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1/8 Inch Water Flow Sensor YF-S401

1/8 Inch Water Flow Sensor YF-S401

β‚Ή206.00Price
πŸ“Œ Overview
The YF-S401 Water Flow Sensor is a compact sensor used to measure water flow rate in small pipes.
πŸ‘‰ Ideal for:
  • 🚰 Water dispensing systems
  • 🌱 Irrigation systems
  • πŸ€– Arduino & IoT projects
  • β˜• Coffee machines & appliances
🧠 Working Principle
  • Inside β†’ rotating turbine (rotor) + Hall Effect sensor
  • Water flows β†’ rotor spins
  • Speed of rotation ∝ flow rate
  • Sensor outputs pulse signals
πŸ‘‰ Based on Hall Effect
βœ” More flow β†’ more pulses
πŸ“Š Infographic Summary
β”Œβ”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”
β”‚ πŸ’§ YF-S401 FLOW SENSOR β”‚
β”œβ”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€
β”‚ 🎯 Measures: Water flow β”‚
β”‚ πŸ“ Range: 0.3–6 L/min β”‚
β”‚ ⚑ Voltage: 5V–24V β”‚
β”‚ πŸ”Œ Output: Pulse signal β”‚
β”‚ πŸ“¦ Size: 1/8 inch β”‚
β”‚ 🧠 Tech: Hall Effect β”‚
β””β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”˜
πŸ”Œ Pin Configuration
β”Œβ”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”
β”‚ YF-S401 Sensor β”‚
β”œβ”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€
β”‚ Red β†’ VCC (5–24V)
β”‚ Black β†’ GND
│ Yellow→ Signal
β””β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”˜
βš™οΈ Key Specifications
  • ⚑ Operating Voltage: 5V – 24V DC
  • πŸ“ Flow Range: 0.3 – 6 L/min
  • πŸ”Œ Output: Digital pulse signal
  • 🎯 Accuracy: Β±5%
  • πŸ”‹ Current Consumption: ~15 mA
  • 🌑 Max Liquid Temp: up to 120Β°C
  • πŸ’§ Pressure: up to ~0.8–2 MPa
πŸ”„ Pulse Output Formula
πŸ‘‰ Typical relation:
  • 1 Liter β‰ˆ 5880 pulses
So,
  • Flow rate = pulses per second Γ· calibration factor
🌟 Key Features
  • πŸ’§ Compact 1/8" pipe size
  • ⚑ Low power consumption
  • πŸ”§ Easy to interface
  • πŸ“Š Pulse output (easy to count)
  • πŸ“¦ Waterproof internal design
πŸ§ͺ Applications
  • 🚰 Water flow monitoring
  • 🌱 Smart irrigation systems
  • β˜• Coffee/tea machines
  • πŸ§ͺ Liquid dispensing systems
  • πŸ€– IoT water management
  • 🏭 Cooling systems (CNC/laser)
πŸ”— Interfacing
Compatible with:
  • πŸ”΅ Arduino
  • πŸ“‘ ESP32 / ESP8266
  • πŸ“ Raspberry Pi
πŸ‘‰ Connect signal β†’ digital pin (interrupt recommended)
πŸ”„ Working Example
πŸ‘‰ Water Monitoring System:
  • Water flows through sensor
  • Rotor spins
  • Pulses generated
  • Microcontroller counts pulses
  • Displays flow rate or total volume
⚠️ Important Notes
  • ⚠️ Must be installed vertically for accuracy
  • ⚠️ Avoid air bubbles (affects readings)
  • ⚠️ Not suitable for dirty/corrosive liquids
  • ⚠️ Needs calibration for precise measurement
πŸ†š YF-S401 vs YF-S201
FeatureYF-S401YF-S201
Pipe Size1/8 inch1/2 inch
Flow Range0.3–6 L/min1–30 L/min
Use CaseSmall systemsMedium systems
πŸ’‘ Pro Tip
  • Use interrupt pin for accurate pulse counting
  • Add filter or debounce logic in code
πŸ‘‰ Perfect for low-flow precision measurement projects
Quantity
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