Photoelectric Sensors | Optical Sensor | RS Components
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    Photoelectric Sensors

    What are Photoelectric Sensors?

    Photoelectric sensors determine the distance, absence, or presence of physical objects by emitting a field or beam of electromagnetic radiation. An object is detected by measuring alterations in the return signal, this is achieved as sensors have an Emitter for emitting light and a Receiver for receiving light. There are 3 main types of photoelectric sensors, through-beam, retro-reflective and diffuse, which vary slightly in the way they function.

    The basic function of each is to detect the presence or absence of objects or measure the distance to the object. You can learn more in our complete guide to photoelectric sensors.

    Types of Photoelectric Sensors:

    Through-beam Sensors

    Through Beam Sensors (aka thru-beam) rely on two separate housings, one for the transmitter and one for the receiver, with the transmitter providing a continuous beam of light to the receiver. Each time an object passes through the beam this interrupts the signal between the transmitter and receiver, which in turn causes the receiver to send an electrical signal to the output. Through-beam sensors are suited to long-distance sensing and can detect almost any object, irrespective of colour or angular motion.

    Retro-reflective Sensors

    Retro-reflective photoelectric sensors (retroreflective) have both the transmitter and receiver contained within the same housing but require a reflector opposite to the sensor. The reflector bounces the light beam back to the transmitter until an object breaks the beam. Objects which are highly reflective such as aluminium require sensors with polarising filters. The filter allows the sensor to acknowledge that the reflected light from reflecting materials is different from the reflector.

    Diffuse Sensors

    Diffuse sensors (proximity sensor) are easier to install as only one device must be mounted. This is because the transmitter and receiver are contained within one housing. Diffuse sensors use the reflection from the target object within a predetermined sensing range.

    The transmitter sends out a continuous beam of light, once this hits the target it is diffused in all directions, a part of this light is reflected and recognised by the receiver, the receiver then sends an electrical signal to the output. A special type of diffused mode is background suppression which enables the user to precisely control the sensing range.

    Applications of Photoelectric Sensors

    Photoelectric Sensors can be used in various settings, some of which include:

    • Food Industry
    • Pharmaceutical Industry
    • Packaging Plants
    • Automotive Industry
    • Doors & Gates

    Browse the broad range of Photoelectric Sensors RS Components have to offer and order today for next day delivery.

