YF-S201 Water Flow Sensor
YF-S201 Water Flow Sensor - Image 2
YF-S201 Water Flow Sensor - Image 3

YF-S201 Water Flow Sensor

₹250.00

Overview

The YF-S201 is a widely used Hall-effect water flow sensor designed to measure liquid flow rate and volume in fluidics systems. It features a durable plastic body containing a water rotor (pinwheel) equipped with a magnetic element, alongside an integrated Hall-effect sensor module. When liquid flows through the sensor body, it forces the rotor to spin. As the internal magnets rotate past the Hall-effect sensor, magnetic pulses are generated. The output pulse frequency is directly proportional to the velocity and volume of the liquid passing through, allowing microcontrollers such as Arduino, ESP32, or Raspberry Pi to accurately measure flow rate and total volume.

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Description

Key Specifications

Parameter / Feature Specification / Value
Model YF-S201
Sensor Type Hall-Effect (Pulse Output)
Flow Rate Measurement Range 1 – 30 L/min
Maximum Water Pressure ≤ 1.75 MPa (17.5 bar / ~253 PSI)
Operating Voltage Range DC 5V – 18V (typically 5V for microcontrollers)
Maximum Current Draw 15 mA (at 5V DC)
Output Signal Type Digital Pulse (5V TTL Square Wave)
Flow Rate Formula / Pulse Factor F = (7.5 × Q) ± 3%, where F is frequency (Hz) and Q is flow rate (L/min)
Pulse Count per Liter Approx. 450 pulses/liter
Operating Temperature ≤ 80°C
Operating Humidity Range 35% – 90% RH
Thread Size 1/2″ NPT / BSP Male Threaded Ports
Wiring Harness 3-Wire Cable (PVC jacketed)

 

Pinout & Wiring Connections

Wire Color Function Connection Description
Red Wire VCC / Power Supply Connect to 5V–18V DC power source
Black Wire GND / Ground Connect to Common Ground (0V)
Yellow Wire Signal / Output Pulse Connect to Microcontroller Interrupt Pin (Digital Input)

 

Applications & Uses

  • Smart Water Meters & Usage Monitoring: Tracking household or industrial water consumption in real-time, helping to detect leaks or wasteful usage.
  • Water Vending & Dispensing Machines: Controlling exact liquid dispense quantities for automated water dispensers, beverage machines, or coffee makers.
  • Automated Irrigation Systems: Monitoring water flow rate to crops or gardens to ensure optimal watering schedules and prevent over-irrigation.
  • Water Heaters & Boilers: Detecting water flow before engaging heating elements to prevent dry heating and equipment damage.
  • Water Purification & Filtration Units: Measuring volume throughput to determine filter replacement intervals based on total gallons filtered.
  • Liquid Flow Control & Automation Projects: Ideal for DIY robotics, microcontroller experiments (Arduino, Raspberry Pi, ESP8266/ESP32), and IoT liquid management systems.

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YF-S201 Water Flow Sensor

₹250.00