Non-contact infrared sensors measure rotor temperature without a sliding thermocouple. They are useful for pad comparisons, cooling-duct tests, and track sessions when mounting and emissivity are handled carefully.

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What the Sensor Needs#

Most modules (for example MLX90614-class breakout boards) need:

• Stable 3.3 V or 5 V supply as specified
• Common ground with the logger
• Clear optical path to the rotor
• Firmware/logging that samples fast enough to catch a braking event

Mechanical Mounting#

1. Build a rigid bracket off a non-rotating upright/hub feature - not the dust shield alone if it flexes.
2. Aim at a consistent radius on the rotor (friction ring or hat - pick one and keep it).
3. Protect the optic from rocks and brake dust with a shroud that does not trap water against the lens.
4. Strain-relieve the cable so full lock and suspension travel cannot yank the connector.
5. Confirm clearance through bump, droop, and steering lock.

Electrical Installation#

1. Fuse the supply near the source.
2. Route signal wires away from coil-on-plug leads and alternator cables.
3. Use connectors that tolerate heat near the wheel well.
4. Log left and right channels with matching aim if you compare sides.

Accuracy Limits#

Treat data as comparative unless you calibrate against a known reference.

Safety#

This is instrumentation. It does not replace proper fluid, pad compound, or bias setup. Mounting hardware must never be able to foul the wheel.

Validation#

• Live values move when brakes are applied
• Corners track similarly on a straight stop
• Wiring survives a full session without intermittent dropouts