A Sunshine Recorder is a meteorological instrument used to measure the duration of bright sunshine over a specific period, typically daily or monthly. It works by focusing sunlight through a glass sphere onto a specially designed recording card. As the sun moves across the sky, the focused rays burn a trace on the card, indicating the total hours of sunshine received at that location. Designed for accuracy and durability, the sunshine recorder is widely used in weather stations, climate research centers, agriculture, solar energy studies, and environmental monitoring. Its simple, robust construction allows it to operate reliably in various climatic conditions without requiring electricity or complex maintenance. By providing essential data on solar exposure, the instrument helps in analyzing climate patterns, agricultural planning, and renewable energy assessments.
| Measurement | Bright Sunshine Hours |
| Recorder Type | Campbell–Stokes |
| Recording Medium | Sunshine Card |
| Sphere Material | Solid Glass |
| Sphere Diameter | Standard |
| Recording Range | 0–24 Hours |
| Accuracy | ±0.1 Hr |
| Mounting | Pedestal |
| Orientation | True North |
| Housing Material | Metal |
| Weather Resistance | High |
| Maintenance | Periodic |
| Operating Temperature | Outdoor |
| Calibration | Manual |
| Card Type | Seasonal |
| Application | Meteorology |
| Durability | High |
| Portability | Fixed |
| Country Of Origin | India |
| Manufacturer | Lakshmi Engineering Works |