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Senba sensor Stock Code : 300701

LDR Sensor

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PROD Model:φ20
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 2856K)
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

Standard Type and Specifications

SpecificationTypeMaximum VoltageMaximum power



Spectrumpeak valueLight resistance(10Lux)(KΩ)Dark resistance(MΩ)Response time(ms)
φ20 seriesGL20516500500-30~+70℃5605- 1013030
GL20528500500-30~+70℃56010- 2023030
GL20537-1500500-30~+70℃56020- 3033030
GL20537-2500500-30~+70℃56030- 5053030
GL20539500500-30~+70℃56050- 10083030





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 the size for LDR?

φ3 series, φ4 series, φ5 series, φ7 series, φ10 series, φ12 series, φ20 series.

2. What is your production capitable?

5 million Pieces per Month

3. Packaging information.

100pcs per small package,1000pcs per big package.

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SENBA Sensing Technology Co.,Ltd.(stock code:300701), was founded in 2005, with the focus on producing the top quality photoelectric components, such as PIR sensors, Photoresistors,Light Sensors, Flame detectors etc. Our strategic goal is to master the core technology.