Flow metering insert and/or device

A flow metering insert for a drip chamber suitable for use in intravenous administration, the insert comprising:

• a primary liquid flow channel comprising:
• an inlet passage;
• an outlet;
• and
• a flow-resistant passage between the inlet passage and the outlet;
• and
• a flow indicating channel in communication with the primary liquid flow channel between the inlet passage and the flow-resistant passage;
• wherein the flow-resistant passage and the flow indicating channel is/are at least partially defined by one or more first recesses and/or open channels in a surface of the insert and, when the insert is inserted into a said drip chamber, the flow-resistant passage and the flow indicating channel are formed or located between the insert and a wall of the said drip chamber;
• and
• wherein the flow-resistant passage provides a resistance to a liquid flow through the primary liquid flow channel such that liquid is forced into the flow indicating channel and reaches a level or height in the flow indicating channel proportional to the rate of liquid flow through the primary liquid flow channel.