain gage bridge ion implanted into a silicon diaphragm, designed for a wideband frequency response.  Endevco’s unique sculptured diaphragm produces twice the sensitivity than traditional flat diaphragms resulting in improved resolution  Integral hybrid temperature compensation provides stable performance over a temperature range of -18°C to +93°C (0°F to +200°F). The Endevco® model 8510C features a 10-32 UNF-2A mounting thread and comes standard with a 30-inch integral cable, with custom lengths available upon request. Models also come standard with a vent tube that can be connected to any standard reference manifold, used for differential pressure measurements, or referenced to the ambient atmosphere.

The Endevco® model 8510C is designed for a wide variety of aerospace, automotive and industrial measurements which require a combination of small size, high sensitivity and broad frequency response. Typical applications include process control, blast testing, automotive airbag inflation testing, rocket motor analysis, jet engine inlet pressure measurements, vehicle transmission testing and hydraulics measurements. Recommended accessories include the model 136 three-channel DC signal conditioner, model 4430A bridge transducer signal conditioner or 4990A (Oasis) multi-channel signal conditioner.

Benchtop signal conditioner

Has fixed amplitude output signal and real-time front panel level meter for environmental testing and ESS applications

Meggitt Sensing Systems has introduced the Endevco® model 2775B, a high-reliability benchtop signal conditioner with fixed amplitude output signal and real-time front panel level meter, for use within environmental test laboratory, aerospace test cells, ESS, calibration systems and general vibration laboratory testing applications.

The model 2775B is designed to accept inputs from ISOTRON® (IEPE-type) transducers, piezoelectric transducers, and remote charge converters (RCCs), with a full scale input range from 0.01 to 100,000 engineering units (EU’s) and a wide sensor sensitivity input range of 0.01 to 10,000 mV/EC and RC/EU, with a gain range of 0 to 10,000 and a frequency response bandwidth of 120 kHz (-3 dB corner). Units offer AC, DC and servo outputs and operate from 90-240 VAC input power, with selectable ground isolation for cleaner data collection. With capability to install up to six units in an optional 19-inch rack accessory (model 4948A), the flexible setup of the model 2775B is accomplished either manually via the unit’s front panel, or via the unit’s integral RS232 interface using the supplied optional application software (model 35933A).  An additional filter card (model 35771) or filter with single/double integration (model 35818) is also possible.

Low-cost array mikes

Automotive, aerospace and general test & measurement applications

Meggitt Sensing Systems has announced the introduction of Endevco® models EM40PH and EM40PL, two low-cost free-field pre-polarized array microphones, designed for multi-channel acoustic measurements of sound power; sound pressure levels and frequencies; sound-field analyses; and concurrent spatial and transient measurements within the audible range in aerospace, automotive and test & measurement applications.

Endevco® models EM40PH and EM40PL offer a wide frequency range of up to 20 KHz.  The model EM40PH is offered with a high sensitivity of 50 mV/Pa and a large dynamic range of up to 135 dB, while the model EM40PL is offered with a low sensitivity of 10 mV/Pa and a large dynamic range of up to 150 dB.  Their highly durable design incorporates use of an SMB connector for ease of test setup assembly and seamless integration with most data acquisition systems. ISOTRON® (IEPE) capabilities allow Endevco® array microphones to be used interchangeably with IEPE-type accelerometers within the same test setups for added convenience. In addition, ISOTRON® microphones have no additional power supply requirements when used within standard 2-20 mA constant current powered systems. Incorporation of TEDS technology allows a microphone to be recognized by any TEDS compatible input module, allowing an analyzer to derive information about microphone type, serial number and sensitivity, which can then be read by the application software. Close manufacturing tolerances and TEDS capabilities provide models EM40PH and EM40PL with the major advantage of a high degree of interchangeability within multiple array matrices.

Endevco® models EM40PH and EM40PL are ideal for use in larger-channel count acoustic measurement applications, such as near field acoustic holography; trending and frequency analysis; white goods testing; automotive and aerospace NVH, or as a lower-cost alternative to a Type 1 compliant microphone in general acoustic testing.  Recommended accessories include the Endevco® model EM42AA handheld pistonphone calibrator and the model 133 three-channel signal conditioner.  All Endevco® acoustic sensors and instrumentation are backed by a five-year comprehensive product warranty.

Miniature high intensity piezoresistive pressure microphone

Meggitt Sensing Systems has introduced the Endevco® model 8510B, a miniature, rugged, high-sensitivity piezoresistive pressure microphone, designed for the precision measurement of high-intensity sound within a variety of demanding environments.

