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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.

    5654 Producten voor Photoelectric Sensors

    SICK
    Barrel
    Energetic
    5 mm → 550 mm
    Light/Dark Switching, NPN
    Cable
    -
    -
    -
    30V
    -
    4 Wire
    -
    IP67
    100 mA
    -
    0.001 seconds
    -
    Nickel Plated
    +55°C
    -25°C
    -
    GR18
    SICK
    Rectangular
    Background Suppression
    3 m
    PNP / NPN
    4-pin, Male Connector M12
    Light / Dark switching
    -
    -
    30V
    -
    4-pin, Male Connector M12
    Visible Red
    IP67
    100 mA
    -
    1.67 ms
    -
    Plastic
    +60°C
    -30°C
    Panel Mount
    GTB20G
    Omron
    Block
    Retroreflective
    6000 mm
    PNP
    Cable
    Light Switching
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    SICK
    Block
    Background Suppression
    50 mm → 800 mm
    NPN
    Cable
    -
    -
    -
    30V
    -
    4 Wire
    Infrared
    IP67
    500 mA
    -
    0.09 seconds
    -
    Plastic
    +50°C
    -25°C
    -
    PowerProx
    Carlo Gavazzi
    Rectangular
    Diffuse Reflective
    0 → 200 mm
    PNP
    Connector M8
    Light / Dark switching
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    SICK
    Block
    Energetic
    40 mm → 1 m
    Light/Dark Switching, NPN
    Cable
    -
    -
    -
    30V
    -
    4 Wire
    -
    IP66, IP67
    100 mA
    -
    0.0025 seconds
    -
    Plastic
    +60°C
    -30°C
    -
    W11-2
    SICK
    Cylindrical
    Proximity
    50 mm
    PNP
    4-pin, Male Connector M12
    Light Switching
    -
    -
    30V
    -
    4-pin, Male Connector M12
    Infrared
    IP67
    100 mA
    -
    2 ms
    -
    Metal
    +70°C
    -25°C
    Threaded
    VTF18
    SICK
    Barrel
    Energetic
    1 mm → 1.1 m
    Light/Dark Switching, PNP
    M12 Connector
    -
    -
    -
    30V
    -
    4 Pin Connector
    -
    IP67
    100 mA
    -
    0.0005 seconds
    -
    Nickel Plated
    +55°C
    -25°C
    -
    V180-2
    SICK
    Block
    Through Beam
    0 → 15 m
    Light/Dark Switching, NPN
    M8 Connector
    -
    -
    -
    30V
    -
    4 Pin Connector
    Polarized Red Light
    IP67
    100 mA
    -
    0.0005 seconds
    -
    Plastic
    +55°C
    -25°C
    -
    G6
    SICK
    Barrel
    Retroreflective
    5 m
    PNP
    M12 Connector
    Dark Switching
    -
    -
    30V
    -
    M12 4 Pin Connector
    LED
    IP67
    15 mA
    -
    0.5 ms
    -
    Plastic
    +55°C
    +40°C
    M18
    ZLD18
    SICK
    Block
    Through Beam
    2 m
    PNP
    M8 4 Pin Connector
    Light / Dark switching
    -
    IO-LINK
    30V
    -
    4 Pin Connector
    PinPoint LED
    IP66, IP67
    100 mA
    IO-Link
    300 → 450 μs
    -
    ABS, Plastic
    +60°C
    -40°C
    Threaded
    W4S-3
    SICK
    Rectangular
    Through Beam
    5 m
    NPN
    2 m, 4-wire, Cable
    Light / Dark switching
    -
    -
    30V
    -
    2 m, 4-wire, Cable
    Visible Red
    IP66, IP67
    100 mA
    -
    0.5 ms
    -
    Stainless Steel
    +70°C
    -30°C
    Panel Mount
    WSE4S
    SICK
    Block
    Retroreflective
    15 m
    Relay
    Cable
    -
    240V
    -
    240V
    -
    5 Pin Connector
    LED
    IP66, IP67
    -
    -
    15 ms
    -
    Plastic
    +55°C
    -25°C
    -
    W280-2
    SICK
    Barrel
    Through Beam
    0 → 15 m
    Light/Dark Switching, PNP
    M12 Connector
    -
    -
    -
    30V
    -
    4 Pin Connector
    Infrared
    IP67, IP68, IP69K
    100 mA
    -
    0.0005 seconds
    -
    Stainless Steel
    +55°C
    -25°C
    -
    GR18 Inox
    SICK
    Rectangular
    Through Beam
    15 m
    NPN
    2 m, 4-wire, Cable
    Light / Dark switching
    -
    -
    30V
    -
    2 m, 4-wire, Cable
    Visible Red
    IP67
    100 mA
    -
    0.62 ms
    -
    Stainless Steel
    +55°C
    -25°C
    Panel Mount
    GSE6
    SICK
    Block
    Retroreflective
    0.08 → 12 m
    NPN
    M8 3 Pin Connector
    Light / Dark switching
    -
    -
    30V
    -
    3 Pin Connector
    Laser Light
    IP65
    100 mA
    -
    0.25 ms
    -
    ABS/PC/POM, Plastic
    +50°C
    -10°C
    Threaded
    W100 Laser
    SICK
    Block
    Retroreflective
    2.4 m
    NPN
    M8 Connector
    -
    -
    -
    30V
    -
    4 Pin Connector
    LED
    IP67
    -
    -
    500 μs
    -
    Plastic
    +55°C
    -25°C
    -
    W150
    SICK
    Block
    Retroreflective
    12 m
    PNP
    Cable
    -
    -
    -
    30V
    -
    4 Pin Connector
    -
    IP66, IP67, IP69K
    -
    -
    500 μs
    -
    Plastic
    +50°C
    -10°C
    -
    W9
    SICK
    Cylindrical
    Energetic
    5 → 550 mm
    PNP
    Cable
    Light / Dark switching
    -
    -
    30V
    -
    Cable 2 Meter
    PinPoint LED
    IP67
    30 mA
    -
    1 ms
    -
    Metal
    +55°C
    +25°C
    -
    GR18S
    SICK
    Barrel
    Energetic
    3 mm → 115 mm
    Light/Dark Switching, NPN
    Cable
    -
    -
    -
    30V
    -
    4 Wire
    -
    IP67
    100 mA
    -
    0.001 seconds
    -
    Nickel Plated
    +55°C
    -25°C
    -
    GR18
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