Mini Water Flow Sensor (White)

💧 Mini Water Flow Sensor (White)
🧩 Overview
Compact inline water flow measurement sensor
Common model: YF-S201 (mini type)
Measures flow rate and total water volume
Compatible with Arduino, ESP32, Raspberry Pi
⚙️ Working Principle
Water flows through a turbine (rotor) inside the sensor
Rotor spins based on flow rate
Hall-effect sensor detects rotation
Generates pulse signals
Microcontroller counts pulses → calculates flow rate & volume
📊 Key Specifications
🔹 Operating Voltage: 4.5V – 18V DC
🔹 Current Consumption: ~15 mA
🔹 Flow Range: 1 – 30 L/min
🔹 Output Type: Digital pulse (TTL)
🔹 Pulse Rate: ~450 pulses per liter
🔹 Accuracy: ±10%
🔹 Max Pressure: ≤ 1.75–2.0 MPa
🔹 Temperature Range: -25°C to 80°C
🧱 Module Components
Plastic (PVC/nylon) body
Internal turbine rotor with magnet
Hall-effect sensor
3-wire cable:
🔴 Red → VCC
⚫ Black → GND
🟡 Yellow → Signal output
🔄 Features
Small and lightweight design
Easy inline pipe installation
High sealing → leak-resistant
Stable pulse output for digital systems
Low power consumption
🛠️ Applications
Water dispensers 💧
Smart water meters
DIY flow monitoring projects
Irrigation systems 🌱
Liquid dispensing machines
⚠️ Usage Tips
Install according to flow direction arrow
Avoid air bubbles and debris
Use clean water for longer life
Keep sensor horizontal or vertical (slight tilt allowed)
Calibrate for better accuracy
✅ Advantages
Low cost and widely available
Easy interface with microcontrollers
Compact size (mini design)
Reliable for general-purpose flow measurement
⚠️ Limitations
Moderate accuracy (±10%)
Not suitable for very low flow detection
Sensitive to turbulence and impurities
Needs calibration for precise measurements
🔍 Summary
A mini, low-cost water flow sensor
Uses Hall-effect + turbine mechanism
Outputs pulse signals for flow calculation
Best for DIY, IoT, and small water systems