High and low operating temp. accelerometers

Two new low profile, voltage mode, triaxial accelerometers from Kistler are now available with extended operating temperature ranges; up to +165°C for high temperature and down to –195°C for cryogenic applications both with a measuring range of ±500g.

The three Kistler K-Shear sensitive quartz elements in an IP68 hermetically sealed stainless steel housing, combine long term stability with wide operating frequency range and extremely low sensitivity to thermal transients and transverse acceleration. The charge signals from the three sensing elements are converted internally to low impedance voltage by a Piezotron microelectronic converter.

Because of its low mass of 11g and small size of 15.8mm square by 9.7mm high, the new sensors are especially useful for measuring on small and lightweight structures, where mass loading must be kept at a minimum. It can also be used for drop tests and finds application in a wide variety of vehicle vibration studies, modal analysis, product development and aerospace testing.

The new extended range triax accelerometers are especially suited to demanding applications encountered in the military and aerospace sectors where any error may present a life-threatening situation. Flutter testing, rocket launch pad dynamics, aircraft EMA, ammunition investigations and helicopter rotor reactions are a just few of the applications demanding the capabilities of the new products.

#Kistler #Pauto 

MEMS Capacitive Accelerometers.

The Model 2422 Series from Silicon Designs, offers low-noise, low-voltage (5 VDC) and low-cost acceleration and vibration sensing within zero-to-medium frequency instrumentation applications. 

Series models are available in eight standard ranges, from ±2 g to ±400 g. They are further offered with choice of either a ±4V differential or 0.5V to 4.5V single ended output. Series modules can reliably measure and respond to both DC and AC acceleration (0 Hz to more than 3000 Hz). Their robust design seamlessly combines both a micro-machined capacitive sense element together with a custom integrated circuit. Series internals are packaged within a lightweight, epoxy sealed, and rugged anodized aluminum case, further terminating in a 3-foot integral shielded cable. Units are relatively insensitive to temperature changes and gradients over a range of -55°C to +125°C.

The low-noise internal MEMS capacitive sense element contained within the Model 2422 Series is 100% designed and manufactured at Silicon Designs global corporate headquarters and R&D centre. As the OEM of its own MEMS capacitive sense elements, Silicon Designs is able to carefully regulate its own R&D and manufacturing processes, thereby ensuring that each Model 2422 Series module is manufactured to be virtually identical within any given g-range. It also allows Silicon Designs to offer a standard product range with both long-term stability and enhanced bias and scale factor over temperature performance specifications that are unmatched. All Silicon Designs MEMS capacitive accelerometers are in-house tested, programmed, calibrated, and verified to ensure their utmost measurement accuracy and reliability. They are also fully serialized for traceability before shipment.

In addition to its Model 2422 Series, Silicon Designs offers a specialty hermetic model variation, the 2422H Series, also as standard product. The Model 2422H Series incorporates all of the same low-noise, high-performance internal components as its non-hermetic counterpart, with the additions of enhanced temperature compensation; a rugged, IP67 rated, hermetically sealed lightweight titanium housing; and IP61 rated connector. These added features afford the accelerometer module added protection from moisture, dust, corrosion, and contaminants, all of which can affect measurement integrity. Other standard and custom accelerometer design modifications are available upon request. Please consult the factory for details.

The Model 2422 Series is ideal for the support of a variety of in-laboratory zero-to-medium frequency instrumentation requirements in automotive, aerospace, industrial, power generation, and test and measurement, and particularly, where low-noise, a +5 VDC regulated power supply, and long-term stability are needed.

#SiliconDesigns #PAuto 

Distributor for Turkey.

Silicon Designs has announced the appointment of the Istanbul-based Elektro Elektronik San Ve Tic As (Elektro) as its exclusive authorized distributor in Turkey for all of the company’s product lines (MEMS capacitive accelerometers and chips) effective June 2020.

Since 1979, Elektro has been supplying semiconductor, passive, and electromechanical components, including sensors, switches, and inertial measurement units, to aerospace, OEM, and industrial equipment customers in Turkey, and via its role as experienced technical sales representatives for some of the industry’s top manufacturers. In addition, Elektro is both an ISO 9001 and TRACE certified manufacturer of its own product technologies.

#SDI #Elektro @EmbassyGlobal #Pauto 

Capacitive Accelerometers.

