Light Sensors

The light sensor is a passive device that converts the light energy into an electrical signal output. Light sensors are more commonly known as Photoelectric Devices or Photo Sensors because they convert light energy (photons) into electronic signal (electrons). Phototransistors, photoresistors, and photodiodes are some of the more common type of light intensity sensors.


Photoelectric sensors use a beam of light to detect the presence or absence of an object. It emits a light beam (visible or infrared) from its light-emitting element. A reflective-type photoelectric sensor is used to detect the light beam reflected from the target. A beam of light is emitted from the light emitting element and is received by the light receiving element. Both the light emitting and light receiving elements are contained in a single housing. The sensor receives the light reflected from the target.


A phototransistor, on the other hand, uses the level of light it detects to determine how much current can pass through the circuit. So, if the sensor is in a dark room, it only lets a small amount of current to flow. If it detects a bright light, it lets a larger amount of current flow. A photoresistor is made of cadmium sulphide whose resistance is maximum when the sensor is in dark. When the photoresistor is exposed to light, its resistance drops in proportion to the intensity of light. When interfaced with a circuit and balanced with potentiometer, the change in light intensity will show up as change in voltage. These sensors are simple, reliable, and cheap, used widely for measuring light intensity.


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Contract pricing display is unavailable at the moment. Prices shown are standard retail prices, orders placed will have contract pricing applied when processed.

  Manufacturer Part No Order Code Manufacturer / Description
Availability Price For
Price
Quantity
KPS-3227SP1C
KPS-3227SP1C - Ambient Light Sensor, KPS Series, Phototransistor, 60 Vceo, 0.4 Vce(sat)

2373478

Ambient Light Sensor, KPS Series, Phototransistor, 60 Vceo, 0.4 Vce(sat)

KINGBRIGHT

SENSOR, OPTICAL, PHOTOTRANSISTOR, NPN; Sensor Output:Voltage; Wavelength of Peak Sensitivity:580nm; Supply Voltage Min:0.4V; Supply Voltage Max:60V; Ambient Light Sensor Case Style:SMD; No. of Pins:4Pins; Operating Temperature Min:-40°C; Operating Temper

  • 1,135 available for 3 - 4 day despatch
+ Check Stock & Lead Times

  • 1,135 available for 3 - 4 day despatch: (UK stock) Order before 19:35 Mon-Fri (excluding National Holidays)

  • 2,000 more will be available on 10/25/20
  • More stock available week commencing 12/14/20

    Restricted Item
    ISL76671AROZ-T7A
    ISL76671AROZ-T7A - Special Function IC, Ambient Light Sensor, 1.8 V to 3 V, ODFN-6

    2544741

    Special Function IC, Ambient Light Sensor, 1.8 V to 3 V, ODFN-6

    RENESAS

    AMBIENT LIGHT SENSOR, AEC-Q100, ODFN-6; Sensor Output:Voltage; Wavelength of Peak Sensitivity:550nm; Supply Voltage Min:1.8V; Supply Voltage Max:3.3V; Ambient Light Sensor Case Style:ODFN; No. of Pins:6Pins; Operating Temperature Min:-40°C; Operating Tem

    • 387 available for 3 - 4 day despatch
    + Check Stock & Lead Times

    • 387 available for 3 - 4 day despatch: (UK stock) Order before 19:35 Mon-Fri (excluding National Holidays)

  • 6,000 more will be available on 10/20/20
  • More stock available week commencing 10/19/20

    Restricted Item
    VEML6075
    VEML6075 - Light Sensor, UVA and UVB, I2C, 1.7 V to 3.6 V

    2523611

    Light Sensor, UVA and UVB, I2C, 1.7 V to 3.6 V

    VISHAY

    LIGHT SENSOR, DIGITAL / I2C; Sensor Output:Digital (I2C); Sensing Range Max:365mm; Supply Voltage DC Min:1.7V; Supply Voltage DC Max:3.6V; Output Current:400µA; Product Range:UV Sensor

    No Longer Manufactured

    Restricted Item
    SI1153-AA00-GM
    SI1153-AA00-GM - Integrated Ambient Light Sensor, 1.6V to 3.6V Supply, DFN-10

    2769154

    Integrated Ambient Light Sensor, 1.6V to 3.6V Supply, DFN-10

    SILICON LABS

    AMBIENT LIGHT SENSOR, I2C, DFN-10; Supply Voltage Min:1.6V; Supply Voltage Max:3.6V; Ambient Light Sensor Case Style:DFN; No. of Pins:10Pins; Operating Temperature Min:-40°C; Operating Temperature Max:85°C; Product Range:Si1153 Series; SVHC:No SVHC (12-J

    No Longer Manufactured

    Re-reel
    Restricted Item
    AMS302.
    AMS302. - Ambient Light Sensor, High Sensitivity, Through Hole, 1.5 Vdc to 6 Vdc

    2448039

    Ambient Light Sensor, High Sensitivity, Through Hole, 1.5 Vdc to 6 Vdc

    PANASONIC

    LIGHT SENSOR, 6V, 580NM, THD; Sensor Output:Current; Wavelength of Peak Sensitivity:580nm; Supply Voltage Min:1.5V; Supply Voltage Max:6V; Ambient Light Sensor Case Style:Through Hole; No. of Pins:2Pins; Operating Temperature Min:-30°C; Operating Tempera

    No Longer Manufactured

    Restricted Item
    MAX44000GDT+T
    MAX44000GDT+T - IC, Special Function, Ambient Light Sensor, 1.7 V-3.6 V supply, OTDFN-6

    2514191RL

    IC, Special Function, Ambient Light Sensor, 1.7 V-3.6 V supply, OTDFN-6

    MAXIM INTEGRATED PRODUCTS

    AMBIENT/INFRARED PROXIMITY SENSOR, OTDFN; Supply Voltage Min:1.76V; Supply Voltage Max:3.6V; Ambient Light Sensor Case Style:OTDFN; No. of Pins:6Pins; Operating Temperature Min:-40°C; Operating Temperature Max:105°C; Product Range:MAX44000 Series; SVHC:N

    No Longer Manufactured

    Re-reel
    Packaging Options
    Suggested replacement for:2514191RL
    2514191 in Cut Tape
    Restricted Item
    APDS-9301-020
    APDS-9301-020 - Ambient Light Sensor, APDS-9301, Miniature, Digital, chipLED SMD, 2.7 Vdc to 3.6 Vdc

    2497389

    Ambient Light Sensor, APDS-9301, Miniature, Digital, chipLED SMD, 2.7 Vdc to 3.6 Vdc

    BROADCOM

    AMBIENT LIGHT PHOTO SENSOR, DIGITAL; Sensor Output:I2C Digital; Wavelength of Peak Sensitivity:-; Supply Voltage Min:2.7V; Supply Voltage Max:3.6V; Ambient Light Sensor Case Style:ChipLED; No. of Pins:6Pins; Operating Temperature Min:-30°C; Operating Tem

    No Longer Manufactured

    Cut Tape
    Packaging Options
    Suggested replacement for:2497389
    2497389RL in Re-reel
    Restricted Item