Traceable Absorbance Filters

These Neutral Density Absorbance Filters are compatible with all Thermo Scientific UV-Visible Spectrophotometers and fit into any cell holder that accommodates standard 10mm pathlength cuvettes.  They are NPL and NIST traceable via the ISO/IEC Standard 17025 accredited calibration process, and are supplied in a wooden box with a certificate of calibration.

Neutral Density Absorbance Filters are calibrated at 546nm and available in a set of four or eight.  The set of four includes glass filters with nominal values of 0.5A, 1.0A, 2.0A, and one clear glass filter for use as a blank.  The set of eight includes glass filters with nominal values of 0.1A, 0.2A, 0.5A, 1.0A, 1.5A, 2.0A, 2.5A, 3.0A and one clear glass filter for use as a blank.