IoTClass / Inside the measurement
Conceptual · not to scale

Inside a Hall-effect sensor

Peel from the case to the element. Follow the readout through this conceptual model.

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The full text version below describes every layer. All measurement explanations are available without 3D.
Case: three-lead packageThe dark Hall-sensor package has three leads extending from it.

Drag to rotate; pinch to zoom. With the view focused: arrow keys rotate, + / − zoom, 1–3 choose a layer, Home resets rotation and zoom. Step advances to the next layer; Reset returns to the case and default view. Layer buttons select a view directly. The page does not move on its own.

Layer 1 of 3 / Outside

Case: three-lead package

The dark Hall-sensor package has three leads extending from it.

Teaching view: The dark package surrounds the Hall sensing chip, with three leads extending below it. Peel away the cover to see the chip that responds to the magnetic field.

The measurement to rememberA Hall-effect sensor outputs a voltage that varies with magnetic field strength. [Evidence-Based Comparison]

Full text version · every layer

1 · Case: three-lead package

The dark Hall-sensor package has three leads extending from it.

Teaching view: The dark package surrounds the Hall sensing chip, with three leads extending below it. Peel away the cover to see the chip that responds to the magnetic field.

2 · Connections: chip and leads

A small magnet and a Hall-effect sensor can measure wheel or shaft speed, detect a nearby object, or sense position without contact. [Evidence-Based Comparison]

Teaching view: Gold wires connect the dark sensing chip to the metal leads. The sensor produces a voltage that changes with magnetic field strength, so a nearby magnet can make movement measurable without contact.

3 · Element: Hall sensing area

A Hall-effect sensor detects magnetic field strength directly. [Evidence-Based Comparison]

A Hall-effect sensor outputs a voltage that varies with magnetic field strength. [Evidence-Based Comparison]

Teaching view: The gold square marks a thin sensing area on the chip. A supplied current flows through it. A magnetic field across the sensing area pushes moving electric charges toward one side, creating a voltage across the area. The readout uses this voltage to sense the magnetic field.

Explode separates the proposed layers; X-ray makes the case translucent. These are teaching views. No commercial sensor construction or wiring is specified.