GL20528 Photoresistor Sensor LDR 5-10KΩ 20mm
The GL20528 Photoresistor Sensor LDR 5-10KΩ 20mm is a 20mm diameter light-sensitive photoresistor (LDR) made of semiconductor material whose resistance decreases with increasing light intensity. It features a large sensing area for improved sensitivity, epoxy coating for durability, and a spectral peak around 560 nm that aligns with human eye sensitivity. It operates at a maximum voltage of 500VDC and power rating of 100 mW, with a light resistance typically in the 5–10kΩ range under bright light and around 1MΩ in darkness. It has a fast response time of about 30 milliseconds and is widely used in applications like camera exposure control, automatic lighting, flame detection, photocopy machines, and streetlight controls. Its good reliability, high sensitivity, and compact size make it suitable for various light detection and control systems in both industrial and consumer electronics.
Features
- Coated with epoxy for durability and protection
- Good reliability in various environmental conditions
- High sensitivity to light changes
- Compact and small volume design
- Fast response time (approximately 30 milliseconds for increase and decrease)
- Excellent spectral characteristics with a peak sensitivity near 560 nm (green light)
- Maximum operating voltage of 500 VDC
- Maximum power rating of 100 mW
- Typical light resistance range of 5 to 10 kΩ under bright light
- Dark resistance around 1MΩ
- Easy to use with PCB through-hole mounting and two-pin design
Dimensions
Specifications
| Parameters | Value/Range |
| Diameter | 20 mm |
| Material | Cadmium Sulfide (CdS) |
| Resistance (Dark) | 1MΩ |
| Resistance (Bright Light) | 5KΩ – 10KΩ |
| Sensitivity | High |
| Response time | Increase: 30msec
Decrease: 30msec |
| Operating Temperature | -30°C to +70°C |
| Maximum Voltage | 500V |
| Power Rating | 100 mW |
| Spectral Peak Response | 560 nanometer |
| Gamma value at 100- 10Lux | 0.6 |
Applications
- Automatic gain control with modulated light source.
- Automated rear-view mirrors.
- Automatic headlight dimmers.
- Nightlight control.
- Oil burner flame out detection.
- Streetlight control systems.
- Absence/presence detection (beam breaker).
- Position sensors.
- Annunciators.
- Camera automatic photometry.
- Electronic toys.
- Industrial control systems.
- Light control lamps.
- Photoelectric control switches.
Package Contents
- 1 x GL20528 Photoresistor Sensor LDR 5-10KΩ 20mm
Reviews
There are no reviews yet.