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Vol. 58, No. 8, August 2005




Table of Contents










Practical Circuits and Interface Techniques for MEMS Accelerometers with Quasi-Digital Output


The application specific paper describes a practical circuits and interface techniques for quasi-digital MEMS accelerometers. This design approach is based on the Universal Frequency-to-Digital Converter (UFDC-1) working well with any frequency-time domain sensors. Such approach lets significantly simplify the design process, reduce time-to-market and production price and produce data acquisition and sensor systems with high metrological performances. Practical examples of direct interfacing of quasi-digital accelerometers to the UFDC-1 are given.


Prof., Dr. Sergey Y. Yurish,

National University Lviv Polytechnic,

Bandera str., 12, 79013 Lviv, UA

Phone: +380 502280003, fax: +380 32 2971641

E-mail: syurish@mail.lviv.ua





Rugged Triaxial Seismic Accelerometer


Chatsworth, CA. Dytran Instruments, Inc. offers a rugged triaxial seismic accelerometer at an affordable price. Called the model 3233A, this accelerometer permits the measurement of three orthogonal axes simultaneously with a single unit. The hermetically sealed 3233A accelerometer features ground isolation and is constructed of rugged welded titanium with thru-hole bolt mounting. Sensitivity is 1000mV/g with a frequency response of 0.4 to 3000 Hz. Built-in signal conditioning provides a low impedance voltage output. The robust package makes this accelerometer suitable for both field and laboratory applications.


Applications include floor vibration measurements, structural testing, low frequency low amplitude vibration testing and low frequency modal analysis.



Bruce B.  Lent,

Dytran Instruments, Inc.

21592 Marilla Street, Chatsworth, CA 91311

Tel:  818.700.7818, fax:  818-700-7880

E-mail: Blent@dytran.com

Triaxial seismic accelerometer 3233A



ATEX / CSA Intrinsically Safe Vibration Transmitters


August 4, 2005, Depew, NY-The IMI Sensors Division of PCB Piezotronics, Inc. introduces a new line of 4 to 20 mA vibration transmitters with intrinsic certifications for monitoring of critical machines. These intrinsically safe sensors comply to ATEX and CSA North American standards and are used to monitor critical rotating machinery in refineries, grain processing facilities, or mines where hazardous gas or dust may be present, thus requiring this safety certification.


The 4 to 20 mA transmitters are loop powered and can be conveniently interfaced with existing plant monitoring equipment such as PLC, DCS, or SCADA systems. Standard features include hermetic sealing, frequency response from 180 to 600,000 cpm (3 to 10 kHz), stainless steel construction, Вј-28 or M6 mounting hardware, temperature 40 to +185 °F (-40 to +85 °C). Standard sensors provide the choice of acceleration or velocity output signals and in either RMS or peak versions. Optional temperature or analog output is available. The analog vibration option gives a technician the ability to perform detailed signal analysis.


Eric Yax,

Division Manager

IMI Sensors Division

3425 Walden Avenue, Depew, NY 14043-2495

Tel: (800) 959-4464 ext. 2377, fax: (716) 684-3823

E-mail: eyax@pcb.com

Vibration transmitters



Inductive Proximity Sensors Get Into Game


Frankfort, New York, August 1, 2005 - A new family of device-level components build-out the automation playing field lineup. Right angle style, Banking Screw Adapters, allow non-contact sensors to stop heavy loads and sense around corners to deliver mission critical control signals to their quarterbacking PLC’s and PC’s. With this announcement, both sensor and switch specifies gain new design options as SoftNoze takes an increasing number of non-contact inductive proximity sensors off the sidelines and into the game of full-contact industrial automation.

SoftNoze USA, Inc.

Rajendra Mahich

Tel: (315)732-2726 ext. 27

E-mail: rmahich@softnoze.com


Inductive Proximity Sensors



Multipurpose, ICP® Industrial Force Monitoring Sensors


August 4, 2005, Depew, NY, USA - Multipurpose, ICP® piezoelectric sensors from the Force/Torque Division of PCB Piezotronics, Inc., utilize piezoelectric quartz sensing elements and ICP® technology to measure dynamic and quasi-static forces on machinery structures. ICP® piezoelectric sensors feature high rigidity and have no moving parts inside them, thus are not susceptible to fatigue or changes in sensitivity over millions of cycles. They are therefore ideal for industrial process control and product quality assurance applications which require measurement of repetitive cycles. In typical applications, upper and lower control limits are set to follow a desired force curve for the process, and if the actual force curve deviates from the pre-set control limits, the process is shut down. This prevents the acceptance of non-conforming parts as finished goods.


