There are two models of insertion paddle type flow meters from Flomec, the DP490 and DP525. These two flow meters are both cost effective stainless steel flow meters ideally suited to measurement the flow rates of water, fuels and other low viscosity liquids. Insertion flow meters are installed with the paddle metering head approximately 1/8th into the pipe to minimise the pressure drop. The DP490 flow meter is suitable for measuring pipes with a diameter of 40mm up to 900mm (1.5″ to 35″), while the DP525 is suitable for pipe sizes of 50mm up to 2500mm (2″ to 100″). These flow meters do not require external power when used with the flow rate totalisers, however certain optional extra, such as the high temperature and non-magnetic models do require external power.