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Vol. 75, No. 1, January 2007




Table of Contents





Extra Sensor Perception


Abstract: This article describes the importance of sensor verification. It also describes the benefits of a portable sensor verification system and how it can be an essential tool that compliments any program in which sensors are used for control manufacturing or during critical testing ...



FUTEK Advanced Sensor Technology, Inc.

10 Thomas Irvine, CA 92618, USA



A Response Surface Methodology Model for Optimizing Electromagnetic Acoustic Transducers’ Parameters


Abstract: Flaw detection is one of the most important problems that pipeline industries are concerned. Conventional ultrasonic method needs coupling medium, and is not more suitable for in-line inspection systems. Electromagnetic acoustic transducers can be used as a good alternative technique in the applications of in-line inspection. However, it is relatively new technique and effectively needs more research. The response resolution is directly related on amplitude of ultrasonic waves. This paper presents signal amplitude model in inspection of steel plate in terms of magnetic current, static magnetic field and thickness of plate using response surface methodology. The established equation shows that the magnetic current was found to be main influencing factor on the signal amplitude. The variance analysis for the polynomial model reveals that the interaction terms and the square terms for static magnetic field except the interaction with magnetic current were statistically insignificant. However, it could be seen that the second-order effect of static magnetic field is significant. After magnetic current, thickness of plate is the most influencing factor on signal amplitude while the impact of static magnetic field is negligible ...


Ali. Doniavi, Mehdi. Eskandarzade

University of Urmia, Urmia, Iran



Design of High-Speed Pulse Input Based Capacitance Measurement for Electrical Capacitance Tomography


Abstract: The High Speed pulse input based capacitance measurement has been designed for electrical capacitance tomography. It has a high resolution with low offset and extremely low gain drift, compared with a charge/discharge and AC based Transducer designed for same purpose. This paper focuses on the development of new sensing methods to measure the capacitance range from femto farad up to 100nfarad. All functions are programmed in an embedded controller (PIC16F874A/877A), which can be easily translated in to the capacitance with noise level to 0.2 % and sensitivity of the measurement up to 0.18-femto farads/micro volt ranges ...


S. Sathiyamoorthy, J. Saratchandrababu

National Institute of Technology,

Tiruchirappalli, India



Hardware Development of Ultrasonic Tomography for Composition Determination of Water and Oil Flow


Abstract: A monitoring system for water and oil flow using ultrasonic Tomography is implemented. Information such as the type of flow, the composition of the water and oil can be obtained from the system. The composition of the flow is determined based on the propagation time of the ultrasonic waves. The ultrasonic Tomography system includes the sensors fixture design, signal conditioning circuits and image reconstruction software. The image reconstruction algorithm that used is the Linear Back Projection (LBP) algorithm ...


Ruzairi Abdul Rahim, Ng Wei Nyap, Mohd. Hafiz Fazalul Rahiman

Universiti Teknologi Malaysia



Tissue Analysis by Virtual Instrumentation


Abstract: This paper introduces the possibilities of diagnostics and analysis of tissue via virtual instrumentation - LabVIEW. The two dimensional images shot by the camera provide information about the surface properties and degradation of a real skin. The main idea is based on the human skin parameters measured for healthy and ill skin. The aforementioned access provides parameters evaluation by creating a structure model. The anomalies are recognized by this model ...


Libor HARGAŠ, Dušan KONIAR, Miroslav HRIANKA

University of Žilina, Slovak Republic



3D Reconstruction of NMR Images by LabVIEW


Abstract: This paper introduces the experiment of 3D reconstruction NMR images via virtual instrumentation - LabVIEW. The main idea is based on marching cubes algorithm and image processing implemented by module of Vision assistant. The two dimensional images shot by the magnetic resonance device provide information about the surface properties of human body. There is implemented algorithm which can be used for 3D reconstruction of magnetic resonance images in biomedical application ...


