We can supply 5 sets of calibrated filters.

• Set of 2 Wavelength filters Holmium and Didymium                                                    Part No. 950-100
• Set of 4 calibrated Neutral density filters                                                                        Part No. 950-200
• Set of 2 Stray light filters  220nm and 340nm                                                                 Part No. 950-300
• Pharmacopoeia test set for wavelength, absorbance and stray light                         Part No. 950-500
• Resolution test set                                                                                                                Part No. 960-600

All sets are issued with a calibration certificate which is traceable to international standards.

The Neutral Density filters are calibrated at 546nm, however additional wavelengths can be specified.

Please contact us by telephone or email below.