Campbell-Stokes Sunshine Recorder

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Campbell-Stokes Sunshine Recorder is a precision meteorological instrument used for measuring the duration of bright sunshine with high reliability and accuracy. The instrument operates by concentrating solar radiation through a solid glass sphere onto a calibrated sunshine recording card, creating a visible burn trace that represents the daily sunshine hours. Because of its robust design, simple operating principle, and proven field performance, it is widely used in weather stations, agricultural research centres, environmental monitoring projects, climatology studies, and meteorological departments. The Campbell-Stokes pattern remains one of the most trusted methods for sunshine duration measurement across the world.

Category : Solar Monitoring
Model Number : BHM-M-SSR
Brand : Balaji Hydromet

Campbell-Stokes Sunshine Recorder

Campbell-Stokes Sunshine Recorder is a standard meteorological instrument used for measuring the duration of bright sunshine at a particular location. It works on a simple and reliable principle in which a solid glass sphere focuses the sun’s rays onto a specially designed sunshine recording card. When bright sunshine is present, the focused solar heat produces a burn trace on the card, and the length of this trace indicates the total duration of sunshine during the day. This instrument is widely used in meteorological observatories, agricultural research stations, weather monitoring centres, environmental studies, and climatological applications. The Campbell-Stokes Sunshine Recorder is preferred worldwide because of its simple construction, dependable performance, and accurate sunshine recording method. Different patterns of this recorder are available for tropical, temperate, and polar regions depending on latitude. In India, the Tropical Pattern Campbell-Stokes Sunshine Recorder is commonly used for routine sunshine measurement in accordance with standard meteorological practice. A shorter product-page version: Campbell-Stokes Sunshine Recorder is a precision meteorological instrument used to measure bright sunshine duration. It works by focusing the sun’s rays through a solid glass sphere onto a specially designed recording card, producing a burn trace that indicates the total hours of bright sunshine. It is widely used in weather stations, meteorological observatories, agricultural institutions, and climate research applications.

Technical Data

Latitude	0° S to 40° N or 0° N to 40° S
Dimension	24 x 19 x 17 CM
Sphere Dia	100 ± 3 mm
Changing Card	Daily
Period of recording	18 hours
D Light	74.9 ± 0.25 mm
Spherical segment	Material - Gunmetal or equivalent durability, (a) Central noon line engraved transversely across inner surface (b) Adjustment for inclination of segment to horizontal according to latitude (c) Double base with provision for levelling and azimuth setting (d) Grooves - three pairs to support the summer card, winter card and equinox card