YF-S201 Arduino Water Flow Sensor Water Measurement Sensor

YF-S201 Arduino Water Flow Sensor Water Measurement Sensor
This sensor contains a rotating paddle to measure the amount of liquid that has passed through the sensor. There is an integrated magnetic effect sensor (Hall effect sensor) that emits an electrical pulse with each rotation. The Hall effect sensor is separated from the medium (e.g. water) and therefore remains durable for a long time. The sensor has three contacts: red (power 5-24 VDC), black (GND / minus) and yellow (Hall effect pulse output). By counting the pulses from the sensor output, you can easily calculate the water flow.
Note that this is not a precision sensor and the pulse frequency will vary slightly depending on the flow rate, fluid pressure and orientation of the sensor. Careful calibration is required. Ideal for basic measurement tasks!
The pulse signal is a simple square wave and therefore quite easy to record and convert to liters per minute.
Technical data:

Model: YF-S201
Sensor type: Hall effect
Operating voltage: 5 to 18V DC
Maximum current consumption: 15mA at 5V
Output type: 5V
Operating flow rate: from 1 to 30 liters / minute
Operating temperature range: -25 to + 80
Accuracy: 10%
Maximum water pressure: 2.0 MPa
Characteristics of the flow pulse: Frequency (Hz) = 7.5 * Flow rate (L / min)
Pulses per liter: 450
Cable height length: approx. 15cm
Connections for 1/2″ thread

Connections:

Red cable: + 5 V
Black cable: GND
Yellow cable: PWM output

Package Content:
1 x YF-S201 Water/flow sensor – 1-30L/min,  G1/2, Hall effect