
The Thermo Helios Alpha 9423 UVA 1000A is a compact UV-Vis spectrophotometer with a 190–1100 nm wavelength range for routine and research laboratory applications.

Acetone calibration standard for verification of UV-VIS spectrophotometers according to USP <857>. Designed for stray light testing in the 250–330 nm UV range and supplied in a hermetically sealed cuvette.