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20mm Photosensitive LDR Sensor

20mm Photosensitive LDR Sensor
20mm Photosensitive LDR Sensor
20mm Photosensitive LDR Sensor
20mm Photosensitive LDR Sensor
20mm Photosensitive LDR Sensor

(inc GST)

  • Stock: In Stock
  • SKU: FR-01-516
    10 or more ₹71
    50 or more ₹69

If you need a way to sense the level of ambient light then there is no easier way to do it without an LDR/photo-resistor. The resistance of Light Sensitive Photoresistor LDR changes with the change in the ambient light exposure on the surface of the sensor. Light Dependent Resistor is a type of photocell that finds excellent use in light sensing device applications, whether it is automatic outdoor light ON/OFF switch or an indoor automatic light switch.

Two Cadmium Sulphide PhotoConductive Cells with spectral responses similar to that of the human eye. Cell resistance falls with increasing light intensity. The 20mm LDR or photoresistor sensor works best in both light and dark regions. The photo-resistors are a staple of electronics.

Applications of this product include smoke detection, automatic lighting control, batch counting, and burglar alarm systems. Furthermore, some of the applications are given below.

  •  Analog Applications:

    • Electronics scales – dual cell
    • Automated rearview mirror
    • Camera exposure control
    • Auto slide focus – dual cell
    • Densitometer
    • Automatic gain control – modulated light source
  • Digital Applications:
    • Position sensor
    • Nightlight control
    • Automatic headlight dimmer
    • Streetlight control
    • Oil burner flame out
  • Other applications:
    • Switch
    •  Annunciator
    • Camera automatic photometry
    • Electronic toy
    • Industrial control
    • Light control lamp




  • small size
  • easy to use
  • work as ON/OFF switch
  • Quick Response time

Package Includes :

1 x 20mm Light Sensitive Photoresistor LDR.
Dark resistance

max. 2 kΩ


2 cm

Light Resistance

10 – 20 kΩ

No. of Pins



0.5 W (max)

Spectral Peak

560 nm


500 VDC (Max)

Questions1 Answers2 | Expand All
Can i get GST invoice for the order ?
Shubham Bhausaheb Modake
  • Yes, You can claim GST credit if you have a GST number. To do it you have to mention the GST number at the time of checkout. GST option appears in the Billing Address. If you are an existing customer of flyrobo then you can log in to your account ( Account → Address Book → Edit Address) and Then enter your GST number.
    FlyRobo[ 16/11/2022 ]
    Was this answer helpful?755
When will delivered order?
  • Order will be delivered within 1-3 days in metro city, 3-5 days in other city and 4-7 days in villages or small city. This is the average time of delivery in express shipping. but can change with different locations and different situations.
    FlyRobo[ 16/07/2021 ]
    Was this answer helpful?-1080
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