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Senba Sensing

Visible Light Sensor

Visible Light Sensor

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Visible Light Sensor

PROD Model:φ7

Maximum Applied Voltage: the maximum voltage that can be continuously applied to a component in the dark

Dark Resistance: resistance value at 10 seconds after 10Lux illumination is turned off

Maximum Power Consumption: maximum power consumption when the ambient temperature is 25 ° C

Bright Resistance: after 2 hours of exposure with 400-600Lux light, the
test value under 10Lux light of standard light source (color temperature

γ Value: logarithm of the ratio of the standard resistance value at 10Lux illuminance to 100Lux illuminance

γ= Lg(R10/R100) /Lg (100/10) =Lg(R10/R100)


A photoresistor is a resistance made of a
semiconductor material whose conductivity changes with the change of
illuminance. This feature is used to make photoresistors of different
shapes and light-receiving areas. Photoresistors are widely used in
toys, lamps, cameras and other industries.


Epoxy encapsulation

Good reliability

Small size

High sensitivity

Fast response

Good spectral characteristics




Design considerations

Photoresistors are less light-sensitive devices than photodiodes or phototransistors: the two latter components are true semiconductor devices, while a photoresistor is a passive component and does not have a PN-junction. The photoresistivity of any photoresistor may vary widely depending on ambient temperature, making them unsuitable for applications requiring precise measurement of or sensitivity to light photons.


Photoresistors come in many types. Inexpensive cadmium sulfide cells can be found in many consumer items such as camera light meters, clock radios, alarm devices (as the detector for a light beam), nightlights, outdoor clocks, solar street lamps and solar road studs, etc.


1.What is an LDR (Light Dependent Resistor)?

An LDR is a component that has a (variable) resistance that changes with the light intensity that falls upon it. This allows them to be used in light sensing circuits.

SpecificationTypeMaximum VoltageMaximum power



Spectrum peak valueLight resistance(10Lux)(KΩ)Dark resistance(MΩ)Response time(ms)
φ7 seriesGL7516150100-30~+70℃5405- 100.53030
GL7528150100-30~+70℃54010- 2013030
GL7537-1150100-30~+70℃56020- 3023030
GL7537-2150100-30~+70℃56030- 5043030
GL7539150100-30~+70℃56050- 10083030
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