    5732 표시되는 제품 Photoelectric Sensors

    SICK
    Block
    Retroreflective
    7 m
    PNP
    Cable
    -
    -
    -
    30V
    4 Pin Connector
    LED
    IP66, IP67, IP69K
    -
    -
    <330 μs
    -
    Metal
    +60°C
    -40°C
    -
    W12-3
    SICK
    Barrel
    Energetic
    1 mm → 900 mm
    Light/Dark Switching, PNP
    M12 Connector
    -
    -
    -
    30V
    4 Pin Connector
    -
    IP67
    100 mA
    -
    0.0005 seconds
    -
    Nickel Plated
    +55°C
    -25°C
    -
    V180-2
    Omron
    Compact
    Diffuse
    1 m
    PNP
    M12 Connector
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    E3Z
    Pepperl + Fuchs
    Block
    Retroreflective
    0 → 7.5 m
    NPN/PNP
    M8 4 Pin Connector
    -
    -
    IO-LINK
    30V
    4 Pin Connector
    LED
    IP67, IP69, IP69K
    100 mA
    IO-Link
    500 μs
    -
    PC
    +60°C
    -40°C
    Panel Mount
    OBR7500
    Pepperl + Fuchs
    Block
    Retroreflective
    20 m
    PNP
    4-Terminal Screw
    -
    -
    -
    30V
    -
    LED
    IP67
    200 mA
    -
    <=1.5 ms
    -
    PBT
    +55°C
    -25°C
    -
    -
    Banner
    Block
    Through Beam
    50 mm
    NPN
    M12 Connector
    -
    -
    -
    30V
    Connector
    LED
    IP67
    -
    -
    850 μs
    -
    Thermoplastic
    +70°C
    -20°C
    Threaded
    QS18
    SICK
    Cylindrical
    Energetic
    340 mm
    PNP
    Cable
    Light / Dark switching
    -
    -
    30V
    Cable 2 Meter
    LED
    IP67
    100 mA
    -
    1.25 ms
    -
    Metal, Nickel Plated Brass/PA
    +70°C
    -25°C
    Panel Mount
    V12-2
    Telemecanique Sensors
    Cylindrical
    Through Beam
    30 m
    Discrete
    1 male connector M12
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    SICK
    Block
    Retroreflective
    6 m
    PNP
    M12 Connector
    -
    -
    -
    30V
    4 Pin Connector
    PinPoint LED
    IP67
    -
    -
    650 μs
    -
    Plastic
    +55°C
    -25°C
    -
    G6
    SICK
    Rectangular
    Retroreflective
    0 → 1.2 m
    NPN
    Cable
    Light Switching
    -
    -
    30V
    Cable with Connector
    LED
    IP67
    20 mA
    -
    10 ms
    -
    ABS, Plastic
    +55°C
    -25°C
    -
    WL2S
    SICK
    Block
    Retroreflective
    0.03 → 6 m
    PNP
    M8 3 Pin Connector
    Dark Switching
    -
    -
    30V
    3 Pin Connector
    PinPoint LED
    IP67, IP69K
    100 mA
    -
    625 μs
    -
    Stainless Steel, Stainless Steel V4A
    +55°C
    -25°C
    Threaded
    G6
    SICK
    Miniature
    Energetic
    2 → 18 mm
    PNP
    Cable
    Light / Dark switching
    -
    -
    24V
    Cable 2 Meter
    LED
    IP67
    -
    -
    0.5 ms
    -
    Plastic
    +55°C
    +40°C
    -
    W2
    SICK
    Rectangular
    IO-LINK
    1200 mm
    PNP / NPN
    4-pin, Male Connector M12
    Light Switching
    -
    IO-LINK
    30V
    4-pin, Male Connector M12
    Visible Red
    IP66, IP67, IP69
    100 mA
    IO-Link
    0.5 ms
    -
    Metal
    +55°C
    -20°C
    Panel Mount
    WTB12L
    SICK
    Miniature
    Retroreflective
    4.5 m
    PNP/NPN
    3-pin connector, M8
    Light / Dark switching
    -
    -
    30V
    M8 Connector
    LED
    IP66, IP67, IP69
    25 mA
    IO-Link
    = 500 μs
    UL
    Plastic
    +60°C
    -40°C
    Wall Mount
    WLD4FP
    Baumer
    Fork
    Fork Sensor
    50 mm
    PUSH/PULL
    M8 3 Pin Connector
    Light / Dark switching
    -
    -
    30V
    M8 3 Pin Connector
    Red LED
    IP67
    -
    -
    0.1 ms
    -
    Die Cast Zinc
    +60°C
    -25°C
    Screw
    OG
    SICK
    Cylindrical
    Retroreflective
    0.05 → 5.5 m
    NPN
    Cable
    Light / Dark switching
    -
    -
    30V
    Cable 2 Meter
    LED
    IP67
    30 mA
    -
    0.5 ms
    -
    Plastic
    +55°C
    +25°C
    -
    V180
    SICK
    -
    -
    0.2 → 200 m
    -
    Male Connector M12
    -
    -
    Ethernet
    30V
    Ethernet Connector
    -
    IP65
    -
    Ethernet
    -
    -
    -
    +55°C
    -20°C
    -
    ISD400
    SICK
    Block
    Retroreflective
    3 m
    NPN, PNP, PUSH/PULL
    M12 Connector
    -
    -
    -
    30V
    4 Pin Connector
    LED
    IP67
    -
    IO-Link
    3 ms
    -
    Plastic
    +60°C
    -40°C
    -
    Reflex Array
    Panasonic
    Block
    Diffuse
    300 mm
    PNP
    4-Pin M8 Connector
    -
    -
    -
    24V
    -
    Infrared
    IP67
    100 mA
    -
    <=1 ms
    -
    PBT
    +55°C
    -25°C
    -
    CX-400
    SICK
    Block
    Distance
    200 → 10000 mm
    NPN
    M12 5 Pin Connector
    -
    -
    -
    30V
    5 Pin Connector
    Laser Light
    IP65
    100 mA
    -
    20 ms
    -
    Metal
    +65°C
    -30°C
    Panel Mount
    Dx50
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