1 Inch Water Flow Sensor YF-G1 DN25

💧 1 Inch Water Flow Sensor (YF-G1 DN25)
High Flow Measurement • Hall Effect • Industrial Use
📌 What is YF-G1 DN25?
The YF-G1 DN25 is a large water flow sensor designed to measure flow rate of liquids (mainly water) in pipelines.
👉 “DN25 / 1 inch” refers to pipe size compatibility
👉 Suitable for medium to high flow applications
✔ Commonly used in:
Water systems
Industrial pipelines
Automation projects
⚙️ Working Principle
Based on Hall Effect sensing
Inside the sensor:
A rotor (impeller) spins when water flows
A magnetic element rotates with it
Hall sensor detects rotation and generates pulses
Process:
Water flows through sensor
Rotor spins
Speed ∝ flow rate
Pulses generated → sent to controller
✔ Flow rate is calculated from pulse frequency
🔌 Pin Configuration
Typical 3 wires:
Red → VCC (5V–18V)
Black → GND
Yellow → Pulse Output
✔ Output is a digital pulse signal
🔄 Output Behavior
Output = Pulse signal (frequency)
Flow rate relation:
👉 F = k × Q
F = Frequency (Hz)
Q = Flow rate (L/min)
✔ Example:
Approx formula: F ≈ 4.8 × Q
📊 Technical Specifications
Pipe Size: 1 inch (DN25)
Operating Voltage: 5V – 18V DC
Current Consumption: ≤15 mA
Flow Range: 2 – 100 L/min
Accuracy: ±3%
Working Temperature: -20°C to +85°C
Max Pressure: ≥2 MPa
Output Type: Digital pulse
Material: Plastic body with internal rotor
Plastic valve body
Water rotor (impeller)
Magnetic rotor
Hall-effect sensor
✔ Converts mechanical flow → electrical pulses
✨ Key Features
Supports high flow rates
Non-contact electronic sensing
Good sealing and durability
Easy installation (inline pipe fitting)
High sensitivity and stable output
🛠️ Applications
Water flow measurement systems
Smart water meters
Industrial automation
Water vending machines
Irrigation systems
Liquid dispensing machines
⚡ Advantages
Simple and reliable design
Accurate for medium/high flow
Easy interfacing with Arduino/ESP32
Low power consumption
⚠️ Limitations
Works only with liquids (mainly clean water)
Accuracy reduces at very low flow
Needs calibration for precise measurement
Sensitive to debris (needs filter)
💡 Important Notes
Install in correct flow direction (arrow marked)
Use filter for dirty water
Always mount in-line with pipe
Do not exceed pressure or temperature limits
🧾 Summary
The YF-G1 DN25 Water Flow Sensor is a:
✔ Hall-effect based flow meter
✔ Designed for 1-inch pipelines
✔ Provides pulse output proportional to flow
👉 Ideal for:
Water monitoring systems
Industrial flow measurement
IoT-based smart metering
🧠 Internal Components