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    Banner 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.

    1117 Products showing for Banner Photoelectric Sensors

    Banner
    Block
    Retroreflective
    5 m
    NPN/PNP
    Cable
    -
    -
    -
    30V
    -
    -
    LED
    IP67
    25 mA
    -
    1 ms
    -
    Thermoplastic Polyester
    +70°C
    -20°C
    -
    -
    Banner
    Barrel
    Retroreflective
    3.5 m
    PNP
    M12 4 Pin Connector
    Light / Dark switching
    -
    -
    30V
    -
    -
    LED
    IP67
    25 mA
    -
    600 μs
    -
    ABS
    +70°C
    -20°C
    -
    QS18
    Banner
    Barrel
    Diffuse
    450 mm
    PNP
    M12 4 Pin Connector
    Light / Dark switching
    -
    -
    30V
    -
    -
    LED
    IP67
    25 mA
    -
    600 μs
    -
    ABS
    +70°C
    -20°C
    -
    QS18
    Banner
    Block
    Diffuse
    50 mm
    PNP
    M18 Connector
    -
    -
    -
    30V
    -
    Connector
    LED
    IP67
    -
    -
    850 μs
    -
    Thermoplastic
    +70°C
    -20°C
    Threaded
    QS18
    Banner
    Barrel
    Retroreflective
    2 m
    PNP
    4 Pin Connector
    -
    -
    -
    30V
    -
    -
    LED
    IP69K
    30 mA
    -
    3 ms
    -
    PBT Polyester
    +70°C
    -40°C
    -
    -
    Banner
    Block
    Diffuse
    450 mm
    PNP
    Cable
    -
    -
    -
    30V
    -
    -
    LED
    IP67
    100 mA
    -
    600 ms
    -
    ABS
    +70°C
    -20°C
    -
    QS18
    Banner
    Barrel
    Through Beam
    20 m
    -
    M12 4 Pin Connector
    Light / Dark switching
    -
    -
    30V
    -
    -
    LED
    IP67
    25 mA
    -
    375 μs, 750 μs
    -
    ABS
    +70°C
    -20°C
    -
    QS18
    Banner
    Block
    Retroreflective
    3.5 m
    PNP
    4 Wire Cable 2 m
    Light / Dark switching
    -
    -
    30V
    -
    M18 Connector
    LED
    IP67
    100 mA
    -
    600 μs
    -
    ABS
    +70°C
    -20°C
    Threaded
    QS18
    Banner
    Barrel
    Retroreflective
    6.5 m
    PNP
    M12 4 Pin Connector
    -
    -
    -
    30V
    -
    -
    LED
    IP67
    25 mA
    -
    600 μs
    -
    ABS
    +70°C
    -20°C
    -
    QS18
    Banner
    Barrel
    Retroreflective
    6.5 m
    PNP
    Cable
    -
    -
    -
    30V
    -
    -
    LED
    IP67
    25 mA
    -
    600 μs
    -
    ABS
    +70°C
    -20°C
    -
    QS18
    Banner
    Barrel
    Diffuse
    0 → 100 mm
    PNP
    M12 4 Pin Connector
    Light / Dark switching
    -
    -
    30V
    -
    M12 Connector
    Infrared
    IP69K
    150 mA
    -
    3 ms
    -
    Thermoplastic PET
    +70°C
    -40°C
    Threaded
    S18
    Banner
    Barrel
    Background Suppression
    200 mm
    PNP
    M12 4 Pin Connector
    -
    -
    -
    30V
    -
    M12 4 Pin Connector
    Infrared
    IP67, IP68, IP69K
    25 mA
    -
    2 ms
    -
    PBT Polyester
    +70°C
    -40°C
    Flange Mount
    T18-2
    Banner
    Barrel
    Diffuse
    450 mm
    PNP
    Cable
    -
    -
    -
    30V
    -
    -
    LED
    IP67
    25 mA
    -
    600 μs
    -
    ABS
    +70°C
    -20°C
    -
    QS18
    Banner
    Block
    Through Beam
    30 m
    NPN/PNP
    M12 4 Pin Connector
    -
    -
    -
    30V
    -
    -
    LED
    IP67
    25 mA
    -
    1 ms
    -
    Thermoplastic Polyester
    +70°C
    -20°C
    -
    -
    Banner
    Barrel
    Diffuse
    450 mm
    NPN
    Cable
    -
    -
    -
    30V
    -
    -
    LED
    IP67
    25 mA
    -
    600 μs
    -
    ABS
    +70°C
    -20°C
    -
    QS18
    Banner
    Block
    Diffuse
    380 mm
    NPN/PNP
    M12 4 Pin Connector
    -
    -
    -
    30V
    -
    -
    LED
    IP67
    25 mA
    -
    1 ms
    -
    Thermoplastic Polyester
    +70°C
    -20°C
    -
    MINI BEAM
    Banner
    Barrel
    Diffuse
    100 mm
    PNP
    M12 4 Pin Connector
    Light / Dark switching
    -
    -
    30V
    -
    M12 Connector
    LED
    IP67
    25 mA
    -
    850 μs
    -
    ABS
    +70°C
    -20°C
    Threaded
    QS18
    Banner
    Barrel
    Through Beam
    60 m
    -
    Cable
    -
    250V
    -
    250V
    -
    -
    LED
    IP67
    -
    -
    15 ms
    -
    ABS
    +70°C
    -20°C
    -
    QS30
    Banner
    Barrel
    Retroreflective
    3.5 m
    NPN
    Cable
    -
    -
    -
    30V
    -
    -
    LED
    IP67
    25 mA
    -
    600 μs
    -
    ABS
    +70°C
    -20°C
    -
    QS18
    Banner
    Block
    Diffuse
    3 m
    NPN/PNP
    M12 4 Pin Connector
    -
    -
    -
    30V
    -
    -
    LED
    IP67
    50 mA
    -
    2 ms
    -
    Reinforced Thermoplastic Polyester
    +70°C
    -40°C
    -
    Q45
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