LED
LCD
YF-S201 Water Flow Sensor | 1-30L/min
Product Overview
The YF-S201 Water Flow Sensor from Pro Tronix consists of a high-quality plastic valve body, a water rotor, and a Hall-effect sensor. When water flows through the rotor, it rolls and triggers the Hall sensor, which outputs a pulse signal for every revolution. This frequency is proportional to the velocity of the liquid.
Its standard 1/2″ (DN15) threaded connections make it incredibly easy to install into standard plumbing pipes or garden hose systems. Because it outputs a simple digital pulse, it is widely favored by the maker community for projects requiring precise liquid tracking, leak detection, or batch control.
Technical Specifications
| Feature | Specification |
| Model | YF-S201 |
| Operating Voltage | 5V – 18V DC |
| Flow Rate Range | 1 to 30 Liters/Minute |
| Interface Thread | 1/2″ (approx. 20mm) |
| Output Signal | Digital Pulse (NPN) |
| Flow Pulse Characteristic | $F = (7.5 \times Q)$ where Q is L/min |
| Max Water Pressure | 1.75 MPa |
| Operating Temperature | Up to 80°C |
| Cable Length | ~15cm |
| Supplier | Pro Tronix |
Key Features
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Hall Effect Technology: Provides a reliable digital signal without physical contact between the sensor and the water, ensuring a long operational life.
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Wide Voltage Range: Works perfectly with both 5V (Arduino) and 12V industrial systems.
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Low Power Consumption: Minimal current draw makes it suitable for battery-powered remote monitoring stations.
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High Pressure Resistance: Rated for up to 1.75 MPa, making it safe for use with standard household water pressure.
Common Applications
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Smart Water Meters: Tracking daily water consumption for home automation or billing systems.
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Automatic Liquid Dispensers: Measuring the exact amount of liquid poured for beverage machines.
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Leak Detection Systems: Monitoring flow to identify abnormal usage and trigger an emergency shut-off valve.
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Hydroponics & Irrigation: Ensuring that plants receive the precise volume of water or nutrient solution required.
You can see the rest of our available air & fluid pumps from here: Air & Fluid Control | Pro Tronix
