Product Code: EKE 084 The apparatus consists of a volume measuring polythene tube running along both sides of a scale and connected at both ends to two mercury traps. This volume change gauge works on the principle of reversing the direction of flow when the limit of the volume change scale is reached.The number of cycles with the volume of fluid handled in each cycle provide the total volume change,whereas the sensitivity of 0.003 mi/mm with 6 ml volume of fluid per cycle has been realized by this sensitive volume gsuge.