13:40 Mar-12-2019 Re: panametrics videoscanIn Reply to CArlos galán at 04:08 Mar-12-2019 (Opening).
Carlos, the probe you are asking about is a direct contact normal incidence shear wave probe.
It is a large element (1 inch diameter) very low frequency (250 kHz) unit. This must have been ordered for a very specific project, probably something related to civil engineering applications (e.g. concrete).
15:20 Mar-19-2019 Re: panametrics videoscanIn Reply to Carlos Galán at 15:06 Mar-19-2019 .
Carlos, you can use the probe with any instrument that has a single channel pulse-echo capability. However, the problem will be getting a useful response. The MX2 has 2 monoelement (Lemo) connectors so it can be used in either pulse-echo or through-transmission. But the pulser is only adjustable from 30 ns to 1,000 ns. This range would accommodate 17MHz down to about 500kHz. As a result you will not be able to optimise for the 250kHz nominal frequency of the probe.
On the receiver side you will be close to the edge of performance but it should be OK as the receiver bandwidth is 0.25 MHz to 28 MHz (-3 dB)
15:46 Mar-19-2019 Re: panametrics videoscanIn Reply to Carlos Galán at 15:06 Mar-19-2019 .
I have verified. It is in the Panametrics 2004 catalog V150. Normal Incidence Shear Wave 0.25 MHz, 1.0 inch dia.
Panametrics had many such specialty probes that were very useful for special applications
17:51 Mar-20-2019 Re: panametrics videoscanIn Reply to Carlos Galán at 17:27 Mar-20-2019 .
Carlos, to couple SH shear waves from a piezo ceramic requires a nonNewtonian viscous fluid. Honey is a popular and inexpensive couplant used by many. There is a new polymeric couplant now available from Innovation Polymers (http://www.innovationpolymers.ca/). The owner, Rick MacNeil, calls his new couplant Aquabond. It is VERY viscous and not water soluble. This makes it ideal for long term coupling without worrying about the couplant evaporating like regular gels). It is also usable over a large temperature range. I cannot find the new material on the website yet so perhaps just send Rick an email if you want more information.
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