Light Sensors

Light Sensors

Light Dependent Photo Resistors, Photo Cells

Small, cost-effective, low-power, easy to use and highly durable sensors & photo resistors for light sensing applications.

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Key features of the LDR CDS Photo Cells:

  • Rated for operation over the -30C to +50C temperature range.
  • Suitable for use in photographic survey equipment, cameras and automatic light control devices.
  • Rated up to of 100Vdc and dissipate 50mW.
  • Exhibit a light resistance from 30Kohm to 0.3Mohm.

Part Number




Cadmium Sulfide LDR CDS Photo Cell

Data Sheet


More about Photo Resistors / LDRs (Light Dependent Resistors)

A Photo resistor, sometimes known as Light Dependent Resistor (LDR) is a resistor whose resistance value decreases as light intensity increases. In other words, it exhibits photoconductivity. Photocells can simply be described as a resistor that changes its resistive value (in ohms) depending on how much light is shining onto its surface.

We offer photo resistors / LDRs (Light Dependent Resistors) which use Cadmium Sulphide. These offer high sensitivity to illumination making them ideal for use in automatic sensing and switching devices.We also offer an alternative to cadmium, our LSL100 “Light Cell” solution. These sensors are small, inexpensive, low-power, easy to use and highly durable.

Sensors such as these can be used in dynamic compressors together with a small incandescent lamp or light emitting diode to control gain reduction.


  • Camera Light Meters.
  • Street Lights.
  • Clock Radios.
  • Alarms.
  • Remote Indoor Lighting.


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