Liquid Flow Meter

Simple liquid flow meter - on output You get impulses from Hall Effect sensor (450 per one liter). This is very rough reading with over 10% of error.

Wires on connector: red (5-18VDC power), black (ground) and yellow (Hall effect pulse output). 1/2" nominal pipe connections, 1/2" of thread

Specification:

• Working Voltage: 5 to 18VDC
• Max current draw: 15mA @ 5V
• Working Flow Rate: 1 to 30 Liters/Minute
• Working Temperature range: -25 to 80°C
• Working Humidity Range: 35%-80% RH
• Maximum water pressure: 2.0 MPa
• Output duty cycle: 50% +-10%
• Output rise time: 0.04us
• Output fall time: 0.18us
• Pulses per Liter: 450

Product page on Adafruit. Arduino sketch with example for this meter.