Silicon Designs has announced its high-performance, Model 2276 Series for zero-to-medium frequency aerospace and automotive testing, industrial vibration monitoring and robotics instrumentation applications.

Available in eight standard ranges from ±2 g to ±400 g, the single-axis Model 2276 Series combines an integrated low-noise, nitrogen-damped, fully calibrated MEMS capacitive accelerometer chip together with high-drive, low-impedance buffering. Sense elements are contained within an epoxy-sealed, rugged anodized aluminum housing. This design allows the Series to reliably withstand shock inputs of up to 5000 g, as well as standard operating temperature ranges from –55°C to +125°C. The accelerometers further offer superior bias performance, including a temperature shift coefficient of -100 to +100 PPM of span/°C, and a scale factor temperature shift coefficient of -150 to +50 PPM/°C. Model 2276 Series accelerometers respond to both DC and AC acceleration, with choice of either two analog ±4 V (differential); or 0.5 to 4.5 V (single-ended) outputs, both of which vary with acceleration. At zero acceleration, output differential voltage is nominally 0 VDC (DC response). Onboard voltage regulation also minimizes supply voltage variation effects.

All Silicon Designs MEMS capacitive accelerometers and chips, including dies, are 100% designed, manufactured, assembled and tested at the company’s state-of-the-art global corporate headquarters and R&D center, located just outside of Seattle, Washington. Each module is serialized for traceability and fully calibrated prior to shipment.

The high-performance, low-impedance design of the Model 2276 Series is ideal for vibration and acceleration measurements within industrial and commercial environments, particularly in applications where an accelerometer’s low mass (9 g) and small size (0.94" by 0.63" by 0.425") can help to minimize mass loading effects on the test article. Typical applications include aircraft flight and flutter testing, automotive RLDA, industrial vibration monitoring and analysis, robotics, biomechanics, industrial machinery and equipment control, modal and structural analysis, crash event detection, and general in-laboratory testing.

 #SDI @EmbassyGlobal #Pauto #Testing 

Wireless accelerometer.

Wireless accelerometer according to LoRaWAN™ specification with edge computing for condition monitoring minimizes downtime, maximizes availability and reduces installation costs

Scalable, reliable and more compact wireless sensors for remote condition monitoring help companies get the most from their assets by minimizing downtime, maximizing availability and reducing installation costs. Further, enhanced condition monitoring systems are key to improving the uptime of machinery. To provide this level of performance in critical machinery in industrial applications, TE Connectivity has designed the 8911 wireless accelerometer.

The 8911 is a compact, LoRaWAN™ wireless accelerometer with edge computing for condition monitoring.

Key benefits of the 8911 wireless accelerometer include:

• LoRaWAN™ Class A: The LoRaWAN™ specification is a low power, wide area networking protocol designed to wirelessly connect battery operated devices to the internet. This protocol provides longer transmission distance and is less susceptible to external signal interference. It also offers secure means of expanding condition-based maintenance into plant areas where the cost to install wired systems is prohibitive, making data available to existing process control and information systems. LoRaWAN™ can be implemented on a managed network or on a customer’s own private network.
• Edge computing: The 8911 wireless accelerometer provides ambient temperature and calculates FFTs in the device. It transmits the relevant top eight peak frequencies and combines a sensor, data collector and a LoRaWAN™ radio into one compact, battery-operated device.
• Compact: The 8911 wireless accelerometer is designed with a corrosion resistant stainless steel case and plastic cover measuring 1.25” hex x 3.1” height, the same as existing cable versions. Its mounting footprint and stud size are standard to enable fast installation on existing and new machinery.
• Reliable: Robust signal preventing interference and drop out. The rugged stainless steel sensor housing with IP66 rated o-ring seal allows the sensor to perform well in harsh environments.
• 10-Year battery life: This sensor has up to 10 years of battery life based on a certain sampling interval. It uses a piezo-electric sensing element, which has the advantage of high bandwidth, superior measurement resolution and ultra-low power vs MEMS solutions, enabling longer battery life and enhanced machine failure detection.

“The 8911 wireless accelerometer combines a sensor, data collector, digital signal processor, and radio into one compact, battery-operated device that measures both vibration and temperature data,” said Bjorn Ryden, director of product management for TE’s sensors business. “We are confident that our customers will benefit from this product and be impressed by its ability to provide top performance in continuous health monitoring of critical industrial machinery.”

