Hellma 666-F7 Didymium Glass Filter for testing the wavelength accuracy and the photometric accuracy, 1/Pk - 666F7-323

UV/VIS Certified Reference Materials

Hellma F2 Neutral Density Glass Filter, Neutral Density Glass NG11 (0.25 Abs), for checking photometric accuracy in the Vis range, 405-890 nm, 1/Pk

Product Number: 666F7-323

Hellma Analytics neutral density glass filters are made from filter materials produced by Schott AG, which were selected on account of their homogeneity and stability. Thanks to a relatively constant transmittance within the wavelength range of 405 nm to 800 nm, they have been used to check photometric accuracy and linearity in the visible wavelength range (> 405 nm) for decades.

Please note, the thickness of the filter is set at the manufacturing so that the specified nominal optical density (values from 0.04 to 3.0 Abs) obtained at 546.1 nm. This results in slightly increasing absorptions at shorter wavelengths.Regularly using certified reference materials from Hellma Analytics will ensure you obtain accurate measurement results in the long run and will meet your internal quality standards with ease. At the same time, you will achieve international comparability of your measurement results.

Certified Reference Materials from the Hellma Analytics’ Calibration Laboratory (according to DIN EN ISO 17025) are traceable to primary references of NIST (National Institute of Standards and Technology) and are in accordance with the most important Pharmacopoeias (EP, DAB, USP).

Specifications:

Many sizes and types of cells are available... please contact our Sales Team with your requirements or browse the online catalogue below.

• Hellma Absorption Cuvettes
• Hellma Fluorescence Cuvettes
• Hellma Cuvettes for Special Applications
• Hellma CELLect Range Cuvettes
• Hellma UV/Vis Calibration Standards
• Hellma Certified Optical Reference Materials
• Hellma Optical Probes and Measuring Cells
• Hellma Quartz Microplates & Accessories