Overview

This device is designed to measure rainfall; However, we are currently using a number of these as flow meters capable of measuring very low flow rates.

NovalLynx 260-2501-a Rain Gauge Tipping Bucket (Manufacturers webpage)

Calculation Notes

Output 1:	Pulses (unit count)		Range 1:	0 to 60 (per minute)
Output 2:			Range 2:	0 to ?

The rain gauge is designed to measure inches of rain at 0.01” per tip. When used as a flow meter, each tip corresponds to a specific volume of water. With an 8” input area this equates to 0.5024 cu. in. or 0.008237 liters of water.

k (rainfall) = 0.01”/tip,  k (volume) = 0.008237 liters/tip

The calibration parameter, k, is determined empirically.

Wiring Diagram