The performance and functions expected on a micro-Raman spectrometer are all provided with the NRS-5500/7500 Raman spectrometers, assuring consistent performance for rapid acquisition of high quality data with automated system control and minimal optical adjustments. For application expansion, an automated multi-grating turret, up to 2 detectors and a maximum of 8 lasers ranging from the UV through the NIR are capable of integration with the instrument system, all optical components are PC controlled for maximum flexibility with minimum user interaction.