Applications include clinching, crimping, metal forming, plastic injection molding, pressing, punching, spot welding, stamping, and automated assembly operations. PCB® General Purpose ICP® Force Sensors, Force Rings, Force Links, and Strain Sensors are easy to install, and can be powered by any ICP® sensor signal conditioner.


Peter Munschauer,

Division Manager, Force/Torque Division,

3425 Walden Avenue, Depew, NY 14043-2495 USA

Tel: (888) 684-0004 ext. 2405, fax: (716) 684-8877

E-mail: pmunschauer@pcb.com

Force sensors



Photoelectric Sensor for Hopper Level Control Application


Shiva Electronics has developed a new Photoelectric Sensor for Hopper Level Control application. The sensor uses invisible infrared light beam to determine the distance to the top level. The sensor can be very reliably used to maintain sufficient material in the hopper by controlling the inlet valve. This sensor is available in M36 brass chrome plated housing and works on 12VDC or 24VDC supply. Sensing range is between 100mm and 600mm.

The switch is designed very user-friendly by providing a ‘TEACH-IN’ button and  red LED for selection of Lower level and Upper level. The levels are stored in non-volatile memory, so whenever power fails or switched off, the level settings remain intact. A green LED is provided for output ON/OFF indication. NPN or PNP transistor output is available to drive inlet valve and is protected for short circuit, overload and Inductive load.

The specialty of this switch is, it’s functioning is independent of object colour. If you set levels on white object and use for red, black, blue or any colour object you get the same level control. Except for water-clear material it works fine for all other colour material. This switch is very useful for Pharmaceutical, Foods, Packaging and Plastic industries.


Shiva Electronics, Nashik, India

Tel./Fax: 91-253-2511565

E-mail: info@shiva-electronics.com



New 16-Bit Rotary Torque Sensor System for Automotive Powertrain Dynamometers


Depew, NY - TORKDISC® Rotary Torque Sensor System from the Force/Torque Division of PCB Piezotronics, Inc. is a compact in-line rotary torque sensor, ideally designed for automotive powertrain dynamometers and other torque measurement applications that require a robust torque transducer where axial space is at a premium. The TORKDISC® features a field proven telemetry system that consists of an on-board electronic module that converts torque signals into a high-speed digital representation. Once in digital form, this data is transmitted to a non-contacting pick-up loop, with no risk of noise or data corruption. A remote receiver unit converts the digital data to a high-level analog output voltage, frequency output, and a serial digital output. This series was recently updated with additional features including a 2-pole low pass butterworth analog output filter and 16-bit resolution.


Typical applications include dynamometer testing of gasoline and diesel engines, transmissions, transfer cases, and differentials. Additional applications include torque studies on pumps, fans and electric motors. Series 5300 torque sensors offer capacities from 2,000 to 225,000 in-lb (226 to 25.4 k N-m) full-scale and maximum speeds to 15,000 RPM.



Peter Munschauer,

Division Manager, Force/Torque Division,

3425 Walden Avenue, Depew, NY 14043-2495 USA

Tel: (888) 684-0004 ext. 2405 

Fax: (716) 684-8877

E-mail: pmunschauer@pcb.com

Rotary Torque Sensor System



Micronas Expands 32-Bit MCU Line for Automotive Electronics Applications


Freiburg, Germany -Micronas has expanded its CDC 32xxG family of controllers with the CDC 3217G and CDC 3257G MCUs. Both chips feature the Device Lock Module, which prevents unauthorized Flash access. Like all members of the family, the new chips integrate the 32-bit ARM7TDMI® RISC processor core to meet the demand for more powerful dashboard and car body electronics that provide an enriched cockpit experience to drivers and passengers alike.


The CDC 3217G expands the high end of the family, with 1 MB of Flash and 32 KB of RAM on chip, plus four CAN Bus controllers. The CDC 3257G extends 32-bit power to lower-cost applications, with 256 KB of Flash, 12 KB of RAM, and two CAN Bus controllers. Both chips include a wide range of other peripherals, including multifunction ports, a special function ROM and a sound generator. Additionally, there are two UARTs, two SPI, two IІC and up to 102 pins of general purpose I/O.


Anja Maria Hastenrath,

Zugspitzstr. 10

81541 Munchen, Germany

Tel.: +49 89 69760610, fax: +49 89 69760613

E-mail: ah@embedded-pr.de

CDC 32xxG family microcontroller



IMI Sensors Receives Patent for Machinery Fault Detector


Depew, NY, USA – The IMI Division of PCB Piezotronics has been granted a U.S. patent (No. 6,889,553) for the Model 682A05 dual 4-20 mA output, DIN rail mount machinery fault detector, an advanced vibration signal conditioner and transmitter designed to provide early warning of imminent machinery failure using PLC, DCS, SCADA, alarm and control systems.


