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Water Flow Sensor YF-S201

The water flow sensor consists of a plastic valve body, a water rotor, and a hall-effect sensor. When water flows through the rotor, the rotor rolls. Its speed changes with different rates of flow. The hall-effect sensor outputs the corresponding pulse signal. This sensor is suitable for detecting flow in water dispensers or coffee machines. We have a comprehensive line of water flow sensors in different diameters. Check them out to find the one that meets your need most.

Features:

  • Compact, Easy to Install
  • High Sealing Performance
  • High Quality Hall Effect Sensor
  • RoHS Compliant

Specifications:

  • Working Voltage: DC 4.5V–24V
  • Normal Voltage: DC 5V–18V
  • Max. Working Current: 15mA (DC 5V)
  • Load Capacity: ≤ 10 mA (DC 5V)
  • Flow Rate Range: 1–30L/min
  • Load Capacity: ≤ 10mA (DC 5V)
  • Operating Temperature: ≤ 80°C
  • Liquid Temperature: ≤ 120°C
  • Operating Humidity: 35%–90%RH
  • Allowing Pressure: ≤ 1.75MPa
  • Storage Temperature: -25°C – 80°C
  • Storage Humidity: 25%–95%RH
  • Electric Strength: 1250V/min
  • Insulation Resistance: ≥ 100MΩ
  • External Threads: 1/2"
  • Outer Diameter: 20mm
  • Intake Diameter: 9mm
  • Outlet Diameter: 12mm

Application:

  • Water heaters, credit card machines, water vending machines, flow measurement devices!

Circuit:

  • Red: Positive
  • Black: GND
  • Yellow: Output signal

Flow Range: 100L/H–1800L/H

Flow (L/H) Freq (Hz) Error Range
120 16.1 ±10
240 32.5  
360 49.3  
480 65.5  
600 82.0  
720 90.2 ±5
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Exchange or return policy



Every item comes with a 30-day warranty. However, there are certain conditions that apply:

  1. The customer should not be responsible for any self-inflicted damage, such as incorrect power connections (for example, supplying 5V instead of the required 3.3V for a sensor).

  2. The product must be in perfect condition, without any breakage or damage caused by electricity (e.g., short circuits leading to electrical fires).

  3. The store does not accept product exchanges due to customer misunderstandings, such as purchasing the wrong size for their project or buying something without eventually using it. Customers can inquire about the product details and ensure compatibility before making a purchase by contacting us through our Line account @modulemore during business hours. Please note that there may be delays in response between 12:00 PM and 2:00 PM.

Return Policy: To initiate a product return, customers must provide the original receipt or a copy for quick verification. Returns can be sent to our store address by following these guidelines:

  1. Provide a detailed description of the damaged item(s).
  2. Mention any tests or experiments conducted by the customer.

Please note that the store reserves the right to make the final decision regarding product replacement or refund.

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Last updatedSep 5, 2025

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Arduino compatible board, Iot, ESP32, ESP8266, Nodemcu, Raspberry pi, micro:bit and etc.
Mobile number : 0831710868
E-mail : paheyisoicus@gmail.com
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