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Vol. 64, No. 2, February 2006
Table of Contents |
RESEARCH
A Sensitive Dissolved Oxygen Sensor Based on a Charge-Transfer Complex Modified Electrode
A charge-transfer complex was modified on the graphite paste electrode for making a sensitive dissolved oxygen sensor. It was composed of copper with two ligands of phenanthroline and 1,2-dicyano-1,2-dithiol- ethane. Because of the low redox potential of the core ion and the pull and repulsive effect from the ligands, the redox of modified complex toke place under lower potential and it could selectively catalyze the reduction of dissolved oxygen. The slope of the chronocoulometric curve of the sensor proportionally responded on the content of dissolved oxygen from 0 to 16 mg/L within 1–2 seconds. It was applied to detect the dissolved oxygen in tape water and the campus river for 3.0mg/L and 5.1mg/L. This sensor responded the dissolved oxygen with high selectivity, wide linear range, high accuracy, excellent stability and fast speed. It’s very possible to act as a practical sensor for the detection of dissolved oxygen in field.
TU Yifeng
Institute of Analytical Chemistry,
College of Chemistry and Chemical Engineering,
Suzhou University, P.R.China
New Metallic Oxide Electrodes for the Deposition of Functionalised Polymers
This article explores the possibilities of using Sb doped SnO2 thin films as potential electrode substrates for biosensors. Two series of electrodes were modified with electrogenerated functionalised polymeric films. The polymers investigated were biotinylated poly(ruthenium pyrrole) and poly(pyrrole benzophenone). AFM studies show polymer morphologies depending on the nature and roughness of the substrates.
Grégoire Herzoga, Naoufel Haddoura, Valérie Stamboulib, et. al
a Laboratoire d’Electrochimie Organique et de Photochimie Redox,
Institut de Chimie moléculaire de Grenoble,
Université Joseph Fourier Grenoble, France
b Laboratoire des Matériaux et du Génie Physique, ENSPG, BP 46,
38402 Saint Martin d'Hčres, France
The Global Electronic Pressure Transmitter, Transducer, and Component-Level Sensor Industry
This white paper highlights findings of a study completed by Venture Development Corporation (VDC) in January 2006. The detailed study findings are contained in three volumes, one each for: ·Electronic Process Pressure Transmitters, Electronic Non-Process Pressure Transmitters & Transducers; and Electronic Component-Level Pressure Sensors.
James K. Taylor,
Venture Development Corporation
PRODUCT NEWS
New 3049E Series of Robust, Miniature Accelerometers
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Chatsworth, CA: Dytran Instruments introduced the new 3049E series of robust, miniature accelerometers. The new accelerometers feature low mass, a top connector for a removable cable and electrical ground isolation. They are available in two mechanical configurations; an adhesive mount and a 10-32 stud mount version.
The 3049E series now features a low impedance voltage output (IEPE) that is compatible with most data acquisition and modal analysis equipment. These new accelerometers are available in ranges of 50 g and 500 g with sensitivities of 100mV/g and 10 mV/g respectively. Charge mode versions (3049D, 3049D1) are available in the same package configurations with a sensitivity of 5.8pC/g. Constructed of lightweight titanium, the sensors are hermetically sealed and feature welded construction ...
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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 |
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January 25, 2006, Cincinnati, OH – THE MODAL SHOP, INC., a PCB Group Co., introduces the addition of sensor linearity check capabilities to the workhorse Model 9155C Accelerometer Calibration Workstation.
The Model 9155C-501 Linearity option allows users to perform multipoint sensor linearity checks up to 40gpk using The Modal Shop’s calibration-grade air-bearing shaker. Linearity checks can be performed up to an amplitude of 500gpk with a mechanical amplifier bar. Verifying linearity provides additional assurance of sensor health and performance, increasing confidence in measurement accuracy ...
