Sensors/Data Acquisition

Photoelectric Sensors

The S18-2 compact photoelectric sensors from Banner Engineering (Minneapolis, MN) are now available in fixed-field background suppression mode configurations. The compact, self-contained sensors provide up to six detection ranges from 30 to 200 mm. Resistant to fluorescent light, the components also feature a small, bright red LED emitter beam.

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Voltage Sensors

Sendyne (New York, NY) has released the SFP102MOD, a shunt-based enclosed module capable of current measurements to 375 A, with 45 μA resolution. The module achieves ±0.25% accuracy for current magnitudes, as long as the module is within the operating temperature range of -40 °C to +125 °C. When attached to properly-sized cables/bus-bars, the SFP102MOD operates with 200 A continuous current, producing less than 45 °C temperature rise. Individually calibrated units are available.

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Motion Sensors

Bosch Sensortec (Kusterdingen, Germany) has announced the BMF055, a compact, programmable 9-axis motion sensor. The new sensor from Bosch Sensortec’s Application-Specific Sensor Node (ASSN) family combines a triaxial 16 bit gyroscope with a range of ± 2000 degrees per second; a triaxial geomagnetic sensor; and a 32 bit Cortex M0+ microcontroller from Atmel. The sensor measures 5.2 × 3.8 × 1.1 mm3. For Free Info Visit http://info.hotims.com/55595-155

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Sense Element Pump Ripple Fatigue

Aerospace sensor technology is plagued by the balance between sensitivity and durability. As devices become more fragile in the pursuit of achieving higher accuracy they find themselves torn apart in the process. Hydra-Electric solves this using a special sense element of stainless steel construction capable of withstanding the harshest pressure spike environments without the use of a snubber. Using finite element analysis, it was revealed that near infinite fatigue life is achieved even in high pressure applications. This demonstrates the superiority of a stainless steel flexure sense element over conventional piezoresistive silicon (PRT).

Posted in: White Papers, Data Acquisition, Sensors

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The Need for Speed

With today’s engineering challenges, the need for non-contact, high speed thermal measurement has never been greater. Traditional forms of temperature measurement such as thermocouples and spot pyrometers do not offer the resolution or speed required to fully characterize high speed thermal devices and provide adequate temperature measurement. Infrared cameras offer thousands, even millions, of points of non-contact high speed thermal measurement. However, not all infrared detectors are created equal. Here we’ll discuss the most common types of thermal infrared detectors and the capabilities as well as limitations of each. You’ll find this discussion helpful for solving applications involving fast moving targets or targets with fast thermal slew rates and the following information will provide the knowledge base to ensure measurements are reliable, avoiding a “garbage in, garbage out” situation.

Posted in: White Papers, Cameras, Data Acquisition, Detectors

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Position Sensor Technology for Hydraulic Cylinder Feedback

Variable inductance sensors offer a cost-effective option for mainstream, in-cylinder applications. Alliance Sensors Group, a Division of H.G. Schaevitz LLC, Moorestown, New Jersey Position feedback sensors for hydraulic or pneumatic cylinders have used one of three traditional technologies: magnetostrictive, variable resistance, and variable inductance. As the demand for increased control and functionality has increased, sensor-instrumented cylinders are becoming more important in the heavy industry, subsea, and mobile equipment worlds. Ultimately, a user or systems integrator must determine the requirements of the application and which technology best satisfies it on a total installed cost versus performance basis. The strengths and weaknesses of magnetostrictive, variable resistance, and variable inductance sensors are shown in the figure. These common sensing technologies utilize a long probe that extends into a deep, small-diameter blind hole that has been gun-drilled into the internal end of the cylinder rod.

Posted in: Briefs, Sensors

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Detection of Gases and Vapors Present at Low Concentrations

Ames Research Center, Moffett Field, California A nanostructure-based mechanism was developed for sensing the presence of, and estimating concentration values of, specified chemical components in a sample gas to which the mechanism is exposed, where the concentrations may be as low as five parts per billion. The mechanism receives a sample gas, converts the gas information received to a change in an electrical parameter value (EPV) sensed at each of an array of separately functionalized carbon nanotubes (CNTs), estimates which of a group of specified chemical components is present and the associated chemical concentrations in the sample gas, formats information concerning the chemical components sensed in the sample gas, and transmits this information to selected recipients. The specified chemical components and the corresponding concentration values are displayed on a cellphone screen, a tablet screen, or a computer screen. Optionally, the information is compensated by removing the effects of the presence of ambient gas components that are not of concern in the sample gas.

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White Papers

Differential Nonlinearity in Analog Measurements
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How to Turn Your Engineers Into Product Design Superheroes
Sponsored by arena solutions
Remediation and Prevention of Moisture in Electronics
Sponsored by multisorb technologies
All About Aspheric Lenses
Sponsored by edmund optics
Evolution of the Modern Receiver in a Crowded Spectrum Environment
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RF & MW Control Products in Silicon
Sponsored by avnet

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