1. n. [Production Logging]

A device for measuring in situ the velocity of fluid flow in a production or injection well by measuring the transit time of a disturbance between two dielectric sensors a fixed distance apart. The device is a type of crosscorrelation flowmeter that uses several pairs of capacitance, or dielectric, sensors held on an arm to span the borehole.

See: crosscorrelation flowmeter,  flow profile,  flowmeter,  in situ,  production log