Fourier transform infrared (FTIR) spectrophotometers for scientific laboratory research use; spectrophotometers for measuring light absorbance, transmittance or reflectance for scientific laboratory use; measuring and testing apparatus, namely, optical spectrum analyzers, wavelength meters, interferometers, and electronic calibration devices for calibrating spectrophotometers; laboratory apparatus and instruments, namely, laboratory glassware in the nature of sample cells for spectrophotomete...