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  2. Hum (system) - Wikipedia

    en.wikipedia.org/wiki/Hum_(system)

    The system is composed of two devices: a diagnostics reader which connects to a vehicle's OBDII and a speaker with Bluetooth connectivity that can be clipped to the visor. [1] A monthly subscription is required, but also includes a mobile application for reviewing collected data and receiving alerts as well as roadside assistance. [ 2 ]

  3. Motion detector - Wikipedia

    en.wikipedia.org/wiki/Motion_detector

    A motion detector attached to an outdoor, automatic light. A motion detector is an electrical device that utilizes a sensor to detect nearby motion (motion detection).Such a device is often integrated as a component of a system that automatically performs a task or alerts a user of motion in an area.

  4. Car alarm - Wikipedia

    en.wikipedia.org/wiki/Car_alarm

    A car alarm is an electronic device installed in a vehicle in an attempt to discourage theft of the vehicle itself, its contents, or both. Car alarms work by emitting high-volume sound (often a vehicle-mounted siren, klaxon , pre-recorded verbal warning, the vehicle's own horn, or a combination of these) when the conditions necessary for ...

  5. Parking sensor - Wikipedia

    en.wikipedia.org/wiki/Parking_sensor

    The electromagnetic parking sensor (EPS) was re-invented and patented in 1992 by Mauro Del Signore. [2] Electromagnetic sensors rely on the vehicle moving slowly and smoothly towards the object to be avoided. Once an obstacle is detected, the sensor continues to signal the presence of the obstacle even if the vehicle momentarily stops.

  6. Back-up beeper - Wikipedia

    en.wikipedia.org/wiki/Back-up_beeper

    Back-up beepers or an observer are required by OSHA for earth-moving vehicles with an obstructed view to the rear and no one on the ground to help guide the driver. [9] OSHA regulation 29 CFR Part 1926.601(b)(4) requires "a reverse signal alarm audible above surrounding noise level", but only when the motor vehicle has "an obstructed view to the rear".

  7. Passive infrared sensor - Wikipedia

    en.wikipedia.org/wiki/Passive_infrared_sensor

    A passive infrared sensor (PIR sensor) is an electronic sensor that measures infrared (IR) light radiating from objects in its field of view. They are most often used in PIR-based motion detectors . PIR sensors are commonly used in security alarms and automatic lighting applications.