12mm GL12528 Light Sensitive Photoresistor LDR
The 12mm GL12528 Light Sensitive Photoresistor LDR exhibits a change in resistance corresponding to variations in ambient light exposure. When the light intensity on the sensor increases, the resistance across its two leads decreases. This Light Dependent Resistor, commonly known as an LDR, serves as a crucial component in light-sensing devices, whether for automatic outdoor light ON/OFF switches or indoor automatic light controls. Notably, the 12mm LDR or photoresistor sensor functions effectively in both illuminated and dim environments, making it highly versatile.
Featuring two Cadmium Sulphide PhotoConductive Cells with spectral responses similar to the human eye, this product demonstrates a decrease in cell resistance with rising light intensity. Its applications span a wide range, including smoke detection, automatic lighting control, batch counting, and burglar alarm systems. Below are some notable applications:
- Smoke detection systems
- Automatic lighting control systems
- Batch counting devices
- Burglar alarm systems
In various electronic circuits, LDRs or photo-resistors serve as indispensable tools for accurately sensing ambient light levels with minimal complexity.
Analog Applications:
- Camera exposure control
- Auto slide focus – dual cell
- Photocopy machines – the density of the toner
- Colorimetric test Equipment
- Densitometer
- Electronics scales – dual cell
- Automatic gain control – modulated light source
- Automated rearview mirror
Digital Applications:
- Automatic headlight dimmer
- Nightlight control
- Oil burner flame out
- Streetlight control
- Absence/presence (beam breaker)
- Position sensor
Other applications:
- Annunciator
- Camera automatic photometry
- Electronic toy
- Industrial control
- Light control
- Light control lamp
- Photoelectric control
- Switch
- Spectral peak: 560nm
- Maximum voltage: 250 VDC
- Maximum wattage: 200 mW
- Operating temperature: -30˚C ~ 70˚C
- Light resistance (10 Lux): 10-20 KΩ
- Dark resistance: 2 MΩ
- Resistance illumination: 3
- Response time: 20ms (Rise), 30ms (Down)