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Mr. Scott Sorensen, Marketing Manager THE MODAL SHOP, INC. 3149 E. Kemper Road, Cincinnati, OH 45241 Tel.: (513) 351-9919, fax: (513) 458-2172 E-mail: ssorensen@modalshop.com |
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High Sensitivity Force Sensors for Dynamic Biomedical Tissue Product Testing
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Depew, NY, USA - High Sensitivity, Miniature Series 209C Quartz Piezoelectric Force Sensors from the Force/Torque Division of PCB Piezotronics, Inc. (PCB®) measure dynamic compression and tensile forces in a wide variety of biomedical tissue product testing applications. Sensors feature ICP® voltage output, and have an extremely high sensitivity of 2,200 mV/lb (500 mV/N) at a force range of 2.2 lb (10 N) in compression and 1 lb (4.5 N) in tension. ICP® force sensors contain built-in microelectronics to convert the high impedance charge to a low impedance voltage, which eliminates the noise associated with charge amplifiers and the required high impedance cables. This allows for a broadband resolution from the sensor of 20 µlb rms (90 µN rms).
Biomedical applications include dynamic testing of muscle fiber, cartilage, bone and hair specimens. Product testing applications include spring force and hysteresis, electrical contact and relay actuation forces, computer keyboard finger force and touch screen push force ...
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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 |
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City Technology Wins Contract to Supply Sensors to Chinese Coal Mines
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City technology ltd., has recently signed a contract with the China Coal Mine Research Institute (CCRI) Fushun Branch to supply gas sensors for use in coal mines in China. Currently 80% of all mining accidents occurring in China are caused by gas explosions. In an effort to improve safety and reduce accidents the Chinese government has started investment to improve and extend gas testing in coal mines.
City Technology has been supplying a wide range of gas sensors to Chinese customers for more than 10 years. To meet the ever-growing needs of current and future customers City Technology opened a Representative Office in Shanghai in May 2004 ...
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Miss Nicola Nye, City Technology Ltd. Walton Road Portsmouth, Hampshire, PO6 1SZ, UK Tel.: 023 9232 5511 E-mail: nicola.nye@citytech.co.uk |
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Flexible C-Series Sensor Provides Curvilinear Measurement
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CARY, N.C - MTS Systems Corp. Sensors Division has enhanced its C-Series sensor to provide precise curvilinear measurements in relevant applications. Featuring a new face and side sealing on the core plastic housing, the Flexible C-Series provides a greater versatility in installation options such as rotating shafts, balances, steering assemblies and other applications where less than 270 degrees of rotation needs to be monitored ...
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Jesse Russell, MTS TemposonicsCommerical Product Marketing Manager Tel.: 919-677-0100 E-mail: jesse.russell@mts.com |
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Model 377A60 Random Incidence Microphone with Sensitivity of 50 mV/Pa
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January 23, 2006, Depew, NY, USA - The Vibration Division of PCB Piezotronics, Inc. (PCB®) introduced Model 377A60 externally polarized, 1/2" Random Incidence (Diffuse Field) type microphone. The distinguishing feature of this model is its enhanced sensitivity of 50 mV/Pa. It has wide dynamic range (15 to 146 dB (A) re 20mPa) and a frequency range from 3.15 Hz to 10,000 Hz (+/- 2 dB). This traditional type condenser microphone has a +150 °C (+302 °F) operating temperature range, and -when combined with the PCB Model 426A30 preamplifier -can operate from a 200 V power supply for externally polarized microphones. This traditional-style microphone preamplifier terminates in a 7-pin LEMO style connector.
In addition to its traditional 200V models, PCB carries a full line of modern, pre-polarized, condenser microphones and preamplifiers. Powered by a 2 to 20 mA signal conditioner and standard coaxial cables, these modern designs allow for significant savings in power supply and cabling cost, greater ease-of-use and operate from the same power required for ICP® accelerometers. This provides the advantage of using microphones with ICP® accelerometers in the same test, with the same signal conditioning equipment, minimizing set-up time ...
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Mark Valentino, Product Manager Vibration Division 3425 Walden Avenue, Depew, NY 14043-2495 Tel.: (888) 684-0013 ext. 2437, fax: (716) 685-3886 E-mail: mvalentino@pcb.com |
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Digital Delay/Pulse Generator with Selectable Time References
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San Rafael, CA; February 2, 2006 - Berkeley Nucleonics Corporation (BNC) has released a new multi-channel Digital Delay/Pulse Generator, Model 565, which allows time reference selection for each channel. Conventional digital delay generators use a time reference that is automatically pegged to its trigger. Up to eight channels of delay and width control are available with BNC s Model 565. Each individual channel s reference can be set either to the trigger or to any other channel.
