The Water Flow sensor measures the rate of a liquid flowing through it. The YF-S401 water flow sensor consists of a plastic valve body, flow rotor and hall effect sensor. It is usually used at the inlet end to detect the amount of flow. When liquid flows through the sensor, a magnetic rotor will rotate and the rate of rotation will vary with the rate of flow. The hall effect sensor will then output a pulse width signal. Connect it to a microcontroller and you can monitor multiple devices such as your coffee maker, sprinkler or anything else, and control the water flow rate to suit your needs!

Note:
*A 6 mm hose is recommended
*Avoid unit contact with corrosive chemicals
*The unit must be installed vertically, tilted no more than 5 degrees
*Liquid temperature should be less than 120 C to avoid damage to unit

|Specification|

Inner Diameter: 4 mm

Outside diameter: 7 mm

Proof Water Pressure: &;lt;0.8 MPa

Water Flow Range: 0.3-6 L/min

Voltage Range: 5~12 V

Operating Current: 15 mA (DC 5V)

Insulation Resistance: &;gt;100 MΩ

Accuracy: ±5% (0.3-3L/min)

The Output Pulse High Level: &;gt;4.5 VDC (DC input voltage 5 V)

The Output Pulse Low Level: &;lt;0.5 VDC (DC input voltage 5 V)

Output Pulse Duty Ratio: 50% ± 10%

Water-flow Formula: 1L = 5880 square waves

Working Humidity Range: 35% ~ 90% RH (no frost)

Dimension: 58*35*26 mm/2.28*1.37*1.02 inches

Weight: 30g

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Gravity - Water Flow Sensor - 1/8" x1