Graphite Kjeldahl Digester LKGD-A10 Labtron Graphite Kjeldahl Digester is an eco-friendly system with an anti-corrosive design and high-temperature infrared heating. It features 20 digestion programs with PID control, a temperature range of 5°C to 450°C, and ±1°C accuracy. With a 300 ml digestion tube capacity, it offers over-current, overload, and high-temp protection. Durable anti-oxidation graphite block and 5.7-inch color screen for ease of use.