With available ranges of 1, 2 and 5 psig, the Endevco® model 8510B offers a 300 mV full scale output and a range of at least 100 to 190 dB SPL, in a highly rugged four-active arm strain bridge design that is diffused in a sculptured silicon diaphragm. This miniature pressure microphone offers integral temperature compensation from -18°C to +93°C (0 to +200°F), ensuring measurement accuracy over its full temperature range with excellent linearity, even at three times over-range. Units also offer high resonance frequencies for accurate measurements over the full audio range, with five times minimum burst pressure and 20,000 g shock survivability. These technical attributes make the Endevco® model 8510B the industry’s highest performing pressure microphone of its kind on the market today.

The new pressure microphone uses a 10-32 thread (metric threads available on custom order) for convenient mounting within space constrained environments, and also permits flush mounting on flat or contoured surfaces for boundary layer measurements in flight test, wind tunnels and engine inlet acoustic studies. A 30-inch integral cable is standard, with custom lengths available on request. For customer convenience, the model 8510B comes standard with a vent tube, which can be vented to the ambient atmosphere or connected to a standard reference manifold. Recommended for use with the Endevco® model 8510B are the model 136 three-channel signal conditioner, model 4430A signal conditioner, or the model 4990A (Oasis), all available from Meggitt Sensing Systems.

With its exceptional ruggedness, sensitivity and high output characteristics, the Endevco® model 8510B is ideal for use in applications such as blast testing, rocket motor acoustic studies, engine inlet acoustic studies, shock wave studies, chemical reactor monitoring and aerodynamic studies, among others.

High temp gas turbine vibration monitoring

Meggitt Sensing Systems has announced the availability of the Endevco® model 6222S series, a high-temperature piezoelectric accelerometer family, designed for high-reliability vibration monitoring in helicopter Health & Usage Monitoring Systems (HUMS); ground and onboard aircraft engine monitoring; and ground-based gas turbine engine monitoring applications.

Available in three models, with sensitivities of 20, 50 and 100 pC/g and choice of three ruggedized connector styles, the Endevco® model 6222S series offers high sensitivity and reliability in a low-profile package. Models feature the company's own proprietary Isoshear® construction, which significantly reduces transient temperature and base strain outputs, while maintaining a high mounted resonance and continuous operation in temperatures of up to +260°C (+500°F) with long Mean Time Before Failure (MTBF). The Endevco® model 6222S series comes with a standard ARINC three-point mounting configuration, three mounting bolts and is designed with a rugged two-pin 7/16-27 UNS-2A threaded receptacle with an available three-pin option. As a self-generating device, the sensors require no external power for operation.

The model 6222S series provides a balanced differential output, allowing them to be used with any industry differential charge amplifier. This unit is designed to be compatible with the Endevco® 6917B and 6917D series of shielded, softline cable assemblies.

This product family has proven industry pedigree, with more than 13,900 units shipped to date.

Expanded sensor offering

Meggitt Sensing Systems announces expanded product line offerings.

Meggitt Sensing Systems has expanded the availability of its products through the company’s San Juan Capistrano (CA US) facility, to include Meggitt’s Endevco®, Sensorex, Vibro-Meter and Wilcoxon Research product lines, all offered under one umbrella.

This recent product line inventory expansion allows customers to now order sensors and instrumentation for aerospace, automotive, industrial, R&D and test & measurement markets directly through the facility as a single source, with fully dedicated customer service, sales and applications engineering support for all product lines. Available sensing technologies include high-performance piezoelectric, piezoresistive and variable capacitance accelerometers; shock and vibration sensors; dynamic and static pressure transducers (piezoelectric and piezoresistive); acoustic sensors and related instrumentation; displacement sensors, servo accelerometers, inclinometers, inertial measurement units, LVDT’s and other position sensing technologies; portable vibration monitors for condition monitoring; electromagnetic and piezoelectric shakers; conditioners; rotating machinery vibration amplifiers; calibration systems and services, as well as a full range of compatible cables and accessories.

Acoustic measurements

New Endevco® Low-Profile Surface Microphone with Integral ISOTRON® Amplifier and TEDS

Meggitt Sensing Systems has announced the new market introduction of the Endevco® model EM40PS, a low-profile surface microphone with integral ISOTRON® (IEPE-type) amplifier and TEDS, designed to facilitate simplified larger channel count acoustic measurements on typical planar and curved surfaces exposed to air slipstreams.

