Get your facts straight: Difference between Spectrometer vs Spectrophotometer

What is the difference between Spectrometer and Spectrophotometer?

Here are the answers from the web (various sources):

AZOPTICS diffferencebetween.com sciecing Physics.stackexchange.com2 Physics.stackexchange.com

All the answers seem very confusing.

So what exactly is the difference? Spectrometer is a instrument that can measure electromagnetic related properties. The operating wavelength region covers X-rays, UV, VIS, MIR and THz. Spectrophotometer on the other hand, is a subset of spectrometer and operating in the UV to NIR wavelength region.

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