what materials can be tested with an eddy current tester
Eddy-current testing The two major applications of eddy current testing are surface inspection and tubing inspections. Surface inspection is used extensively in the aerospace industry, but also in the petrochemical industry. The technique is very sensitive and can detect tight cracks. Surface inspection can be performed both on ferromagnetic and non-ferromagnetic materials.[5][6]
Cuvette Traditional ultraviolet–visible spectroscopy or fluorescence spectroscopy typically use samples that are liquid - either a liquid substance or a substance dissolved in a solvent. The liquid sample is placed in a cuvette, and the cuvette is then placed in a spectrophotometer for testing. The cuvette can be made of any material that is transparent in the range of wavelengths being tested. Historically, reusable quartz cuvettes were required for measurements in the ultraviolet range, since glass and most plastic absorb light in this wavelength range, creating interference. Now, disposable plastic cuvettes manufactured using specialized ultraviolet-transparent plastics are available. Glass, plastic (traditional or ultraviolet-transparent), and quartz cuvettes are all suitable for measurements made at higher wavelengths (e.g. in the visible spectrum).