bullet Sensors & Transducers e-Digest (S&T)

 


 

No. 7, July 2002

 

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Table of Contents

 

EDITORIAL

 

Best of Toronto ISA' 2002 Awards

 

Abstract

Canada's largest annual exhibition of measurement, instrumentation, industrial automation and control technologies ISA 2002 has taken place in Toronto, Ontario, 28-29 May 2002. The report is illustrated by some photos from the exhibition. Five top products - Best of Toronto ISA' 2002 Awards winners are described in the article. The conclusion how to prepare ISA' 2003 by the best way and take part in this event more efficiently is given in the paper. Click <here> to read the full pages article.

 

Editor's signature

 

 

Dr.Sergey Y.Yurish,

Sensors & Transducers e-Digest Editor

 

 

PRODUCTS

 

High Sensitivity Pressure Sensors Detect High Intensity Acoustic Sound Pressure Levels

 

Series 106 and 116 dynamic pressure sensors, from the Pressure Division of PCB Piezotronics, Inc., offer the ability to measure both low-level pressure and high-intensity sound pressure levels, both acoustic and ultrasonic. The sensors are useful for measurements in a variety of applications including: monitoring pulsations, turbulence, and noise in hydraulic and pneumatic systems; detecting pressure fluctuations in exhaust systems, compressors, turbines, pumps and pipe lines; and measuring noise of jet engines, rocket motors, and weapons discharge. Pressure monitoring leads to increased efficiencies, reduced maintenance, and trims waste in process systems. Two ICP versions feature on-board electronics to provide a conditioned output signal for ease of use. Other charge mode units, without electronics, withstand temperatures to 750F (400C). The units feature solid-state construction, no moving parts, stainless steel housings, high frequency range, and up to 500 mV/psi sensitivity.

 

Dan Cummiskey,

Division Manager

PCB Piezotronics, Inc.,

Pressure Division

Fax: (716) 686-9129

E-mail: dcummiskey@pcb.com

Series 106 and 116 Pressure Sensors

 

 

High Temperature Accelerometer Achieves 900 F (482 C)

 

Model 357B61 accelerometer, from the Vibration Division of PCB Piezotronics, Inc., offers the ability to conduct vibration measurements on high temperature objects or in high temperature environments. With an ability to operate to 900 F (482 C), the unit is well suited for vibration testing and studies on engines, exhaust systems, manifolds, turbines, turbochargers, and steam handling equipment. The unit is structured using a shear mode, piezoceramic sensing element within a hermetically sealed, Inconel  housing. This provides an environmentally rugged device with resistance to oxidation, corrosion, and ability to survive 5000 g shocks. Additional features include exceptional linearity through a 3000 g measurement range, low sensitivity deviation over the entire temperature range, and a virtually non-existent sensitivity to base strain. Included with the device is a 10 ft (3 m) hardline cable, which also survives high temperatures.

 

Craig S. Aszkler,

Division Manager

PCB Piezotronics, Inc.,

3425 Walden Avenue

Depew, NY 14043-2495

Vibration Division

E-mail: caszkler@pcb.com

357B61 Accelerometer

 

 

Tri-Axial High Temperature Accelerometer Ideal for Structural and Component Evaluation

in Environmental Test Chambers

 

Endevco's new Model 65HT-10 tri-axial ISOTRON accelerometer uses the latest technology in high-temperature components and processes. The unit's microelectronic circuits are designed specifically for continuous operation at an extended temperature up to +175C (347F). Packaged in a 10-mm cube of welded titanium, the unit weighs 5 grams. The Model 65HT-10 is shockproofed, overload protected and has excellent amplitude and phase frequency responses, making it ideal for structural and component testing in automotive test cells, environmental test chambers, and general laboratory applications. The reduced size of this accelerometer enables the test engineer or technician to measure the accelerations of three orthogonal axes of vibration simultaneously on lightweight structures. The Model 65HT-10 provides a high-resolution, low-impedance output. Dynamic range is 500 g's. High-temperature cable assemblies are supplied as a standard accessory. Interface to the accelerometer is via a hermetically sealed 4-pin connector. Endevco's Signal Conditioner Models 133, 2792B, 2793 or OASIS Computer-Controlled System are recommended for use with the Model 65HT-10 accelerometer.

