Liquid flow sensor YF-S201 30l/m - thread 1/2''

Index: SES-08896 EAN: 5904422366933

Sensor of liquid flow operating in the range from 1 to 30 liters per minute. Is supplied with the voltage from 5 V to 24 V, the output signal is a frequency proportional to the measured value.

Liquid flow sensor YF-S201 30l/m - thread 1/2''
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Manufacturer: OEM


A simple sensor for measuring the flow of liquids. Consists of a pinwheel that has a magnet and Hall sensors. By counting the pulses of a hanging fan, in a simple way, you can measure the flow of liquids. With this method, the electronic part of the sensor has no contact with water.


The device has three wires:

  • red - supply voltage from 5 V to 24 V
  • black - ground
  • yellow pulse output signal 


By counting pulses you can track the fluid flow in a simple way. It should be noted that this is not a sensor for precision measurements. However, it is ideal for use in hobbies that do not require greater accuracy than 10 %.


The product is compatible with Arduino 

The manufacturer provides a sample program for Arduino with connection diagram. The project is available in the user's guide.



  • Supply voltage: 5 V to 24 V
  • Power consumption for 5 V: 15 mA
  • Measuring range: from 1 to 30 l/min
  • Operating temperature: to 80 °C
  • Permissible humidity: 35 % - 90% RH
  • Permissible water pressure: 1.75 MPa
  • Mounting on a pipe with a diameter of 1/2"
  • Material: plastic
  • Dimensions: 63 x 33 x 35 mm

Test 3
Package width 8 cm
Package height 9.6 cm
Package depth 3.6 cm
Package weight 0.052 kg



Question: What is the length of the cable in the YF-S 201 30l/m sensor
Answer: The total length of the cable including the plug is about 157 mm

Product reviews

Liquid flow sensor YF-S201 30l/m - thread 1/2''


Average grade


Customers opinion
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Natalia S. 11.07.2022 Confirmed purchase Translated review
Everything as described
Mirosław M. 29.03.2022 Confirmed purchase Translated review
Solid workmanship
Dariusz D. 01.11.2021 Confirmed purchase Translated review
Very good service
Wojciech I. 11.06.2021 Confirmed purchase Translated review
Good for teaching positions
Jakub 16.04.2024 Confirmed purchase
Leszek 27.11.2023 Confirmed purchase

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