Diffuse reflectance wavenumber standard, certified, 1.25 in diameter, PTFE. Certified PTFE diffuse reflectance wavenumber standard, which has typical reflectance value of 99% and is spectrally flat over the UV-VIS-NIR spectrum in the range of 250–2500 nm. Reflective area 2 inch diameter. Supplied with complete diffuse reflectance data in wavenumbers, directly traceable to NIST. Housed in a durable Delrin holder with a protective cover.
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