Stranaska CA2M 705 Metal-on-Quartz Filters Neutral Density 10, 30, 90

Description

Excellent condition. Recertified in Dec 2019 and has not been used since. Came out of Pharma metrology lab after facility was shut down. Let me know if you have any questions or need additional pictures or information.
CA2M 705
STRANASKA® CA2M 705 – Metal-on-Quartz Photometric Standard
This reference material artifact, which is patterned after the NIST SRM 2031 and NIST SRM 2031a measurement standards, is intended for the verification of the transmittance and/or absorbance scales of molecular absorption spectrophotometers in the ultraviolet (UV), visible (VIS) and short-wave near infrared (NIR) regions of the electromagnetic spectrum. It is comprised of two metal-on-quartz filters (nominal 10%T and 30%T) and one fused-silica filter (nominal 90%T) which are provided in a protective canister for storage and transportation purposes. The corresponding nominal transmittance densities of the three filters are 1.0, 0.5 and 0.04, respectively. Each filter is individually certified for transmittance and transmittance density at ten (10) wavelengths: 250.0 nm, 280.0 nm, 340.0 nm, 360.0 nm, 400.0 nm, 465.0 nm, 500.0 nm, 546.1 nm, 590.0 nm and 635.0 nm. The science-based calibration procedure ensures rigorous measurement traceability of the certified photometric values and uncertainties to the NIST SRM 2031 series.
Condition is "Used".
Shipped with USPS Priority Mail.