YF-S201 Water Flow Sensor

  • Working Voltage: 5V–18V DC (minimum tested working voltage 4.5V)
  • Maximum Current Draw: 15mA @ 5V
  • Working Flow Rate: 1–30 L/min
  • Maximum Water Pressure: 2.0 MPa
  • Pulse Output Formula:
    Frequency (Hz) = 7.5 × Flow Rate (L/min)
  • Output Type: Digital pulse output (Hall-effect)
  • Connection Type: 3-wire (VCC, GND, Signal)
Description
  • The YF-S201-0.5 Water Flow Sensor uses a Hall-effect turbine system to measure water flow and outputs a digital pulse stream, enabling easy interfacing with microcontrollers such as Arduino, ESP32, Raspberry Pi, and PLCs.
  • Operates over a wide voltage range (5–18VDC), making it suitable for diverse industrial and hobbyist systems.
  • Constructed using durable plastic, corrosion-resistant materials, and sealed with an O-ring to ensure long service life even in continuous-flow applications.
  • Provides accurate, real-time flow measurement, allowing users to track water consumption, manage flow-based automation, and detect abnormal usage.
  • Simple installation with standard ½-inch pipe threads, ideal for integration in domestic and industrial pipelines.
  • Delivers 450 pulses per liter, enabling precise calculations via software.
  • Commonly used in environments needing monitoring, protection, or automation, such as water control systems, filtration units, and smart homes.

PACKAGE INCLUDES:
  • 1 × YF-S201 Water Flow Meter Sensor (1–30 L/min) – Black
Additional information
Weight75 g
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Applications
  • Irrigation and agriculture systems
  • Aquaculture and aquaponics
  • Water treatment and purification plants
  • Industrial manufacturing lines
  • Smart home water management
  • Cooling and HVAC systems
  • Fire suppression systems
  • Swimming pool monitoring
  • Water distribution measurement
  • Beverage and liquid dispensing systems
TECHNICAL SPECIFICATIONS
Parameter Value
Working Flow Rate 1–30 L/min
Operating Temperature -25°C to +80°C
Operating Humidity 35% – 80% RH
Accuracy ±10%
Pulses per Liter 450
Output Duty Cycle 50% ± 10%
Output Rise Time 0.04 µs
Output Fall Time 0.18 µs
Max Water Pressure 2.0 MPa
Outer Diameter 20 mm
Intake Diameter 11 mm
Outlet Diameter 11 mm
Length 62.5 mm
Width 36 mm
Height 35 mm
Weight 50 g
Shipping Weight 0.089 kg
Shipping Dimensions 9 × 6 × 6 cm