Used to enhance device interactivity, portability, and comfort.

Mobile Devices: G-sensors, gyroscopes, fingerprint sensors, facial recognition cameras, and barometers (for navigation and altitude positioning) in smartphones.

Wearable Devices: Heart rate sensors, blood oxygen sensors, body temperature sensors, and accelerometers (pedometers).

Smart Home: PIR sensors (for motion-activated lights), smoke detectors, gas leak sensors, smart meters, and temperature and humidity sensors (for automatic air conditioning adjustment).