The robust design of model EM40PS requires no microphone holders or stands, and incorporates a dust-free, water-repellant grid cap and a lightweight, detachable silicon rubber fairing, allowing for near-flush mounting on curvilinear surfaces and mounting pads. Models also include an integral 3.3 ft (1 m) coaxial cable with microdot connector. Units offer a nominal sensitivity of 5 mV/Pa (@ 250 Hz), wide audio frequency range from 20 Hz to 20 kHz and large dynamic range from <30 dBA to 136 dB over an operating temperature range of -20ºC to +80ºC (-4ºF to +176ºF) with low sensitivity to base bending. Because of its lightness, the EM40PS contributes very little mass to thin plates, and can be laid flat on its 2” (51mm) diameter rubber pad, or surface mounted using a double-sided adhesive pad for automotive, aeronautical, general acoustics and sound pressure level testing requirements. Pressure equalization is via a vent placed at the front of the microphone by the side of its diaphragm, important for both aircraft usage and on-road vehicle measurements in mountainous country. Close manufacturing tolerances and the advantages of TEDS enable the microphone to offer a high degree of interchangeability, precluding the need for accounting of individual characteristics.

Recommended accessories for the model EM40PS include the model EM42AA handheld pistonphone calibrator; the model 4416B constant-current power supply (2-20mA); and the model 133 signal conditioner. With its unique size and performance characteristics, the unit is ideal for measuring wind-induced noise on ground and airborne vehicles; acoustic radiation surface measurements; wind tunnel noise testing; and for making internal vs. external noise measurement comparisons on moving vehicles.

Smallest IEPE-type triaxial accelerometer

Meggitt Sensing Systems debuts world’s smallest triaxial Isotron® accelerometer

Meggitt Sensing Systems has announced the new product launch of the Endevco® model 35A, the world’s smallest ISOTRON® (IEPE-type) triaxial accelerometer with integral electronics, designed for high-precision vibration measurements in three orthogonal axes on very small objects.

Offering a low impedance output, shear mode construction and weighing just 1.1 grams without cable, the adhesive mounted Endevco® model 35A is designed as a complete measurement package to reduce the unwanted effects of mass loading on more delicate test structures. Sensor output is transmitted through the same wires that supply required 4 mA constant-current power. The model comes pre-installed with both field repairable and factory replaceable fine gage wires (34 AWG) as output leads. Model 35A includes the Endevco® model 3027AM5-120 cable with pigtails at one end to connect to the pre-installed accelerometer wires and three BNC connectors at the other end. A removal tool is also provided.

With its extremely small size, the Endevco® model 35A is ideal for the shock and vibration testing of electronic components and equipment; automotive component vibration monitoring; scale model vibration testing; and biomedical research.

Cryogenic and extreme environments

Sensors Ideal for Cryogenic, Flight Test, HALT/HASS/ESS, and Space Hardware Testing

Meggitt Sensing Systems has announced the global market debut of the Endevco® model 2271A series, an accelerometer family designed for high-reliability vibration and acceleration measurements in cryogenic and other extreme environments.

Available with either 10-32 side connector (model 2271A) or 10-32 top connector (model 2271AM20), the Endevco® model 2271A series is designed to reliably operate over a very wide operating temperature range of -269°C to +260°C (-452˚F to +500˚F) with unusually flat temperature response. Units exhibit excellent output sensitivity and stability over time, with shock survivability to 10,000 g pk. The piezoelectric sensing elements of the model 2271A series are housed in a corrosion-resistant stainless steel case, which is hermetically sealed for use in demanding environments. Signal ground is isolated from the sensor’s outer case. A three-meter (ten-foot) low-noise coaxial cable is supplied for error-free operation. As a self-generating device, the accelerometer family requires no external power source for operation. In addition, select models are eligible for purchase under the Endevco® -R replacement sensor program.

Recommended accessories for the Endevco® model 2271A series include the model 2950 triaxial mounting block; signal conditioner models 133, 2775 or 4990a (Oasis); or the model 2771C in-line charge converter. With its rugged construction and precision accuracy over an extremely wide operating temperature range, the model 2271A series is ideal for use in cryogenic testing; HALT/HASS/ESS; flight test engine monitoring; environmental testing; and space hardware evaluations.

SMT mounted accelerometers

Meggitt Sensing Systems has announced the global market launch of the Endevco® model 72 series, a new family of high-g SMT-mountable piezoresistive accelerometers designed to support a variety of high-reliability acceleration, vibration and shock measurements.

Available with a 20,000 g measurement range and a soon-to-be-released 60,000 g version, the Endevco® model 72 series offers broad frequency response, minimum zero shift post-shock event and a Class 3 Rating for electrostatic discharge protection. Its low-profile, miniature, hermetically sealed LCC package weighs just 0.16 grams for significantly minimized mass loading effects. The LCC package can be SMT mounted using production pick-and-place machines and reflow solder for easy installation.