Peter IZAK, Milan SMETANA, Miroslav HRIANKA

University of Žilina, Slovak Republic



Characterization of High Voltage Single Disk-Type Piezoelectric Transducers as a Function of Load Resistance


Abstract: Two designs of disk-type piezoelectric transducers have been characterized as a function of load resistance, at around their center frequencies. The first transducer was fabricated using BM400 material while the second transducer was fabricated using APCI-880 material. These transducers were mounted inside Teflon insulation using special screws indicated by a and b. The input voltage was then applied between ring and bottom electrode using special screws noted as 1 and 3. The output voltages from dot and bottom electrodes of these transducers were terminated with load resistance, and measured from screw 2 and 3. The voltage transformations observed from the second transducer was higher as compared to that obtained in the first transducer, because, the mechanical quality factor of APC-880 is higher than that of BM400 material. The final results of this investigation gave the optimal load resistance of each transducer when operated below and above resonant frequency ...


Selemani SEIF

Alabama A & M University, USA





New Optoacoustic Device for Water Properties Monitoring: Comprehensive Analyzer of Matter Properties (CAMP)


Alex Kaivarainen

University of Turku, Finland






Series PT500 Beam Load Cells with Built-in Analog and Digital Electronics


Manufacturers of industrial machines and weighing systems often need to measure forces and weight with low profile load cells that are easy to mechanically fix. DS Europe to satisfy these needs is proposing series PT500 strain gauge load cells with optional built-in electronics that allow an high resolution and a simple cabling with cost reductions during the machine assembling.

  • Measuring ranges: 0 to 100-300- 500Kg

  • Accuracy: ± 0,05% FS

  • Analog outputs: 2mV/V tip., 5V, 10V e 4-20mA (2 fili).

  • Digital outputs: RS485, RS422 (protocols Modbus, DSEnet), CAN profilo DS406

Optional analog and digital electronics being inside the load cell is electrically shielded, it avoids expensive external electronic junction boxes and is precalibrated at DS Europe test bench. Digital electronics is optimal for machines with many weighing stations because it allows to connect, with a simple cabling, many load cells to a single digital com port of PLC therefore avoiding expensive analog input cards. Digital electronics allows to measure small weight variations because of its 24bit max. A/D converter that allows also to measure fast weight variations with up to 1920Hz sampling rate. CAN data transmission allow also to transmit alarm levels and error messages.


Typical applications: automation. Weighing systems, textile machines, dosing with hoppers and tanks, machine tools, marble machines, tiles machines, packaging machines, vehicles, agriculture machines etc. ...


DS Europe S.r.L.

Via F. Russoli 6

20143, Italy, Milano

Tel.: 0039 02 8910142

Fax: 0039 02 89124848

E-mail: dseurope@dseurope.com

PT500 strain gauge load cells



Pressure Sensors Certified for Hazardous Industrial Environments


January 12, 2007, Depew, NY, USA - PCB Piezotronics, Inc. (PCB) has introduced a series of dynamic, ICP pressure sensors that have been certified under ATEX and CSA for use in hazardous environments. These sensors are widely used on pumps, compressors, power generation equipment, and other machinery operating in hazardous environments.


Series 102 and 121 pressure sensors are ideal for monitoring performance of compressors, pumps, and gas turbines, because they measure dynamic pressure events such as surges, pulsations, and spikes. These sensors also detect wellhead acoustics to determine properties of mud & water. Sensors may be used with ICP signal conditioning and permit the use of a variety of inexpensive two-wire cable systems. The low-impedance signal may be transmitted over long cable distances, and the sensors may be used in dirty environments with no signal degradation. Various mounting configurations are available, with pressure ranges from 50 to 5,000 psi (345 to 345,000 kPa), and sensitivities from 1 to 100 mV/psi (0.15 to 14.5 mV/kPa) ...


Bob Metz,

Pressure Product Manager

PCB Piezotronics, Inc.

3425 Walden Avenue

Depew, NY  14043-2495 USA

Tel.: 716-684-0002 ext. 2683

Fax: 716-686-9129

E-mail: pressure@pcb.com

Series 102 and 121 pressure sensors



Rod End Tension / Compression Load Cell – LCB500


FUTEK’s popular LCB500 is designed for possible use as a rod end load cell with mounting plates. This tension / compression load cell is typically used in inline actuators and hydraulic jacks with male/female threads. Although small and compact in size, it is well suited for low and high capacity ranges from 100 – 5k lbs. The flexure is made from Stainless Steel making it highly durable and ideal for endurance testing. Other benefits include welded & sealed covers and easy mounting provisions. The LCB500 can also be provided with a TEDS option ...