#PAuto @TEConnectivity 

Accelerometer calibration.

MB Dynamics (MB) has announced the global market launch of its Win475 MULTI-DUT CRASH-CAL (MDCC) automated accelerometer calibration system.

The MB Dynamics Win475 MDCC increases metrology center throughput and productivity by facilitating the accurate, efficient, and simultaneous automated calibrations of up to eight (8) single axis piezoresistive accelerometers (DUT’s) of the same model and type, over a frequency range of 10 to 4000 Hz, complying with SAEJ211, SAE2570, and other global automotive industry test standards. Its versatile design further supports the automated single calibrations of non-piezoresistive DUT’s, including piezoelectric, IEPE, voltage and velocity sensors, over frequencies from 5 Hz to 15 kHz. These combined features can help calibration technicians to achieve a measurable 70%-time savings over single-DUT calibration methods with greater accuracy and repeatability.

As a complete turnkey system, the industry-exclusive design of the Win 475 MDCC automated accelerometer calibration system seamlessly integrates MB’s own Model CAL25AB air bearing exciter, together with its Model 407-8X multi-channel signal conditioner; MB 500VI power amplifier; and proprietary MB Win475 MDCC software, further supported by an industry standard NI DAQ card.

Other system components include an internal removable reference (REF) accelerometer with 100 mV/g sensitivity and usable frequency range to 15 kHz, further traceable to national standards and ISO 17025; an eight-DUT test instrument mounting fixture (TIMF) adaptor plate; a single-DUT TIMF; a 475PCM module; a Windows 10 PC, monitor, keyboard and printer; a calibration accessory kit; user manuals; and system installation, start-up and training support.

As a multi-DUT automated calibration system, the MB Win475 MDCC quickly and efficiently measures and saves relevant accelerometer characteristics, such as ZMO, Zin and Zout, as well as input & output impedance values. Its versatility and flexibility allow an end-user to choose from among seven (7) individual (six internal, one external) high-precision resistors for shunt calibration. The system also reads onboard sensor electronic identifications, such as 1-Wire Dallas ID memory chips or TEDS piezoelectric accelerometers (per IEEE 1451). The MB MDCC system may be further integrated into customer-specified databases for additional automation capabilities with reduced calibration data transference errors.

The automation afforded by the MB Win475 MDCC mitigates the risks of human errors inherent to manual accelerometer calibration systems, thereby freeing up technicians for other measurement tasks. The increased frequency of accelerometer calibrations afforded by system further helps technicians to improve in-laboratory test data quality and productivity while reducing documentation errors. The system has proven especially useful within crash test and automotive safety test laboratory environments, in applications where larger volumes of piezoresistive accelerometers are in use, therefore requiring more frequent recalibrations. In addition, the MB Win475 MDCC provides a number of value-added end-user benefits, including bottom-line cost savings, with its elimination of outsourced calibration service needs; implementations of more efficient and effective in-house calibration processes; and simplifications of internal record-keeping accuracy, further aiding in ISO audit compliance.

The Win475 MDCC automated accelerometer calibration system is also accompanied by full technical support, with in-house customer training provided by the 40-year calibration experts at MB Dynamics.

#Automotive @MBDynamics @EmbassyGlobal

High temperature accelerometer.

Kistler has added the world’s first high temperature accelerometer to its pressure sensor for the monitoring of gas turbines. Both the new accelerometers and pressure sensors are designed for long-term use at up to 700°C and are certified in accordance with the European ATEX guide lines for explosion prevention (Ex-nA and Ex-ia). The piezoelectric accelerometer is not pyroelectric and does not show any moisture-induced stress (popcorn effect) offering manufacturers and operators of gas turbines new options for monitoring the combustion stability.

Pic: Kistler Group

The efficient and secure operation of gas turbines relies upon stable combustion processes. These have to comply with increasingly strict regulations, including flexible operation on different fuels and minimal emissions. At the same time, there is an associated risk of unstable combustion processes and pressure pulsations. Reliable and continuous monitoring systems are required to monitor and control these combustion processes.

The new high temperature accelerometer from Kistler is the only accelerometer designed for permanent operation with a lifespan of three to five years at temperatures up to 700° C. The patented PiezoStar crystal technology from Kistler used in the new sensor is neither pyroelectric nor does it produce any popcorn effects. As a result, the sensor is highly reliable and generates high-quality signals for the interference-free monitoring of combustion dynamics.

