Rain gauges and rain sensors

The rain gauges and rain sensors These are meteorological instruments used to measure the atmospheric precipitation and record the amount of rainfall over a specific time interval. These devices are essential in automatic weather stations, precision agriculture, hydrological monitoring, and climate studies.

Precipitation is normally expressed in millimeters (mm), a unit equivalent to liters per square meter (l/m²). The rain gauge collects rainwater using a funnel of known area and directs it towards a calibrated measuring system, allowing for the precise determination of accumulated precipitation.

Rainfall measurement technologies

• Tilting bucket rain gauges: The most widely used technology in automatic weather stations. Each tilt of the bucket generates an electrical pulse through a reed switch, proportional to the amount of recorded precipitation (usually 0.1 mm or 0.2 mm per pulse).
• Hellmann-type manual rain gauges: Reference instruments used in official meteorological observation and climatological studies, characterized by their high precision and standardized design.
• Electronic rain sensors: devices designed to detect the start of precipitation and activate automatic control or monitoring systems.

Applications of rain gauges and precipitation sensors

• Automatic weather stations and climate monitoring networks.
• Irrigation management and precision agriculture.
• Hydrological monitoring and basin studies.
• Early warning systems for weather events.
• Integration into dataloggers and data acquisition systems.

The equipment included in this category is designed for outdoor use and manufactured with materials resistant to weathering and UV radiation, guaranteeing reliable precipitation measurements even in demanding environmental conditions.