Rain Gauge

Resources:

• Mechanical Drawing

SparkFun Rain Gauge: Self-Emptying Bucket Sensor for Accurate Rainfall Measurement

The SparkFun Rain Gauge is a self-emptying bucket-type sensor designed for accurate and reliable rainfall measurement. Each time 0.011 (0.2794 mm) of rain is collected, the internal tipping mechanism activates a momentary switch closure, which can be easily detected by a microcontroller interrupt pin or a digital counter.

The gauge is equipped with an RJ11 connector, where the center conductors are wired directly to the switch, making integration with data loggers, weather stations, or custom environmental monitoring systems straightforward. Its automatic emptying design ensures continuous operation without manual intervention, making it a perfect choice for weather monitoring, IoT environmental sensing, and educational projects.

Key Features:

• Self-Emptying Mechanism: Continuously collects and empties rainwater for uninterrupted measurements.
• High Accuracy: Provides one switch closure for every 0.011 (0.2794 mm) of rainfall.
• Easy Integration: Works with microcontrollers via interrupt pins or digital counters.
• RJ11 Connector: Simple and secure connection; center pins linked to the switch.
• Low Maintenance: Automatic emptying reduces the need for manual reset.
• Applications: Ideal for weather stations, IoT environmental sensors, data logging, and educational setups.