The GDA series of glow discharge spectrometers is now available. The series features the Spectruma GDA and Spectruma GDA 750, two instruments that offer a combination of innovative analytical approaches and practical user interfaces. The 150 is designed for the needs of small and medium-sized heat treating and coating companies. The 750 is designed to analyze up to 62 elements in boundary layers of metallic materials in the lab. Coatings can be measured down to depths as low as 200 micrometers.