For wavelength calibration, Avantes offers a variety of sources including Argon, Mercury-Argon, Neon, Zinc, and Cadmium. All Avantes spectrometers are factory wavelength calibrated and do not require recalibration as they have fixed slits and optics. For those customers who wish to do their own calibrations, the AvaLight-CAL light sources can be used for recalibration purposes. For auto-calibration, AvaSoft-Fill provides a calibration procedure to make this easy.