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  2. 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 ...

  3. 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.

  4. Open collector - Wikipedia

    en.wikipedia.org/wiki/Open_collector

    For NPN open collector outputs, the emitter of the NPN transistor is internally connected to ground, [1] so the NPN open collector internally forms either a short-circuit (technically low impedance or "low-Z") connection to the low voltage (which could be ground) when the transistor is switched on, or an open-circuit (technically high impedance ...

  5. File:Higashi Shimizu Frequency Converter - Schematic.svg

    en.wikipedia.org/wiki/File:Higashi_Shimizu...

    English: Higashi Shimizu Frequency Converter (B2B), principle schematic, original installation Deutsch: Higashi Shimizu Glichstromkurzkupplung (GKK), Prinzipschaltung, Originalaufbau Date

  6. 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.

  7. Float (liquid level) - Wikipedia

    en.wikipedia.org/wiki/Float_(liquid_level)

    Liquid level floats, also known as float balls, are spherical, cylindrical, oblong or similarly shaped objects, made from either rigid or flexible material, that are buoyant in water and other liquids. They are non-electrical hardware frequently used as visual sight-indicators for surface demarcation and level measurement. They may also be ...

  8. RF switch - Wikipedia

    en.wikipedia.org/wiki/RF_switch

    An RF switch or microwave switch is a device to route high frequency signals through transmission paths. RF (radio frequency) and microwave switches are used extensively in microwave test systems for signal routing between instruments and devices under test (DUT). Incorporating a switch into a switch matrix system enables you to route signals ...

  9. Schmitt trigger - Wikipedia

    en.wikipedia.org/wiki/Schmitt_trigger

    When the signal reaches a given level it switches from its low to high state. Level detection: The Schmitt trigger circuit is able to provide level detection. When undertaking this application, it is necessary that the hysteresis voltage is taken into account so that the circuit switches on the required voltage.

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