Warburg apparatus

noun

War·​burg apparatus ˈwȯr-ˌbərg-  ˈvär-ˌbu̇rk- 

: an analytic apparatus that employs a manometer to determine changes in the amount of gas produced or absorbed by a test sample kept at constant temperature in a flask of constant gas volume and is used especially in the study of cellular respiration and metabolism and of some enzymatic reactions (as fermentation)