High Capacity 280 mm Professional Rain Gauge PluviometerPRECISE MEASUREMENT- This rain gauge’s outdoor funnel collects rain and directly sends to the inner measuring tube, rainfall exceeding inner tube capacity flows into the outer cylinder. Inner measuring tube has a capacity of 1.00 inch and is graduated in one hundredth of an inch increment. Because of the clear plastic structure, the rain gauge is very easy to read. Measures a full 280 mm of total precipitation.