sequential spectrometer

A spectrometer which enables the intensity of several spectral bands of radiation to be measured one after the other in time, i.e. sequentially.
Source:
PAC, 1995, 67, 1725 (Nomenclature, symbols, units and their usage in spectrochemical analysis-IX. Instrumentation for the spectral dispersion and isolation of optical radiation (IUPAC Recommendations 1995)) on page 1729