Rain gauges are classified as either non-recording or recording. A rain gauge is a type of instrument used by meteorologists and hydrologists to calculate the rate of rainfall over a specific time span.
The non-recording type of rain gauges only collects the rain and do not measure or record the rainfall simultaneously. Non-recording rain gauges only display the amount of rain that has fallen. This type of rain gauge cannot tell you when the rain started, when it stopped, what the intensity of the rain was, or how much the intensity of the rain varied over the course of the storm.
Example of non-recording rain gauges – Symons Rain Gauge