Glass holders for liquid cuvettes can also be controllably heated (tempered). There are also accessories for preheating the cuvettes outside the spectrometer (thermostat). More info here.

Near-infrared transmission spectra (FT-NIR) can also be obtained on spectrometers Nicolet iS50, iS20 and iS10 with a suitably selected set of components (detector, beam splitter, radiation source).