Nunes Instruments

The Self-Recording Rain Gauge is an advanced meteorological instrument designed to automatically measure and record the amount and intensity of rainfall over specified time intervals, such as daily or weekly cycles.

Constructed from durable mild steel or copper, the device features a funnel-shaped collector that directs rainwater into a float chamber. As the water level rises, the float mechanism—equipped with a pen—moves proportionally and traces a line on a rotating chart drum, which is driven by a mechanical or electronic clock. The recorded chart provides a continuous and accurate record of rainfall versus time.

With an accuracy of 0.1 mm and a measuring range up to 300 mm, the instrument is suitable for professional meteorological observations, hydrological research, and environmental monitoring.

• Automatic recording of rainfall amount and intensity

• Float-and-pen mechanism for precise graphical representation

• Mechanical or electronic clock rotates chart drum at a fixed rate (daily/weekly)

• High accuracy (0.1 mm) and wide measurement range (up to 300 mm)

• Durable construction in mild steel or copper for long-term field use

• Easy chart replacement and maintenance-friendly design

• Permanent visual record of rainfall for data analysis

• Suitable for continuous outdoor installation

• Meteorological stations and weather observatories

• Hydrology and environmental research

• Agriculture and irrigation studies

• Water resource management and watershed monitoring

• Rainfall pattern analysis for civil and environmental engineering projects