Netatmo Forum

The relevant diameter of the rain gauge is about 12.5 cm which corresponds to an area of 122.72 cm2. 200 mL equals 200 cm3. This volume per area yields 200 cm3 / 122.72 cm2 = 1.63 cm, which is 16.3 mm.

You don't have to count the tips. If you pour in 200 mL of water the reading in the web interface must be 16.3 mm/h. Adjust the calibration value accordingly if your reading differs.

I calibrated mine the following way: I poured 200 mL water in and then adjusted the calibration factor in the web menu until the reading in the web interface showed 16,3.

I today determined a calibration factor of 1.65 for my station.