The patented, monolithic, four-active arm bridge circuit design of the Endevco® model 72 series (US patent 6,988,412) incorporates a highly sensitive MEMS sensing element with light gas damping to attenuate resonance. Mechanical stops are included to increase ruggedness and reduce the likelihood of breakage under overload conditions, with stability and reliability to four times over-range. With a frequency response extending down to dc (steady state acceleration) and a minimum post shock zero shift, this accelerometer is ideal for measuring long duration shocks associated with a variety of automotive, aerospace and general test & measurement applications.

Recommended accessories for use with the Endevco® model 72 series include the model 136 three-channel bench top DC amplifier or model 436 three-channel rack mounted DC amplifier, both available from Meggitt Sensing Systems.

Shock accererometer

Endevco® Model 7268C miniature triaxial shock accelerometer

Meggitt Sensing Systems has announced the global market introduction of the Endevco® model 7268C, a miniature triaxial piezoresistive accelerometer designed for high-reliability measurement of short duration shock across three axes and in three orthogonal directions.

Housed within a package size measuring just 12.7 x 10.7 x 13.7 mm (0.5 x 0.42 x 0.54 in.), the Endevco® model 7268C is offered in ranges of 500g, rugged to 5,000g shock with 17k Hz resonant frequency; and 2,000g, rugged to 10,000 g shock with 26k Hz resonant frequency. Sensor frequency response is 0 to 3000 Hz on the Z-axis and 0 to 1500 Hz on the X&Y axes. The combined non-linearity and hysteresis error of the model 7268C is less than 1% FSO, making it one of the most accurate sensors of its kind on the market today. The sensor also incorporates integral mechanical stops for added ruggedness and over-range protection, with two fixed resistors, enabling shunt calibration on each axis. Units are supplied with integral cable and customer capability to select both excitation voltage and cable length.

The broad frequency response, high sensitivity and high output of the model 7268C make it ideal for use in vehicle crash testing, crash sled testing, general shock monitoring, or any other general short duration shock testing application within specified measurement ranges. In addition, the Endevco® model 7268C is covered by a five-year comprehensive product warranty.

Acoustic sensors & instruments

New line of precision acoustic sensors and instrumentation


Meggitt Sensing Systems has introduced a new line of Endevco® acoustic sensors and instrumentation, designed expressly for use in automotive NVH, cabin noise, vibro-acoustic testing, appliance noise evaluation, wind tunnel testing and other critical sound and noise measurement applications.

Endevco® prepolarized condenser measurement microphones, available in 1/8”, ¼”, and ½” diameters, are offered in free-field, pressure, low-cost array and random incidence types and can be used to meet IEC and ANSI standards. Array microphones offer a lower overall per channel measurement cost and are directly compatible with ISOTRON® (IEPE-type) signal conditioning. They can be used as drop-in replacements within existing accelerometer test system set-ups for as-needed precision noise measurements. Models may be purchased as stand-alone units, or in a microphone and low-noise preamplifier combination with iTEDS on-board memory storage capabilities, facilitating their use within larger channel count applications. All microphones are constructed with a stainless steel protective grid case and housing, as well as a special stainless steel alloy diaphragm, for high reliability in a variety of application environments.

Available for use with these precision measurement microphones are a full range of low-noise ISOTRON® preamplifiers, handheld calibrators, and accessories. In addition, all acoustic sensors and instrumentation are covered by a five-year comprehensive product warranty.

Accelerometer with digital temp compensation

Meggitt Sensing Systems has announced the global market launch of Endevco® model 7290E, a high-precision variable capacitance accelerometer with integral digital temperature compensation, designed for accurate measurement of low-frequency events and offering best-in-class thermal zero shift and sensitivity shift performance.

Available in seven different models, ranging from 2 to 150 g, the model 7290E incorporates a patented variable capacitive sensing element (US patent numbers 4,574,327; 4,609,968; and 4,999,735), with gas damping and internal over-range stops, which enable the transducer to withstand high shock and acceleration loads. Available in a wide range of excitation voltages and choice of either differential or single ended output, as well as cable length, Endevco® model 7290E offers +0.2% FSO typical non-linearity and hysteresis for most ranges, with superior frequency response, enabling the sensor to provide the highest level of measurement accuracy available on the market today, In addition, the Endevco® model 7290E is covered by a five-year comprehensive product warranty.

With its exceptional bandwidth, precision accuracy and high shock survivability, the Endevco® model 7290E is ideal for use in aircraft flight and flutter testing, automotive rough road body motion studies, suspension systems tests, railroad testing and train tilt control, centrifugal force, launch loading and acceleration, and short-term navigation. Recommended accessories for use with model 7290E include Endevco® model 136 signal conditioner and the model 7990 triaxial mounting block.

Endevco are exhibiting at Britain's leading instrumentation event Advanced Manufacturing UK in April.