1: You will not wear out a transducer in your lifetime. 2: We all like "exact" numbers, but sonic checking cylinder walls to within .005 (due to calibration frequency) is not going to make or break any decisions on usage. 3: I use atf as a coupler with my T-Mike.
1: You will not wear out a transducer in your lifetime. 2: We all like "exact" numbers, but sonic checking cylinder walls to within .005 (due to calibration frequency) is not going to make or break any decisions on usage. 3: I use atf as a coupler with my T-Mike.