 

James Mathews 

Product Manager 

ENDEVCO 

Tel: 949.493.8181

Fax: 949.661.7231

E-mail: james.mathews@endevco.com

65HT-10 Tri-Axial Accelerometer

 

 

High Temperature Miniature Piezoelectric Accelerometer Designed

for Measuring Vibration on Most Structures

 

Endevco's new Model 7251HT-10 and -100 is a miniature piezoelectric accelerometer with integral electronics that measures vibration on most structures at temperatures continuously up to 150C (302F). The low-profile unit is hermetically sealed against environmental contamination, and offers high output sensitivity and wide bandwidth. Dynamic range is 500 g's for the -10 model and 50 g's for the -100 model, while voltage output sensitivity is 10 mV/g for the -10 model and 100 mV/g for the -100 model. This new lightweight (14 gm) design effectively minimizes mass loading effects and is ideal for general-purpose and aerospace applications. The Model 7251 HT features Endevco's PIEZITE Type P-8 crystal element, operating in annular shear mode, which exhibits low base-strain sensitivity and excellent output stability over time. An internal hybrid signal conditioner incorporated in a two-wire system transmits its low-impedance voltage output through the same cable that supplies the constant-current power. Signal ground is connected to the accelerometer's outer case, and when the unit is used with the supplied isolated mounting screw, is electrically isolated from ground. The centrally located mounting bolt permits 360 cable orientation, a very desirable feature for many applications. Endevco's Signal Conditioner Models 133, 2792B, 4416B, 2793, 2775Aor OASIS Computer-Controlled System are recommended for use with the Model 7251 NT accelerometer.

 

James Mathews 

Product Manager 

ENDEVCO 

Tel: 949.493.8181

Fax: 949.661.7231

E-mail: james.mathews@endevco.com

7251HT-10 Piezoelectric Accelerometer

 

 

STAR1000 - a Radiation Hard CMOS Image Sensor

 

The STAR1000 has an effective resolution of 1.024 (H) x 1.024 (V) with a unit cell size of 15pm x 15um and a frequency of 12MHz. It includes an on-chip fixed pattern noise correction, a programmable amplifier and a 10-bit analogue to digital converter. This CMOS image sensor was especially designed for high radiation doses (for more than 230 krad). The STAR1000 is well suited for windowing, sub sampling and many more. Its dynamic range amounts 73dB, the power consumption is less than 400mW. The sensor is only available in b/w version.

 

April Castle,

Marketing Manager,

FRAMOS Electronics Ltd.,

Viewpoint, Basing View

Basingstoke,

RG21 4RG, UK

E-mail: A.Castle@framos.co.uk

STAR1000 CMOS Image Sensor

 

 

Vibration Meters

 

IMI Sensors, a PCB Piezotronics division, announces the Series 684 Enclosures for housing up to eight Model 683 Vibration Meters. These NEMA 4X fiberglass enclosures are provided with vibration meters factory installed to provide environmental protection and ease of installation by the user. Each vibration meter offers excitation power for 4 to 20 mA vibration sensors or ICP accelerometers and displays peak or rms vibration data on a fully scalable, highly visible, LED display. In addition, two set point relays offer alarm or control capabilities. Relay action is time-delayed to eliminate false alarm trips due to momentary upsets. Hinged doors provide ease of access to all necessary wiring. Power connections are ganged to common terminals and an optional BNC output per channel offers analog vibration signals for analysis and diagnostic purposes. The systems are intended for machinery condition monitoring to provide an early warning of impending failure of bearings or gears. Such vibration monitoring practices can help reduce the occurrence of unanticipated downtime, resulting in increased production, better maintenance practices, and increased profitability.

 

Eric G. Yax

Sales Manager

IMI Sensors Division

3425 Walden Avenue

Depew, NY 14043-2495

E-Mail: eyax@pcb.com

Model 683 Vibration Meters

 

 

 

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