John Vargas

Sales Engineer

FUTEK Advanced Sensor Technology, Inc.

10 Thomas, Irvine, CA 92618

Toll Free: 1-800-23-Futek

Tel: 949-465-0900, fax: 949-465-0905

E-mail: john@futek.com

LCB500 load cells



Compact, Miniature Sensor for Pressure Measurement in Confined Areas


Mt. Olive, NJ–January 3, 2007 - American Sensor Technologies, Inc. (AST) offers a miniature stainless steel pressure sensor for pressure measurement in confined areas. With an overall length of less than two inches and a diameter of 0.7 inches, the Model AST4800 Pressure Sensor can be employed in a wide range of applications including hydraulic systems, tests stands, HVAC/R, panel builders, automotive, as well as in industrial and agricultural equipment.


Through the utilization of the AST’s patented Krystal Bond Technology, the Model AST 4800 incorporate a one-piece stainless steel sensing element that is free of silicone oil, welds or O-rings. This configuration eliminates the chance of contamination from outside media. In addition to a compact design, the Model AST 4800 features a high-strength stainless steel construction that is highly compatible with a diverse range of liquids and gases.  Other benefits of the Model AST 4800 include its excellent response time (<1msec) and excellent price to performance ratio.


The Model AST4800 operates at a broad temperature range from -20 to 105*C [4 to 220*F]. Units operate over ranges between 0-500 PSI and 0-10,000 PSI. Sensors are equipped with a 10mV/V output, providing more output signal than the competition. In addition, cable length options of 2, 4, 6 and 10 feet are offered ...


Karmjit Siddhu

American Sensor Technologies, Inc.

450 Clark Drive, Mt. Olive, NJ 07828, USA

Tel.: 973-448-1901,

Fax: (973) 448-1905

E-mail: ksiddhu@astsensors.com

AST4800 Pressure Sensor



 Hermetically-Sealed LVDT Sensors Feature 4-20 mA I/O in Both 2-Wire or 3-Wire Configurations for Simplified Field Integration


Pennsauken, NJ, January 2, 2007- Macro Sensors, offers a new family of rugged, hermetically sealed LVDTs that provide 4-20 mA input/output for easy field integration with PLCs, digital indicators, host computer-based data processing, and QC data collection systems. Units can be configured for either loop powered two-wire or externally powered three-wire sourcing output to address different I/O requirements in various applications.


Offered in both hard-connected and spring-loaded versions, Macro Sensors’ 4-20 mA current loop output LVDTs are hermetically sealed against dirt, water, steam, solvents, and other corrosive elements, that enables their installation in hostile environments while the loop wiring connects to remote indicators and/or controllers located in environments safe from hostile conditions. These units offer precise output with a maximum linearity error of only 0.1% of full range output using a statistically best-fit straight line ...


Jean Carl

PR Consultant

Macro Sensors

U.S. Route 130 North, Bldg. 22,

Pennsauken, NJ  08110-1541

Tel: 610-565-2288, fax: 856-317-1005

E-mail: fjcarl@comcast.net

LVDT Sensors



MTS Sensors Measure Stroke in Machine Fixture Set-Up Clamps


CARY, N.C (January 5, 2007) - MTS Systems Corp., Sensors Division Temposonics® C-Series sensors are currently being embedded into actuators of automatic fixture set-up clamps to provide confirmation that the clamp is in position prior to machining, welding or other fabrication operations. Providing accurate measurement of stroke, an embedded C-Series continuous position sensor located inside the electric, hydraulic or pneumatic actuator of the clamp ensures that a variety of parts can be clamped down in the proper position without sensor readjustment.


The C-Series sensor suits an array of automatic clamps, including ones with high clamping forces, as well as retracting and latch bench clamps. The C-Series Core sensor is available with a 0V to 5Vdc or PWM output, and can be powered with a standard 5Vdc power supply. In addition, the modular architecture allows the addition of a second electronics board that configures the sensor to operate using 12V power and also adds additional protection circuitry for higher EMI immunity ...


