Level Sensors | Water & Oil Level Sensors | RS Components
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    Level Sensors

    What are Level Sensors?

    Level sensors monitor, maintain, and measure liquid levels to determine how full or how empty a container, tank or silo is. Level sensors provide an output electrical signal at predetermined levels to communicate when to open or close control valves. You can find out more in our comprehensive level sensors guide.

    Level Sensor Types

    The choice of sensors is usually determined by which substance is being measured, the environment in which the sensor is to be used and in which position the sensor needs to be mounted. Also, the application will determine the measurement principle used, such as capacitive, guided wave radar or hydrostatic level measurement. The most common types of level sensors are:

    Capacitive level switches

    • Capacitive level switches provide a basic full/empty level indication determined by the mounting position of the sensor. This type of switch is non-contact and uses a sensing field to determine liquid levels. Capacitive sensors provide accurate switching even with heavy residue build-up.

    Vibrating level probes

    • Vibrating level probes use a rod or a fork that constantly produce high-frequency vibrations. When the vibrating probe comes into contact with the medium, the vibration changes and the vibrating level switch outputs a switching command. Vibrating level switches are used as overfill protection devices or low-level indicators in liquids as well as in granular and powder bulk solids.

    Conductive level switches

    • Conductive level switches are sensors that use stainless steel probes with an electrical contact output to measure a specific liquid level. Used in conjunction with a level control relay to set and monitor each probe. Applications include ponds, reservoirs, sumps, pharmaceuticals, closed vessels and open tanks.

    Ultrasonic level sensors

    • Ultrasonic level sensors generate ultrasonic sound pulses that are reflected by the surface of a liquid medium. The time travelled by the ultrasonic pulse is calculated by the sensor which then determines the distance of the liquid to give an accurate fill level. The ultrasonic sensor's response is influenced by turbulence, pressure, moisture, and temperature.

    Applications of Level Sensors

    Common applications of Water & Oil Level Sensors include:

    • Manufacturing
    • Automotive Industry
    • Water Treatment
    • Pharmaceutical Processes
    • Power Generating Plants

    Browse the broad range of Level Sensors RS Group has to offer and order today for next day delivery.

    1353 Products showing for Level Sensors

    SICK
    TDR Level Sensor
    -
    PNP
    Stainless Steel 303
    450mm
    IO-LINK
    -20°C
    +150°C
    -
    30V
    G3/4
    100 mA
    16bar
    G3/4
    -
    -
    -
    -
    LFP0450
    Endress+Hauser
    Radar Level Measurement
    Wall Mount
    -
    PVDF
    5 → 300m
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    ATEX
    Micropilot FMR20
    SICK
    TDR Level Sensor
    Flange Mount
    NPN, PNP
    Steel 303
    900mm
    IO-LINK
    -20°C
    +60°C
    -
    30V
    -
    100 mA
    16bar
    M12
    -
    -
    -
    -
    LFP
    Flowline
    Ultrasonic Level Transmitter
    Vertical
    -
    PC
    -
    -
    -35°C
    +60°C
    -
    24V
    -
    20 mA
    2bar
    -
    FKM
    -
    -
    -
    EchoSonic
    Vega
    Radar
    1.5" G/BSP Thread
    4-20mA
    PVDF
    15m
    Hart
    -40°C
    +80°C
    -
    35V
    -
    20 mA
    3bar
    -
    FKM
    -
    Liquids/solids
    -
    VEGAPULS 21
    Flowline
    Ultrasonic Level Transmitter
    Vertical
    -
    Polycarbonate
    4.6m
    -
    -35°C
    +60°C
    -
    24V
    -
    20 mA
    30psi
    -
    Viton
    -
    -
    -
    EchoSonic
    Siemens
    Ultrasonic
    Clamp Mount
    -
    PBT
    -
    -
    -30°C
    +60°C
    -
    30V
    -
    -
    -
    R 2 in BSPT
    -
    -
    -
    -
    SITRANS LU150
    Flowline
    Reflective Ultrasonic Liquid Level Transmitter
    Horizontal, Vertical
    2 Wire, 4 to 20 mA
    Polycarbonate (Cap), Polypropylene
    -
    -
    -40°C
    +80°C
    -
    28V
    -
    20 mA
    2bar
    -
    -
    -
    -
    -
    UG06
    Endress+Hauser
    Point Level Switch
    Flush Mount
    -
    Aluminium, Polyester, Stainless Steel
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    ATEX
    Soliphant FTM50
    Vega
    Radar
    1.5" G/BSP Thread
    4-20mA
    PVDF
    5m
    Hart
    -40°C
    +80°C
    -
    35V
    -
    20 mA
    3bar
    -
    FKM
    15 m
    Liquids/solids
    -
    VEGAPULS C21
    Endress+Hauser
    Ultrasonic
    Wall Mount
    4-20mA
    PBT-FR
    8m
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    ATEX, IECEx
    Prosonic T FMU30
    Flowline
    Ultrasonic Level Transmitter
    Vertical
    -
    PC
    -
    -
    -40°C
    +71°C
    -
    28V
    -
    20 mA
    2bar
    -
    FKM
    -
    -
    -
    EchoSonic
    WIKA
    Level Sensor
    Cable Mount
    4-20mA
    FEP
    10m
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    LH-10
    Banner
    Radar
    Barrel M30
    NPN/PNP, Analog 4-20mA
    PBT
    -
    IO-LINK
    -40°C
    +65°C
    -
    30V dc
    M30
    -
    -
    -
    -
    -
    -
    -
    T30R
    Endress+Hauser
    Ultrasonic
    Wall Mount
    4-20mA
    PBT-FR
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    ATEX, IECEx
    FMU30
    Endress+Hauser
    Ultrasonic
    Wall Mount
    4-20mA
    PBT-FR
    8m
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    Prosonic T FMU30
    Vega
    Radar
    1.5" G/BSP Thread
    4-20mA
    PVDF
    5m
    Hart
    -40°C
    +80°C
    -
    35V
    -
    20 mA
    3bar
    -
    FKM
    15 m
    Liquids/solids
    -
    VEGAPULS C22
    Flowline
    Ultrasonic Level Sensor
    Vertical
    -
    PC
    1.2m
    -
    -35°C
    +60°C
    -
    24V
    -
    20 mA
    2bar
    -
    FKM
    -
    -
    -
    EchoPod
    SICK
    Ultrasonic Level Sensor
    -
    PNP
    Stainless Steel
    -
    -
    -25°C
    +70°C
    -
    9 → 30V
    M12
    -
    6bar
    -
    -
    -
    -
    -
    UP56
    Siemens
    Radar Level Transmitter
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    SITRANS LR150
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