Mechanical Diesel Flow Meters are used for flow measurement of low, medium viscosity fluids such as diesel, fuel, lubricant oil, and other special fluids compatible with the construction material.Oval gear flow meters are a type of positive displacement meter. As liquid through the meter, pair of oval-shaped gears is forced to rotate by the flow of the liquid. These gears mesh together & force a finite amount of liquid through the meter. A sensor or mechanical drive detects the rotation of the gears to determine the displaced volume of liquid. The faster the flow rate, the faster the gear turns.The Oval gear flow meter comprises oval-shaped, geared rotors that rotate within a housing of specified geometry. Fluid differential pressure causes the inter-meshing gears to rotate, trapping a ''pocket'' of fluid between the gear and the outer housing and subsequently emp-tying the fluid pocket into the downstream flow. The capillary action of the metered fluid forms a liquid seal. Each pocket holds a precise and known volume of fluid so counting the pocket frequency gives a measurement of the volumetric flow rate. 

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