The oval gear flow meter is a kind of direct-reading accumulating liquid flowmeter. The oval gear flow meter adds a transmitter mechanism to the basic flowmeter. It can be equipped with flux and instant flux. It possesses many virtues such as a large testing range, high precision etc.. The oval gear meter is widely used in flux measurement in industrial fields such as oil development, oil refining, chemical, commerce, and oil storage.

An oval gear flow meter is installed electrical impulses signal transmitter in the counting mechanism of the oval gear meter. For I.E. one permanent magnet disk is fixed on the transducer is installed on the counter. The transducer possesses merits such as long life, strong capacity of anti-interference, wide working frequency, no spark, fearless of oil, grease and dust, small measurement, and convenient installation. The solid testing signals can be obtained without contact when the magnet accesses the induction surface with the action distances.