Flowmeter FS-300A 3/4" 1-60l/min 5-24V for Arduino

Product detailed description

The water flow meter 1-30L/min allows to measure the amount of flowing liquid with the help of a Hall probe. At the outlet, the frequency changes depending on the flow rate, the higher the flow rate, the higher the frequency. Can be used up to a maximum liquid temperature of 80 °C.


Technical parameters:

- thread: G 3/4"
- measured flow rate: 1 ~ 60 l/min
- max. working pressure: 1.75MPa
- output: 5V TTL
- max. working temperature: up to 80°C
- operating humidity: 35%~90% RH (no frost)
- power supply: 3.5-24VDC
- max. power consumption: 15mA
- pulse characteristic: 450 pulses/litre or f (Hz) = 7.5* flow rate (l/min)
- measurement accuracy: 2%
- cable length: ~15cm
- dimensions: 65×40mm
- wiring: red: +5V, black: GND, yellow: OUT (output to digital pin of arduino)


The product is not a separately functional unit, it requires professional assembly.

Packing: 1pc