The Model 682A05 Machinery Fault Detector accepts a 100 mV/g ICP® accelerometer input signal and, via sophisticated signal conditioning techniques, offers two 4-20 mA outputs for continuous machinery health monitoring, and an analog voltage output for detailed vibration signal analysis. Through a 1 kHz/5 kHz selectable high-pass filter, the first output measures “peak” g levels over a specified time interval, critical in the detection of early bearing faults. The second output measures “overall” vibration levels in user-selectable units, from 10 Hz to 1 kHz. This second output is ideal for detecting low frequency faults such as out-of-balance and misalignment.


Able to interface with existing plant architecture, this unit will provide 24/7 monitoring of rotating equipment and is well suited for detecting lubrication starvation, inner and outer race faults, impacting, and contamination.


Molly Bakewell,

Marketing Communications Supervisor

PCB Piezotronics, Inc.         

3425 Walden Avenue  

Depew, NY  14043-2495

Tel.: (800) 828-8840 ext. 2663, fax: (716) 684-0987

E-mail: mktg@pcb.com

682A05 Machinery Fault Detector



UltraPort USB to Serial Port Adapters


The adapter is manufactured by Perle Systems and now available from Celsum Technologies Ltd., make it extremely easy to connect multiple RS-232 serial devices to the USB ports of a computer systems or USB hubs.


Available with 1, 2, 4 or 8 DB9 9-pin 'D' connector serial inputs connecting via a single USB port, the UltraPort range operates with USB 1.1 and USB 2.0 host ports, has Plug & Play and hot plug features, and allows serial port speeds of up to 230 kbps. The serial ports appear a standard Windows COM ports, and may be renumbered at COM1 to COM4 to operate with applications such as HyperTerminal. Full RS232 modem control signals are available, with full hardware and software flow control, there are no additional IRQ or memory address requirements, and the units are ESD surge protected to 15kV.


The UltraPort units will work with Windows 98, 2000, XP, ME and with Linux operating systems, comes with Perle's Limited Lifetime Warranty and support, including free downloadable software updates.


Ms. Nicola Farmer ,

Sales and Marketing Department

Celsum Technologies Ltd.

Willow House, 17 Braemar Close,

Mountsorrel, Leicestershire LE12 7ES UK

Tel: +44-(0)116-210-6319, fax:: +44-(0)870-120-9370

E-mail: sales@celsum.com

UltraPort USB to Serial Port Adapters





Wilcoxon Partners  with Two New European Representatives


Gaithersburg, MD - August 4, 2005 – Wilcoxon Research is expanding the presence in Europe with the addition of two new Manufacturer's Representatives in Poland and Italy.


PWDT Technicad, the most recent addition to our International reseller network, provides equipment, software and services for rotating machine monitoring and vibrodiagnostics. Technicad will work with us to enhance Wilcoxon’s presence in Poland, where a growing manufacturer base promises many opportunities.


ELAP SPA, our Representative in Italy, specializes in the development, production and commercialization of Process Control equipment. ELAP’s range of services includes a wide variety of PLC integrated sensors and transducers. ELAP will focus on Wilcoxon’s products for the industrial and processing markets, enabling solutions to critical asset maintenance.


Courtney Schlapo,

Marketing Communications Specialist,

Wilcoxon Research, Inc.

Tel: 301-216-3039

E-mail: CSchlapo@Wilcoxon.com



ENDEVCO Joins Forces with FGP Sensors & Instrumentation for Product Distribution in France


San Juan Capistrano, Calif. - August 9, 2005 - Endevco Corporation, announced that FGP Sensor and Instrumentation has been signed as a non-exclusive distributor of its test and measurement products in France.


This partnership validates ENDEVCO's continued commitment to supporting its customers in Europe, where it has a strong reputation in the aerospace, automotive and general testing communities for high performance, reliable accelerometers, and crash test, vibration, pressure sensors and signal conditioners. FGP is also a well recognized supplier of sensors for the automotive and aerospace market segments.


Wendi Burke,

Communications Manager

Meggitt Electronics/

ENDEVCO Corporation

Tel. 949.493.8181

E-mail: wendi.burke@meggittsensors.com





Multisensor Data and Information Processing

(Special Issue, August 2005)


S&T Special Issue's cover





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