Recertification - 666-F4 Glass Filter (Hellma Analytics)
Product Code: HELL666F4RE
Recertification of neutral density glass filter (1 Abs) with DAkkS Certificate
Wavelengths (nm): 440, 465, 546.1, 590, 635
** Hellma recommends inspection and recalibration of glass filters should be carried out every 12 months for the first 2 years of use, after that every 24 months.
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