- Instrument for measuring (and sometimes recording) a spectrum
- An instrument which is utilized to obtain spectrums, by measuring wavelengths, energies, masses, ionization potentials, and so on. Examples include mass spectrometers, emission spectrometers, scintillation spectrometers, ionization spectrometers, nuclear magnetic resonance spectrometers, and acoustic spectrometers.
- A spectroscope which is equipped with a calibrated scale suitable for measurements of wavelengths, refractive indices, radiant intensities, or the like, pertaining specifically to light.
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