One of the spectrometers we use at AstroLAB is the StellarNet BLACK-Comet-CXR-SR-50. The BLACK-Comet has a 16-bit ADC, a 50 µm slit, and can measure light in the 220 – 1100 nm range at a resolution of 2.0 nm. The BLACK-Comet has concave gratings and has no mirrors for greater thermal stability. Great on a  sunny day! Learn more on the product page.

Find the calibration file here.