The Swiss-made sensor completes the modular thermoacoustic portfolio from Kistler, including pressure sensors and accelerometers for long-term monitoring of gas turbines and combustion dynamics in high temperature surroundings. Both high temperature sensors from Kistler are certified in accordance with the European ATEX guide- lines for explosion prevention (Ex-nA and Ex-ia).

#Kistler #PAuto

Accelerometer modules.

Silicon Designs (SDI) has introduced its Model 2422H low-voltage, specialty hermetic, MEMS variable capacitive accelerometer modules.

Available in eight unique models, with standard ranges from ±2 g to ±400 g, the Model 2422H series is expressly designed for zero-to-medium frequency vibration and acceleration sensing, in commercial and industrial applications where a hermetically sealed case and +5 VDC regulated power supply are absolute requirements. Design of the Model 2422H series incorporates Silicon Designs’ own MEMS accelerometer chip, for an enhanced bias and scale factor over temperature performance specification that is unmatched in the industry, along with excellent long-term stability. Modules are packaged in a rugged, IP67 rated, hermetically sealed lightweight titanium case, for added protection from moisture, dust, corrosion, and other contaminants. Units are easily mounted via two screws, adhesive, or a magnet. The IP61 rated connector of the Model 2422H meets IP67 requirements when sealed with a boot, sleeve, or heat shrink.

The Model 2422H series produces differential analog output voltage pairs (AON & AOP) which vary with acceleration. Signal outputs are fully differential about a common mode voltage of approximately 2.5V. Modules can support either a ±4V differential or 0.5V to 4.5V single ended output, for complete measurement flexibility. They can also respond to both DC and AC (0 to 2000+ Hz) acceleration. At zero acceleration, differential voltage output is nominally 0 VDC; at ± full-scale acceleration, it is ±4 VDC. Units are also relatively insensitive to temperature changes and gradients over a standard operating temperature range of -55°C to +125°C. Each accelerometer module is shipped directly from the factory fully calibrated and serialized for traceability.

All of Silicon Designs MEMS variable capacitive accelerometers and chips are 100% designed, manufactured, and tested at the company’s state-of-the-art facility in Kirkland, Washington, USA. This includes the manufacture of the chips and dies themselves. The completely vertically integrated manufacturing processes of Silicon Designs allow the company to offer high-quality products at still-highly competitive pricing, along with some of the industry’s shortest lead times. Standard model quantities can typically ship in less than two weeks.

#SiliconDesigns #Pauto

Dynamic tilt.

A new MEMS based, MTLT305D Dynamic Tilt Sensor Module has been launched by ACEINNA. It combines accelerometers, gyroscopes and a temperature sensor with advanced calibration and correction algorithms to provide accurate 3D acceleration, 3D rate and Pitch and Roll measurement in dynamic, moving vehicle applications.

The MTLT305D uses advanced sensor fusion (Extended Kalman Filtering) and calibration algorithms to achieve 0.5 degree tilt and <10 milli-g acceleration accuracy in a wide variety of dynamic conditions. It is calibrated to accurately operate over a wide temperature range of -40C to +85C. The completely sealed compact module (65 x 66 x 27 mm) with integrated connector is perfect for rugged construction, off road and agriculture applications. It offers high reliability, MTBF >50k hours and is ITAR- Free

It includes CAN J1939 and RS232 interfaces for network connectivity. The miniature plastic housing is durable under hazardous environments (IP68 and IP69K ratings). It includes an Ampseal 16, 6 position connector and supports a wide 4.9 V to 32 V supply input range (qualified for use in both 12 V and 24 V vehicle platforms).

“This new Dynamic Tilt Sensor Module provides the best performance for the price in the industry,” says Mike Horton*, CTO of ACEINNA. “Not only is the MTLT extremely compact compared to competing modules, it is extremely rugged, well qualified and inexpensive.”

Easy to integrate, the MTLT305D supports industry standard SAE J1939 messaging over the CAN bus, and the included ACEINNA NAV-VIEW software provides simple to use graphical interface to display, record, playback, and analyze all the MTLT305D parameters over the RS232 port. NAV-VIEW can also be used to set a wide range of user-configurable fields in the MTLT305D to optimize the system performance for various dynamic applications.

