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mfr. no.
Hellma (666-F201)
Description:
General description
Secondary calibration standard for photometric accuracy. Certified. Neutral Density Glass Filter F201, nominal value of the absorption 0.3 (peak positions in nm: 440; 465; 546,1; 590; 635)
Other Notes
The most current version of Hellma's handling guidelines for calibration standards can be accessed on the Hellma Analytics web site.