The Model 565 offers 500 picosecond (ps) timing resolution with widths and delays out to 1000 seconds. Setups can be stored within the instrument allowing reuse of frequently applied testing configurations. The 565 provides USB, RS-232 and GPIB programming standard with optional Ethernet communication ...
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Marcia Norris, Berkeley Nucleonics Corporation 2955 Kerner Blvd., San Rafael, CA 94901 Tel.: 415-453-9955 x203 E-mail: marcia@berkeleynucleonics.com |
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New Model 426B02, In-Line A-Weight Filter
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February 1, 2006, Depew, NY, USA - The Vibration Division of PCB Piezotronics, Inc. (PCB®) introduces Model 426B02, 1/2" in-line A-Weight filter, which operates from ICP® sensor power and is designed to work with prepolarized microphones. The human ear naturally attenuates certain frequencies. This filter is designed to simulate how a sound pressure level, at different frequencies, would appear to a normal human ear. It is commonly used in automotive, aerospace, and appliance testing applications, among others, where manufacturers are concerned about how the human ear perceives sound pressure levels at the different frequencies generated by their products. The goal is for safety or to make the sound as pleasing to the ear as possible. The Model 426B02 can be attached directly to the Ѕ" preamplifiers BNC connector, or between the preamplifier and a 4 to 20 mA constant current supply, via low cost coaxial cables.
This ICP® design allows for significant savings in power supply and cabling cost, greater ease-of-use and operates from the same power required for ICP® accelerometers. This provides the advantage of using microphones with ICP® accelerometers in the same test, with the same signal conditioning equipment, minimizing set-up time ...
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Mark Valentino, Product Manager Vibration Division 3425 Walden Avenue, Depew, NY 14043-2495 Tel.: (888) 684-0013 ext. 2437, fax: (716) 685-3886 E-mail: mvalentino@pcb.com |
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Carbon Nanotube Transistor Channels Can Detect Single Base Mutations in DNA
PITTSBURGH—University of Pittsburgh researcher Alexander Star and colleagues at a California-based company, Nanomix, Inc., have developed devices made of carbon nanotubes that can find mutations in genes causing hereditary diseases, they report in the Jan. 16 issue of the journal Proceedings of the National Academy of Science. This method is less expensive and takes less time than conventional techniques.
Carbon nanotubes are rolled-up sheets of graphite only a few nanometers wide—about the width of a molecule of DNA. The researchers used these nanotubes’ electrical properties to find a particular mutation in the gene that causes hereditary hemochromatosis, a disease in which too much iron accumulates in body tissues ...
Karen Hoffmann,
Tel.: 412-624-4356
E-mail: klh52@pitt.edu
TECHNOLOGY NEWS
Parylene is a polymer film which is applied in thin layers (50nm - 50µm) to the specimen in a gaseous form under vacuum. The result is a protective coating with unsurpassable characteristics compared to other methods, such as protective lacquers and with outstanding properties. It is a well proven technique since over 40 years and has been used primarily in military and space technology applications.
Typical applications are:
Electronic devices in tough environments
Piezo actuators
MEMS
Microwave electronics
Electrical isolation (200volts/µm)
Sensors in tough environments
Transparency, could be of optical quality
Space and military electronics for maximum durability endurance
Corrosion protection of metallic surfaces, heat exchangers, etc.
Reinforcement of micro structures, bond wires
Abrasion resistance
Environmental protection for key pads, rubber, plastics, etc.
Reduction of friction for rubber and plastics
RoHS compliant
Medical technology (Approved and has a USPXXII, Class VI Bio compatibility rating
Kjell Askerfalk
Para Tech Coating Scandinavia AB
Elektronikhцjden 6,
Box 567 S-175 26 Jarfalla, Sweden
Tel.: office +46 (0)8-58082579, mobile +46 (0)73-9626270
Fax: +46 (0)8-58026106
Multisensor Data and Information Processing
(Special Issue, August 2005)
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