Supplier: ASTM International
Description: Monitoring Crack Extension in Fracture Toughness Tests by Ultrasonics Volume 4, Issue 6 (November 1976) An ultrasonic method was used to observe the onset of crack extension and to monitor continued crack growth in fracture toughness specimens during three-point bend tests. A 20-MHz transducer
Standards and Technical Documents - Ultrasonics - Power measurement - Radiation force balances and performance requirements -- IEC 61161:2006
Description: uncertainties. This International Standard is applicable to: - the measurement of ultrasonic power up to 1 W based on the use of a radiation force balance in the frequency range from 0,5 MHz to 25 MHz; - the measurement of ultrasonic power up to 20 W based on the use of a radiation force balance
Supplier: Trans-Tek, Inc.
Description: or 4-20 mA output versions also available.
- Form Factor: Stand Alone
- DC Voltage Input: Yes
- DC Current Input: Yes
- Voltage Output: Yes
Supplier: Measurement Specialties, Inc.
Description: The EPIH is a subminiature pressure sensor, specifically designed for Dynamic and High Frequency measurements with resonant frequency up to 1.7 MHz. Available with many various housings, EPIH is one of the smallest pressure sensors in the world. The EPIH is offered in pressure ranges from 0-5
- Working Pressure Range: 5 to 300 psi
- Device Category: Transducer
- Pressure Reading: Absolute, Gauge, Sealed
- Operating Temperature: -40 to 248 F
Supplier: Steiner & Martins, Inc.
Description: Piezo Ceramic Transducer For Mist Generation Part Number: SMIST20F17SAN -- SIMILAR PRODUCTS Piezoelectric ceramic transducer for mist generation application. Piezo Material: SM112 Dimensions: 20mm diameter Resonant frequency fr: 1.70 MHz±50 KHz
- Diameter or Height: 20000 µm
Supplier: Ohmic Instruments Co.
Description: . They are tested and calibrated using NIST traceable standards. UPM-DT-10AV - Electronic ULTRASOUND POWER METER. Resolution 20 mW or 15 mW in grams mode. Range 0 to 30 Watts at a frequency of 0.5 to 10 MHZ. DIgital display, RS-232 interface. Carrying case.
- Form Factor: Portable / Hand Held / Mobile
- Technology: Ultrasonic
Supplier: Allied Electronics, Inc.
Description: your needs: 100 MHz, 300 MHz, 500 MHz and 1 GHz bandwidth Up to 4 GSa/s sample rate Unique 2+16-channel,4+16-channel mixed signal oscilloscope (MSO) and 2- or 4-channel digital storage oscilloscope (DSO) models Industry-leading performance: Standard 1 Mpts MegaZoom III deep memory;up to 8 Mpts
- Bandwidth: 5.00E8 Hz
- Number of Input Channels: 2 (# channels)
- Features: Integral Display
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High�?frequency Intraductal Ultrasound Images of Biliary Tract Lesions: Experimental Studies
Abstract: To investigate the differences in images obtained with a 3.75 MHz, 7.5 MHz or 20 MHz transducer , 27 stones, five debris samples, and three cholesterol polyps were examined in a water tank.
Quantifying Atherosclerosis: IVUS Imaging For Lumen Border Detection And Plaque Characterization
Comparing IVUS ultrasound probes, the lumen border is better depicted in images acquired with a 64-element phased-array 20 MHz transducer in comparison with those acquired with a single element mechanically rotating 45 MHz transducer.
20 MHz/40 MHz dual element transducers for high frequency harmonic imaging
...imaging can be separated into two categories: anterior segment imaging and posterior segment imaging. currently available commercial ultrasonic biomicroscopy (Ubm) systems use 35 to 50 mHz transducers for anterior segment imaging , whereas 10 to 20 mHz transducers are used for imaging...
Systematic study of high-frequency ultrasonic transducer design for laser-scanning photoacoustic ophthalmoscopy
For the 20 MHz transducer , the peak-to-peak amplitude of the echo signal was 648 mV without gain at a reflection dis- tance of 6 mm and a time delay of 8 μs.
A highly efficient 20 MHz piezo-composite transducer for nondestructive characterization of multilayer plastics
Measurement of thin barrier layer samples using the 20MHz composite transducer demonstrated consistent results for a thickness of 0.084 mm, while the standard 20 MHz transducers are only able to resolve thickness above 0.100 mm.
World Congress on Medical Physics and Biomedical Engineering, September 7 - 12, 2009, Munich, Germany
For the detection of the optoacoustic signals, a 7,5 MHz and a 20 MHz transducer were used.
Photoacoustic tomography of rat brain in vivo using multibandwidth ultrasonic detection
The diameters of the active areas are 6 mm for the 2.25MHz, 10 mm for the 3.5 MHz transducer, 2 mm for the 10 MHz transducer and 3 mm for the 20 MHz transducer , respectively.
High-frequency harmonic imaging of the eye
Scans were made of the posterior pole of a normal human subject using a 20 MHz transducer .
Nonlinear ultrasound propagation through layered liquid and tissue-equivalent media: computational and experimental results at high frequency
Simulation results for beam propagation in water, tissue-mimicking phantom and water from the circular focused 20 MHz transducer .
Synthetic aperture imaging with a virtual source element
The 20 MHz transducer has a 0.25 inch diameter circular aperture and a 0.5 inch focal distance giving it .
Anisotropy in bovine skeletal muscle in vitro: frequency dependent attenuation and backscatter coefficient over a wide range of frequencies
...over the range 2 to 30 MHz and the slope of attenuation was observed to be highly anisotropic (mean values were 3.1 dB/cm.MHz for propagation along the fibers with the 5 and the 20 MHz transducers and 0.9 dB/cm...
An investigation of backscatter power spectra from cells, cell pellets and microspheres
Of note the specular reflection on the pellet surface using the 20MHz transducer , absent for the 40MHz transducer.
2-2 PZT-polymer composites for high frequency (>20 MHz) ultrasound transducers
A 20 MHz transducer was constructed to compare the technology to results from the literature.
Principles of high�?frequency ultrasonography for investigation of skin pathology
Assessment of skin melanoma thickness using transducers of 100 MHz frequency has better agreement with histology, compared with ultrasonography with 20 MHz transducers .