* See also Mike Horton's article, Inertial Measurement Unit – essential in self-driving cars! (26/5/2018)

@MEMSsensortech #PAuto #Automotive 

Low-Mass VC Response Accelerometers.

Silicon Designs has announced the recently enhanced performance of its compact, low-mass, single axis Model 2220 series.

Design of the enhanced Model 2220 series incorporates Silicon Designs’ new proprietary high-performance MEMS chip, along with high-drive, low-impedance buffering, for industry-exclusive improved bias and scale factor over temperature performance. These specifications are unmatched among other industry MEMS VC accelerometer manufacturers yet are still offered by Silicon Designs at a highly competitive price point.

The Model 2220 series is available in seven unique models, with standard measurement ranges from ±2 g to ±200 g, each with a wide frequency response measuring down to zero hertz. Each accelerometer module is housed within an epoxy-sealed rugged anodized aluminum housing, with mounting via two M3 screws. Its lower mass (10 g) and compact size (1" x 1" x 0.3") can help to minimize mass loading effects, making it ideal for zero-to-medium frequency acceleration and vibration measurements within a variety of industrial and commercial applications. The Silicon Designs Model 2220 series can respond to both DC and AC acceleration, either with two analog ±4V (differential); or 0.5 to 4.5V (single-ended) outputs that vary with acceleration. At zero acceleration, differential voltage output is nominally 0 VDC (DC response), with typical 1% cross-axis sensitivity. Onboard voltage regulation minimizes supply variation effects. Units are designed to withstand shock inputs of up to 2000 g over a standard temperature range of –55°C to +125°C. Each module is serialized for traceability and calibrated prior to factory shipment.

The combined low mass, small dimensional size, and low-impedance outputs of the Model 2220 make the series particularly ideal for flight test, aircraft flutter testing, vibration monitoring and analysis, robotics, biomechanics, automotive RLDA, machinery and equipment control, modal analysis, crash testing, and general in-laboratory applications. Non-standard g ranges, packages and connector configurations are available upon request.

#Silicon_Designs #Pauto @EmbassyGlobal 

Triaxial accelerometer.

If you need a triaxial accelerometer that combines wide frequency range from, DC to 2kHz with exceptionally low noise, the choice has been very limited until now.

The new Type 8396A triax from Kistler has those characteristics plus excellent linearity and an integral signal amplifier for an analog voltage output all in a miniature, titanium housing weighing only 30 grams. With six ranges from 2g to 200g these new MEMS accelerometers are the answer to most demanding applications from automotive durability testing and road load data and aviation flutter testing to bridge structural monitoring and railway rolling stock testing and monitoring.

The new Type 8396A accelerometer uses a MEMS variable capacitance, silicon sensing element to simultaneously measures acceleration and/or low-frequency vibration in three mutually perpendicular axes from DC to 2,000Hz. The integrated signal amplifier provides a wide range of industry standard output signals options to interface with most current DAQ systems. The sensing element and electronics are contained in a lightweight, hermetically sealed, welded titanium housing with either a circular 9 pin connector or an integral cable. Ground isolation is obtained by mounting the sensor using one of range off-ground accessories or by adhesive mounting using the side of the sensor with the integral hard anodized plate.

The combination of wide frequency range, low noise and operating temperature from -55°C to +125°C combined with small size and mass make the new Type 8396A triaxial accelerometer ideal for applications wherever very low frequency measurements need to be made accurately, even under varying temperatures in exposed, outdoor environments.

#Kistler #Transport #PAuto

• You may also be interested in reading: Bob Lally – Piezoelectric sensing technology pioneer.

MEMS Capacitive Accelerometers.

Silicon Designs, Inc. has introduced six new series of low-cost, high-performance MEMS capacitive accelerometers, in both traditional and smaller footprints.

These include the single axis Model 2220 or triaxial Model 2470, featuring aluminum housings and a standard 1 meter integral cable; the single axis Model 2240 or triaxial Model 2480, featuring hermetically sealed titanium housings and an integral connector; and the single axis Model 2276 or triaxial Model 2476, featuring aluminum housings and an integral connector. Each model is offered in full-scale standard ranges from ±2 g to ±400 g, along with choice of ±4V differential or 0.5V to 4.5V single ended output. Their expanded temperature performance to +125°C, as well as improved scale factor and bias temperature shifts, allows them to provide excellent long-term stability with an industry-best-in-class price-for-performance ratio. The accelerometers are also relatively insensitive to temperature changes and gradients.

