integrator

One that integrates.

An instrument for mechanically calculating definite integrals.

An instrument for performing numerical integrations.

That which integrates; esp., an instrument by means of which the area of a figure can be measured directly, or its moment of inertia, or statical moment, etc., be determined.

A person who, or a device which integrates

A device which calculates definite integrals

Any electronic device that sums a measurement over time

a measuring instrument for measuring the area of an irregular plane figure