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| Secondary standards for calibrating spectrophotometers To maintain constant good measurement results, a regular review of the accuracy of the spectrophotometer is required. With the use of certified reference materials from Hellma Analytics, you make sure that your equipment qualifications meet the requirements of the pharmacopoeias and fulfill your internal quality requirements, at the same time you reach the international comparability of your measurement results. The certified reference materials (calibration standards) of the DIN EN ISO 17025 accredited Hellma Analytics calibration laboratory are traceable to the primary standards of NIST (National Institute of Standards and Technology) and meet the requirements of the major pharmacopoeias (e.g. EP, DAB, USP). Your benefits: -High quality of the measurement results -International comparability of measurement results -Meeting the requirements of the major pharmacopoeias (EP, DAB, USP) -Results traceable to NIST primary standards -30 years warranty* on the reference materials Scope of delivery: -Certified reference materials (Calibration Standards) in quality storage box -DAkkS Calibration Certificate (DIN 17025) -Handling guidelines Check for photometric accuracy Product Specification: Product Type: 666-F4 Description: Neutral density glass filter F4, 1.0 absorbance Wavelength: 440 - 635 nm | |
| Catalogue Number | 6.801 868 |
| Manufacturer | Hellma |
| Manufacturer P/n | 666F4-37 |
| Fisher Ref | 3076245 |
| VWR Ref | 634-9696 |
| Type | 666-F4 |
| PK | 1 |
| Wavelength nm | 440 - 635 |
| Description | Neutral density glass filter F4, 1.0 absorbance |
| Thermo Fisher: | 3076245 |
| VWR: | 634-9696 |