The Black-Comet-HR concave grating spectrometers manufactured by StellarNet are designed for high-resolution applications. Available for measurements in the UV (200 to 600 nm) and visible (380 to 750 nm) ranges, the instruments achieve resolution of 0.4 nm. The 16-bit devices are plug-and-play USB 2.0-powered, shockproof and vibration-tolerant, have no moving parts, and include the SpectraWiz 32-bit spectrometer software and development kit. The software includes drivers and can be customized to run on Windows. It accurately measures wavelength emissions, reflectance, transmission, absorption, concentrations and absolute intensities. It has built-in applications for spectroradiometry, spectrocolorimetry, ChemWiz chemistry laboratory concentration analysis and UV-level monitors. The devices use a 40-mm-diameter holographic concave grating with aberration correction to provide good spectral imaging and to improve spectral shapes.