The K450X Rotary-Pumped Carbon Coater was primarily designed for scanning electron microscopy (SEM) specimen coating applications (eg EDS and WDS). With fully automatic control and an automatically operated source shutter, the system protected specimens during carbon out-gassing. The K400X Semi-automatic Carbon Coater was a semi-automatic version of the K450X with manual control of the shutter operation, and also fitted with a static specimen stage. Discontinued in 2010. For carbon supplies, see: carbon rod and carbon fibre.