PC water cooling flow meters allow you to monitor the rate of flow of the liquid in your system at a specific point. Some double as visual flow indicators with a clear window and an impeller showing the direction of flow. Some are blind fittings, measuring only flow rate. Note that a flow meter must have some form of software to interpret the speed signals it produces and display a number that represents those signals. Pick up a flow meter for your water cooling loop from TITAN RIG.