Kjeldahl apparatus is employed to measure organic nitrogen (N₂) and proteins contained within various chemicals. This is measured using the Kjeldahl digestion process. Kjeldahl apparatuses find wide application within the fields of food, environmental, urea and chemical industries and are often fitted together with laboratory water distillers. https://www.bionicsscientific.com/water-distiller/kjeldahl-digestion-distillation-unit.php