Depending upon selected model, units feature a simple four-wire (single axis) or eight-wire (triaxial) connection; flexible response to either DC or AC acceleration (0-2000 Hz); low-impedance outputs, supporting up to 2000 feet of cable; and flexible operation from +8 to +32 VDC power. Each device is marked on its top and bottom surfaces with a serial number for traceability. A calibration test sheet is supplied with each unit, showing measured bias, scale factor, linearity, operating current, and frequency response. A simple test sequence, using the earth’s gravity, may be used to verify operation and calibration. 

#SDI #PAuto

Miniature triaxial accelerometer.

The new Type 8766A lightweight, triaxial accelerometer from Kistler Instruments uses the, patented PiezoStar® crystal developed by Kistler to provide ultra-stable performance with very little sensitivity deviation with temperature changes. Over a temperature range of -50°C to +165°C a PiezoStar® sensor has a sensitivity deviation with temperature which is over thirty times better than a similar quartz sensor. The Temperature Coefficient of Sensitivity of a quartz triaxial accelerometer is 0.18 %/°C, compared with only 0.005 %/°C for a 250g measurement range for the new PiezoStar triaxial accelerometer.

The new accelerometer has been designed specifically to bring these unique properties to applications demanding high accuracy measurements in varying temperature up to 165°C. The small cubical, hermetic titanium housing has threaded mounting holes on each of three sides to facilitate calibration and simplify installation for tests whilst the low mass of only 4g reduces any influence on the test structure. The Kistler PiezoStar® shear element design provides a flat frequency response over a wide operating frequency range and extremely low sensitivity to temperature changes.

The IEPE sensor combines the PiezoStar® crystal with high gain, integral, hybrid microelectronics to achieve very low sensitivity variation over the wide operating temperature range, compared to other sensing element designs, and high immunity to base strain errors. The Transducer Electronic Datasheet (TEDS), embedded in the chips integrated within the IEPE sensor, enable data acquisition systems to automatically recognize the sensor specification and so reduce set up time, minimise risk of human errors and eliminate the need for manual point-to-point connection identification.

Five variants cover the measurement range from ±50g to ±1,000g all with a 100% overload capability plus a high temperature option for temperatures of up to 165°C. In contrast to ceramic and quartz, the extremely stiff piezoelectric crystal sensing element offers a flat frequency response with no slope across the entire useable frequency range of 0.5 to 20,000 Hz.

The accelerometer uses a welded titanium construction for low mass and an industry standard 4 pin connector, as well as a mini 4 pin connector option for lower mass and wider frequency operation. All variations provide reliable measurements and long-term stability, especially at higher operating temperatures. The miniaturized light-weight measuring element in a hermetic titanium housing which has threaded mounting holes on each of the three axes to simplify cable connection and minimise unwanted cable loops. A range of ground isolated mounting bases are available with adhesive, threaded and magnetic mounting options and an integral silicone cable variant is available for underwater vibration testing at up to 10 bars (150 psi).

With its extremely wide and flat frequency response, the unique Type 8766A accelerometer from Kistler instruments is ideal for use in modal and durability testing applications at widely varying temperatures.

#Kistler #PAuto 

Very cool precision accelerometer.

The new Type 8712B high sensitivity, voltage mode accelerometer from Kistler Instruments is designed to operate reliably at cryogenic temperatures as low as the -196°C (minus 196°C) needed by many aerospace applications.

With its range of ±5g and high 1,000mV/g sensitivity, the new accelerometer is ideally suited to applications involving low amplitude vibrations over a wide frequency range. On large structures, low amplitude vibrations as low as 100μg can be measured accurately and reliably over the long term. Typical applications include microvibration testing in spacecraft, seismic and any low amplitude vibration testing on heavy structures.

Their exclusive PiezoStar® sensing element and K-Shear® design combination produces an accelerometer with very low sensitivity to base strain, thermal changes and transverse acceleration. The unique sensing elements provide long-term stability, which ensures repeatable and accurate measurements for many years. In addition to the PiezoStar® shear elements contained within the titanium hermetic housing, integrated Piezotron® micro-electronics convert the high impedance charge signal into a ±5V signal. This low impedance voltage output minimizes noise pick-up and eliminates the need for highly insulated low noise cables.

