Spectrophotometer Apparatus

NPL is seeking engagement from suppliers who can supply a spectrophotometer apparatus which can perform diffuse reflection measurements in UV/Vis/NIR wavelengths. UV/Vis/NIR Spectrophotometer, for diffuse reflection measurement. To include di (direct inclusive), de (direct exclusive) 0: 8 degrees and 0:45 degrees measurement geometries. Mandatory requirements: • Equipment must be compliant with all international standards: CE, UKCA etc. • Wavelength required: 200 nm to 2500 nm (optional up to 3300 nm) • Measurement geometries required: 0:8 degrees, 0:45 degrees, multi angle measuring • Data output: the raw uncorrected data needs to be accessible in a readable form compatible with our existing systems (for example txt, csv, Excel) • To measure sample of sizes 25 mm diameter to 100 mm diameter Other optional requirements: • The ability to program and save custom measurement sequence scripts • Ability to perform measurements in different positions on the sample • Horizontal and vertical sample mounting possible • Multiple sample accessory for automated sample changing. • To measure larger samples up to 460 mm x 460 mm. Information required: • A lab visit to demonstrate the equipment and software is preferred. • Give information on possible add on modules / options for the instrument • Give details of software and data output formats (ability to modify software) • Practical evidence that the dark signal is consistent across all ranges and detectors especially at low signal levels.