An intravenous set with an automatic stopping mechanism in the drip chamber comprising a drip chamber (16) wherein the top portion of the drip chamber (16) has a cap (17) with a sharp tooth (18) extending radially outwards for puncturing a container or bottle (15)； wherein a lower portion of the drip chamber (16) is connected to a joint or stem (23)； wherein the joint or stem 23 is connected to a flexible tube (19) ending in a valve (13) to be connected to a catheter； wherein the flexible tube (19) has a manual flow control device (11)； wherein inside the drip chamber (16) contains a stopper (22) for automatic control of flow of fluid from the drip chamber (16)； wherein the stopper (22) comprises of a lower part or diaphragm (3), a middle part or stem (4) and a upper part (2)； and wherein the stem (4) and the diaphragm (3) are connected by a stud (3), which stud is flexible and a part of the diaphragm (3)； and wherein the stopper (22) is submerged as fluid filled in the drip chamber (16), fluid flows through the exit (19) of the drip chamber (16) to cause the stopper (22) to fall, thereby stopping fluid exiting when the diaphragm (3) of the stopper (22) blocks the exit of the drip chamber (16) and fluid in the drip chamber (16) is used up.
