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Teletest Teletest Focus+ was the first system to use long-range guided wave ultrasonic testing to detect corrosion in pipelines.

503 views Technical Discussions Hafiz Hafiz 14:31 Aug-22-2009 spatial resolution Dear Experts, I have some queries regarding the ultrasonic resolution. i did some study on ultrasonic transducer. i placed a transmitter & at the other end a receiver probe on the verticle column surface (non-invasive, with couplant) consist of water. my reason is to study/measure the air bubbles velocity released from the bottom of the column. if my freq is 40kHz, and taking v= 1500m/s (water), from v = f*lamda, the wavelength of the sound is 37.5mm. so, what is the minimum bubble size could be detected by the receiver probe? is it equivalent to the wavelength? because i did try smaller than the wavelength (25mm) and the receiver probe still gives the response. thank you         Reply  Translate  Close   Wieslaw Bicz Engineering, PBP Optel sp. z o.o., Poland, Joined Feb 2009, 252 Wieslaw Bicz Engineering, PBP Optel sp. z o.o., Poland, Joined Feb 2009 252 19:12 Sep-15-2009 Re: spatial resolution In Reply to Hafiz at 14:31 Aug-22-2009 (Opening). The detection of single bubbles has nothing to do with resolution. This would be the case, if you would be interested in differentiation between two bubbles situated close to each other. In you case the question will be: how strong is the signal reflected by the bubble and what is the sensitivity of your probe and electronics. The wave length is not significant in this case. It can be much larger than the bubble size.         Reply  Translate  Close   Product Spotlight ISAFE3 Intrinsically Safe Sensor System StandVallen-Systeme GmbH ISAFE3 intrinsically safe sensor system of Vallen Systeme is especially targeted at the petrochemica ... l - as well as oil and gas transportation industry. The sensor system is designed for permanent monitoring or periodic inspection tasks. Sensors are available for different AE-frequency ranges optimized for corrosion and fatigue crack detection and other applications. The ISAFE 3 sensor system consists of an AE-sensor (model ISAS3) certified according to ATEX/IEC for installation in zone 0, gas group IIC, IP68, 20 to +60 °C, and a signal isolator (model SISO3) certified for installation in zone 2. An ISAS3 sensor can be mounted in atmosphere or submerged, e.g. in water or crude oil. It is supported by mounting tools for temporary (magnets) or permanent (welded) installation. ISAFE3 supports automatic sensor coupling test and can be used with any AE signal processor supporting 28V supply at 90 mA peak, e.g. Vallen Systeme ASIP-2/A. > 2 Showcases AIS229 - Multipurpose Real Time System StandBALTEAU NDT Latest standard & automatic real time system developed by Balteau. The AIS229 has been designed to ... do series inspection in a wide variety of industry. Composed of a shielded cabinet, 5 axis manipulator, x-ray generator and tubehead from 160kV to 225kV, a fl at panel & much more, the AIS229 is most certainly one of the most multipurpose RTR system available on the market. > 5 Showcases3 Videos Panther StandEddyfi Technologies / M2M M2M PANTHER is a phased-array equipment designed for both desktop and industrial applications, offer ... ing unparalleled performance in a compact unit. It combines the speed required for industrial integrated Phased-Array Ultrasound (PAUT) solutions, with the most complete set of total focusing method (TFM) imaging techniques, making it the ultimate tool for R&D and procedure qualification. > 5 Showcases5 Videos Wireless TOFD scanner StandOKOndt GROUP Quick, accurate and highly reproducible welds testing. The System operates wirelessly and is compat ... ible with any type of Windows based Laptop, Desktop or Tablet. > 6 Showcases6 Videos more Showcases Share... Home Exhibition Archive Forum Jobs Members Events Directory NDT A-Z Advertise Privacy Policy Contact About © NDT.net - Where expertise comes together. The Largest Open Access Portal of Nondestructive Testing (NDT)- since 1996 We use technical and analytics cookies to ensure that we will give you the best experience of our website - More Info Accept top this is debug window