The Type 8712B accelerometer can be attached to any clean and flat surface on a structure by a single threaded hole on the base of the sensor. Signal Conditioning & Data Acquisition can be provided by the Kistler LabAmp Type 5165A or any IEPE Compatible Data Acquisition equipment.

The rugged, welded, hermetic construction makes the new accelerometer ideally suited for accurate long term measurements in adverse conditions down to cryogenic temperatures.

#Kistler #PAuto

Low-noise single axis accelerometer.

Silicon Designs has announced the added versatility of its Model 2210 Series, to include measurement capabilities on one, two, or three orthogonal axes.

Low-noise single axis Model 2210 accelerometer modules integrate a MEMS VC accelerometer chip with high-drive, low-impedance buffering for reliable, repeatable measurements. When used with a Silicon Designs mounting block, such as the Model 2330-BLK, the new accelerometer can effectively measure on either one, two, or three axes, allowing for the specification of a single part number for multiple requirements, thereby reducing in-house inventory counts.

Offered in ranges from ±2 to ±400 g, the Silicon Designs Model 2210 Series generates two analog voltage outputs which vary in response to applied acceleration. Customers can utilize either single-ended or differential output, the latter of which doubles accelerometer sensitivity over single-ended versions. The sensitive axis of the Model 2210 is perpendicular to the package bottom, with positive acceleration defined as a force pushing on the bottom of that package. Output scale factor is independent from the supply voltage of +8 to +32V. At zero acceleration, differential output voltage is nominally 0 VDC; at full scale, ±4 VDC.

Sensing elements of the Model 2210 are packaged within a compact, lightweight, anodized epoxy sealed aluminum housing, occupying a total footprint of just one square inch. Their design features a simple-yet-robust four-wire connection and internal voltage regulator, which minimizes supply voltage variation effects. Units are relatively insensitive to temperature changes and feature quick, easy self-calibration. All Silicon Designs accelerometer modules and chips are 100% designed, developed and manufactured at the company’s global corporate headquarters and MEMS fabrication facility near Seattle, Washington, USA. Each unit undergoes rigorous quality testing prior to shipment.

Model 2210 MEMS VC accelerometer modules are ideal for lower frequency vibration testing requirements, including vibration analysis, machinery control, modal analysis, robotics and crash testing. With their versatile design and performance reliability, they may be specified within a variety of aerospace, automotive, defense, energy, industrial, and test & measurement applications.

#Silicondesigns #PAuto 

Sensors for show!

Kistler Instruments will be launching several new products at the Sensors & Instrumentation Event (28-29/9/2016) in Birmingham (GB) including:

Dual Range Torque Sensor Type 4503B

Dual Range Torque Sensor Type 4503B with built-in speed sensor and integral, digital measurement conditioning system with analog and digital output signals. The standard range is 0.2 – 5000 Nm with a second range of 1:10 or 1:5 of the rated range.

Miniature ceramic shear accelerometers weighing less than 3.5 gm with four measuring ranges from ±50 g to ±500 g each with a choice of four mounting options.

New measuring flange for the KiTorq torque measuring system available in seven measuring ranges from ±50 Nm to ±5000 Nm.

#Kistler #PAuto #SensorsInstBham

Calibrating human vibration accelerometers!

Svantek has launched a new portable vibration calibrator. The hand-held SV110 is designed for verification of machine sensors as well as on-site checks of human vibration accelerometers, in accordance to ISO 8041.

Specially developed for in-situ calibration checks of hand-arm vibration meters mounted on hand or tool, the robust SV110 is ideal for use with Svantek’s popular SV103 and SV106 instruments.

With its compact design, the SV110 enables easy checks of sensors. Depending on the selected frequency (79.58 Hz and 159.2 Hz), the user may select the level of calibration from 1m/s² to 10m/s². Accelerometers are conveniently attached using mounting stud or disc, or via a dedicated adapter.

The calibrator menu provides selection between both metric systems ‘g’ and ‘m/s². The menu is simply operated by three push buttons and small OLED display.

Following the requirements of ISO 8041, the calibrator’s built-in reference accelerometer measures the cross-axis (transverse) vibrations to detect any disturbance to the calibration signal. Faults caused by transverse vibrations are indicated by two LEDs on the calibrator’s outer casing.