Jesse Russell,

Commercial Products Marketing Manager

MTS Sensors Corporation,

3001 Sheldon Drive

Cary. NC 27513

Tel.: 919-677-0100, fax: 919-667-0200

E-mail: jesse.russell@mts.com

C-Series sensor



inGen Linear Direct Sensor Technology


INPROX Sensors, a Boston, Massachusetts based sensor technology company, is proud to announce its square wave output, digital sensor technology platform, inGen Linear Direct™, ready for custom development and license in critical OEM applications for automotive, aerospace, medical device and appliance markets.


inGen, is a revolutionary, low cost patented technology suite of continuous output, harsh duty, non contact, precision sensors. These digital sensors run on an innovative, proprietary IC capable of interfacing directly with microprocessors without the need of any signal conditioning; internally or externally. Offering new capabilities in the areas of position, speed, temperature and pressure, inGen sensors utilize a specially tuned oscillator, which in turn produces a ‘frequency of oscillation’; an output in the form of a square wave that is read as a pulse train by digital microprocessors ...


Derek Weber

VP Sales

INPROX Sensors

28 State Street Ste.1100

Boston, MA 02109

Tel.: +617-573-5158, fax: +617-507-2665

E-mail: dweber@inproxsensors.com




Shock Sensor Calibration Now Available for the Accelerometer Calibration Workstation


THE MODAL SHOP, INC., a PCB Group Co., introduces shock sensor calibration capabilities to the workhorse Model 9155C Accelerometer Calibration Workstation. The Model 9155C-525 Shock Calibration option provides verification and linearity check up to 10,000g allowing accurate calibration of shock accelerometers at amplitude levels used in actual automotive or aerospace shock testing. The system uses PneuShockTM, a state-of-the-art pneumatically actuated exciter, to provide controlled and consistent impacts. It also includes a variety of impact anvils and projectiles to tailor the impulse shape for frequency content and shock level to cover the entire 20g to 10,000g amplitude range.


The shock accelerometer calibration capability seamlessly integrates into The Modal Shop’s Model 9155C Accelerometer Calibration Workstation that performs calibrations on both ICP® and charge mode accelerometers, providing both sensitivity and phase data. Calibrations are performed using the 'back-to-back' method according to ISO 16063-21. All sensor information and calibration data is managed within a Microsoft Access database that allows for customizable calibration reports conforming to the requirements of ISO 17025 for calibration certificates. The system also self-documents measurement uncertainty according to ISO 16063-21 ...


Mr. Scott Sorensen

Marketing Manager


3149 E. Kemper Road

Cincinnati, OH  45241

Tel.: (513) 351-9919

E-mail: ssorensen@modalshop.com

Model 9155C Accelerometer Calibration Workstation



AKCP Improves Live Sensor Mapping and Alarm Notifications


Bangkok, Thailand. January 17, 2007 - AKCP's sensorProbe8Linux has received a major update and now boasts a drastically improved and simplified Notification Wizard, a completely intuitive Graphical Sensor Configuration System and easier to use Mapping Features.


The all new Notification Wizard puts our most simple, yet powerful system at your finger tips and completely changes the way you configure the SP8L to monitor your assets. The Notification Wizard allows multiple sensors to trigger multiple actions under multiple conditions. It might sound complicated, but configuration has been made intuitive and natural. Notification is configured by choosing a sensor, choosing your conditions and choosing what to do under these conditions. If you want to monitor when the Temperature in your server room rises above 60 degrees and have an e-mail to the support team sent, it's now as easy as saying it. Configuring notifications is made simple by selecting each variable in small steps ...


AKCP Co., Ltd.

Office 9A WANG DEK Building,

19/1-2 Vibhavadi Rangsit Road

Jatujak, Bangkok 10900, Thailand

Tel.: +66-2-617-8998, fax: +1-208-460-8972

E-mail: marketing@akcp.com

Sensor Mapping






Multisensor Data and Information Processing

(Special Issue, August 2005)


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