What type of tool is influenced by magnetic flux to sense field strength?

A Hall effect sensor is a type of transducer that directly responds to the presence of a magnetic field. It operates based on the Hall effect, which occurs when a current-carrying conductor is placed in a magnetic field perpendicular to the direction of the current. This interaction causes a voltage to be generated across the conductor, which is proportional to the strength of the magnetic field. Therefore, Hall effect sensors are commonly used in applications to measure magnetic field strength, position, or rotational speed due to their ability to convert magnetic flux variations into measurable electrical signals.

This characteristic makes Hall effect sensors particularly valuable in automotive and industrial applications for tasks such as detecting the position of moving parts or monitoring the presence of magnetic fields. Other choices such as voltage meters, amperage meters, or resistance meters do not have a direct relationship with magnetic fields, as they are designed to measure electrical parameters like voltage, current, and resistance respectively, rather than responding to magnetic flux.