YF-S401 Water Flow Sensor (0.3-6L/min) for Coffee Makers & Arduino
YF-S401 Water Flow Sensor (0.3-6L/min) for Coffee Makers & Arduino
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Short Product Description
Short Product Description
Need precise water flow measurement for your next DIY project or appliance repair? The YF-S401 Water Flow Sensor delivers highly accurate, real-time flow tracking from 0.3 to 6 liters per minute. Perfect for coffee makers, water dispensers, and Arduino electronics, this compact sensor uses a reliable Hall effect mechanism to ensure longevity and precision. With a robust design capable of handling up to 1.75Mpa of water pressure, it is the ideal choice for both commercial equipment repairs and custom automated fluid systems. Sourced by Sun Cheong Computer Co. Ltd., guaranteed for quality.
Key Features
Key Features
- Wide Operating Voltage (DC 4.5V-24V): Ensures easy integration with most logic boards and microcontrollers without requiring complex voltage regulators.
- High-Precision Flow Range (0.3-6L/min): Allows for exact fluid measurement, preventing over-pouring and ensuring precise dosing for beverage machines.
- Durable Hall Effect Technology: Provides long-lasting reliability without mechanical contact wear, keeping your automated systems running smoothly for years.
- High-Pressure Tolerance (Up to 1.75Mpa): Prevents leaks and blowouts even in pressurized plumbing or water heater systems, guaranteeing operational safety.
- Compact 1/4" External Threads: Makes plumbing installation quick and seamless, even in the tightest appliance enclosures.
Full Product Description
Full Product Description
Precision Fluid Measurement You Can Trust
In the world of automated fluid control, precision is everything. Whether you are repairing a high-end commercial coffee machine, designing a smart water dispenser, or building an automated irrigation system for a STEM project, the YF-S401 Water Flow Sensor provides the exact data you need. Built with a high-quality magnetic rotor and a Hall effect sensor, this device translates water movement into a readable electrical pulse, allowing your microcontroller to track fluid volume with exceptional accuracy.
How the YF-S401 Solves Your Flow Control Problems
Mechanical flow meters often suffer from wear and tear, leading to inaccurate readings and frequent replacements. The YF-S401 bypasses this issue entirely. By utilizing a Hall effect sensor that is sealed completely away from the water pipe, it ensures that the internal electronics stay dry and safe. This translates to a longer lifespan and zero signal degradation over time.
Furthermore, integration is incredibly straightforward. With a standard three-wire output (Red for Power, Black for Ground, and Yellow for Signal), it connects seamlessly to popular microcontrollers like Arduino and Raspberry Pi. You don't need complex adapters or proprietary boards to get started. Just hook it up, apply the basic frequency calculation formula, and you have a professional-grade flow measurement system ready to go.
Technical Specifications
Technical Specifications
- Model: YF-S401
- Flow Range: 0.3 - 6 L/min
- Working Voltage: DC 4.5V - 24V (Rated at DC 5-18V)
- Max Operating Current: 15 mA (DC 5V)
- Load Capacity: ≤ 10 mA (DC 5V)
- Max Water Pressure: ≤ 1.75 MPa
- Operating Temperature: -25°C to +80°C
- Operating Humidity: 35% - 90% RH (No frost)
- Inlet/Outlet Size: Approx. Outer Ø7mm / Inner Ø4mm (1/4" Thread)
- Wire Length: Approx. 14cm
- Wiring Output: Red (IN/VCC), Yellow (OUT/Signal), Black (GND)
Delivery Options
Delivery Options
- Local delivery within Hong Kong and in-store pickup.
- Free shipping for orders of HK$400 or above; HK$35 shipping fee for orders below HK$400.
- Shipped by SF Express, usually dispatched the same day for orders confirmed before 6:00 PM (Mon–Sat).
- Estimated delivery time: 1–3 business days after dispatch (Hong Kong).
- In-store pickup details (location and time) will be confirmed by email or phone message.
- Delivery times are estimates and may be affected by weather or unforeseen circumstances.
FAQ Section
FAQ Section
Q: How do I connect the YF-S401 sensor to an Arduino board?
A: Connecting is simple. Wire the Red line to your Arduino's 5V pin, the Black line to GND, and the Yellow signal line to a digital input pin (preferably one that supports interrupts, like Pin 2 or 3).
Q: Is this sensor suitable for hot water systems?
A: Yes, the YF-S401 is built with temperature-resistant materials and can safely handle fluid temperatures up to 80°C, making it suitable for water heaters and coffee machines.
Q: How do I calculate the flow rate from the sensor's signal?
A: The sensor outputs a square wave pulse. You calculate the flow rate using the formula: Frequency (Hz) = Constant * Flow Rate (L/min). You count the pulses over a second in your code to determine the exact volume.
Target Users / Applications
Target Users / Applications
- DIY Electronics Enthusiasts & STEM Students: Ideal for Arduino/Raspberry Pi projects like smart gardens or automated drink mixers.
- Appliance Repair Technicians: A reliable replacement part for commercial coffee makers, water dispensers, and RO water filters.
- Enterprise / Engineering Procurement: Cost-effective bulk components for manufacturing fluid metering devices.
