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  2. Float switch - Wikipedia

    en.wikipedia.org/wiki/Float_switch

    A pedestal sump pump with a float switch. A float switch is a type of level sensor, a device used to detect the level of liquid within a tank. The switch may be used to control a pump, as an indicator, an alarm, or to control other devices. One type of float switch uses a mercury switch inside a hinged float.

  3. Level sensor - Wikipedia

    en.wikipedia.org/wiki/Level_sensor

    The sensors emit high frequency (20 kHz to 200 kHz) acoustic waves that are reflected back to and detected by the emitting transducer. [3] Ultrasonic level sensors are also affected by the changing speed of sound due to moisture, temperature, and pressures. Correction factors can be applied to the level measurement to improve the accuracy of ...

  4. Zellweger off-peak - Wikipedia

    en.wikipedia.org/wiki/Zellweger_off-peak

    Zellweger is the brand name of an electric switching device also known as a Ripple Control Receiver used to control off-peak electrical loads such as water heaters by switching these loads OFF over peak energy use times of the day and switching them ON after peak energy use times of the day, hence the term 'off peak' control.

  5. Water detector - Wikipedia

    en.wikipedia.org/wiki/Water_detector

    A water detector is an electronic device that is designed to detect the presence of water for purposes such as to provide an alert in time to allow the prevention of water leakage. A common design is a small cable or device that lies flat on a floor and relies on the electrical conductivity of water to decrease the resistance across two contacts.

  6. HVAC control system - Wikipedia

    en.wikipedia.org/wiki/HVAC_control_system

    The program features include time schedules, set points, controllers, logic, timers, trend logs, and alarms. The unit controllers typically have analog and digital inputs that allow measurement of the variable (temperature, humidity, or pressure) and analog and digital outputs for control of the transport medium (hot/cold water and/or steam ...

  7. List of sensors - Wikipedia

    en.wikipedia.org/wiki/List_of_sensors

    MAP sensor; Mass airflow sensor; Oil level sensor; Oil pressure sensor; Omniview technology; Oxygen sensor (O 2) Parking sensor; Radar gun; Radar sensor; Speed sensor; Throttle position sensor; Tire pressure sensor; Torque sensor; Transmission fluid temperature sensor; Turbine speed sensor; Variable reluctance sensor; Vehicle speed sensor ...

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