Definition of spectrometer. 1  1 : an instrument used for measuring wavelengths of light spectra. 2  2 : any of various analytical instruments in which an emission (as of particles or radiation) is dispersed according to some property (as mass or energy) of the emission and the amount of dispersion is measured nuclear magnetic resonance spectrometer.
1 bar is equal to 1000 millibars. Just like how there are 1000 millilitres in a litre, and 1000 milliseconds in a second. 1 millibar = 0.001 bars.
One millibar = 0.001 bar = 0.750 torr = 100 Pa. Pascal (Pa). 1 pascal = a force of 1 Newton per square meter. 1 Newton is the force required to accelerate 1 kilogram one meter per second per second = 1 kg Â· m/s2; this is actually quite logical for physicists and engineers. 1 pascal = 10 dyne/cm 2 = 0.01 mbar. 1 atm = 101,325 Pascals = 760 mm Hg = 760 torr = 14.7 psi.