This innovative solution ensures stability of both the calibration level and frequency, independent from the mass of the test object.

Svantek’s SV110 portable vibration calibrator boasts built-in rechargeable batteries for 12 hours of continuous operation.

@Svantek_UK #PAuto 

Miniature IEPE triaxial accelerometer.

The new sensor from Kistler Instruments is a miniature, through hole triaxial accelerometer available with measurement ranges of ±50g and ±100g designed for dynamic vibration measurements, especially where space is limited. Full scale signal output is ±5V for both ranges. Applications include automotive NVH and durability, space and aerospace vehicle testing and subsystem vibration testing.

The Kistler ceramic shear element technology ensures high immunity to base strain and the low mass, 6 gram, minimises any effect on the item under test. The welded titanium through hole fixing housing is hermetically sealed and M4.5 and ¼-28 miniature 4 pin connector options allow 360° cable orientation for maximum installation flexibility.

The IEPE (Integrated Electronics Piezoelectric) design with the TEDS (Transducer Electronic Data sheet) option delivers small size, light weight, robustness and low cabling costs whilst the aluminium anodized base ensures ground isolation from mounting surfaces.

The slim profile, base isolation, light weight and wide frequency response in the three orthogonal directions combined with centre-hole mounting flexibility for 360° cable orientation make the new Type 8764B accelerometers easy to install where space is restricted and the robust welded titanium construction ensures a long life in hostile environments.

 #Kistler #PAuto

No mean feat for an accelerometer!

Packing a 1000g triaxial capability with integrated signal conditioning into a miniature, titanium cube accelerometer weighing less than four grams is no mean feat but that is what Kistler Instruments has achieved with the latest addition to its PiezoStar® family.

The new accelerometer has exceptionally low thermal sensitivity shift combined with a flat frequency response across the entire 0.5 to 10,000Hz frequency range to provide versatile, high-accuracy measuring in changing temperatures from -54°C to 165°C. The Kistler’s PiezoStar® shear crystal sensing element gives very low sensitivity variation over the wide operating temperature range, compared with quartz and ceramic sensing elements.

The hermitically sealed, welded titanium, ground isolated, IP68 housing permits operation in harsh, dirty or wet environments. A TEDS (Transducer Electronics Data Sheet) option is available to simplify installation and set-up. Mounting by a central mounting hole tapped 6-32 UNC on each of three sides of the cube design gives maximum adapterless mounting flexibility and allows the miniature 4-pin ceramic connector to be positioned throughout 360 degrees for convenient cable orientation.

The new accelerometer can be powered by any Kistler power supply coupler or industry standard IEPE (Integrated Electronic Piezoelectric) compatible power source.

With its extremely wide and flat frequency response this unique accelerometer is designed for use in modal and durability testing of automotive, aviation and aerospace structures at high temperatures. It is equipped with a voltage output (IEPE) and a range of insulated adapters is available.

Calibration accelerometer!

The new Type 8080 back-to-back vibration calibration standard accelerometer from Kistler,  uses an innovative PiezoStar® based sensing element, first of its kind for a back to back sensor, which combines very good transient response with very low case/base strain sensitivity and a 50g range. The accelerometer is designed specifically for use as a transfer standard for calibrating accelerometers and is equally suited to laboratory and field applications.

The new accelerometer is the company's most accurate and repeatable low impedance, back-to-back, vibration calibration standard and features low base strain, long-term and thermal stability and high frequency response. Due to its unique shear design, it offers minimum sensitivity to shaker lateral rotation (rocking motion). A beryllium mounting base, lapped optically flat, provides optimum coupling between Type 8080 and the accelerometer being calibrated. Contained within the housing is a piezoelectric system consisting of a seismic mass preloaded to a PiezoStar element and miniature hybrid electronics. This combination yields a high level, low impedance voltage output signal proportional to the accelerating stimulus.

This PiezoStar® based sensing element offers long-term thermal stability from −65oC to 120oC, and is superior to quartz in terms of voltage gain/noise. The high rigidity provides a frequency response flat to within ±5 % from 1 Hz up to 10 kHz. The shear design, first of its kind for back-to-back sensors, combines an excellent transient response with very low case/base strain sensitivity and a ground isolated interface to shaker. Both signal and DC excitation power are connected through a single coaxial cable.