Water Flow Sensor (YF-S402C)

G3/8 Water Flow Sensor (S402C) – 3/8" Thread Flow Meter for Water Dispenser.

Product Description:
S402C G3/8 Water Flow Sensor – 3/8" Thread Flow Meter for Water Dispenser

Model: YF-S402C
Thread size: G3/8 external thread (3/8 inch)
Flow range: 0.3–10 L/min
Operating voltage: 5–18V DC
Output signal: Pulse signal (Hall effect sensor)
Working pressure: ≤0.8 MPa
Temperature range: 0–80°C
Application: Water dispensers, coffee machines, water vending machines, smart water systems. 

Working principle:

Water flowing through the sensor rotates an internal magnetic rotor, and the Hall sensor converts the rotation into pulse signals. The pulse frequency is proportional to the flow rate, allowing microcontrollers (Arduino, ESP32, etc.) to measure water usage.