Water Flow Sensor YF-S402B 5-24V Flowmeter 0.3-6L/Min


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SKU: 1031153
  1. Flow Range:0.3 to 6L
  2. Input/Output Diameter: 6.5mm
  3. Minimum rated working voltage: DC 5~24V
  4. Max. working current: 15mA (DC 5V)
  5. Working voltage range: DC 5~24V
  6. Load capability: <= 10mA (DC 5V)


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Brand: sea
Category: Water TDS, pH, Flow, Level and Pressure Sensor
Tags: Water Flow Sensor

This is a Water Flow Sensor YF-S402B 5-24V Flowmeter 0.3-6L/Min. The  1/4 inch water flow sensor is basically a small turbine whose output signal is a series of digital pulses. The frequency of the pulses is proportional to the flow rate of the liquid passing through the sensor. That digital signal, whose frequency is in the range between 0Hz and 100Hz, can be read directly through one of the digital input/output pins of a microcontroller.

Suitable for water heater, POS terminal, Automatic water dispenser, Water Purifier, etc.


  1. Lightweight, Small in size, Easy to install;
  2. With stainless steel axis in the wheel, abrasion-resistant
  3. Sealing ring design to prevent water leaks;
  4. Compliant with RoHS standard
  5. Wide range of applications.

Package Includes:

1 x Water Flow Sensor YF-S402B 5-24V Flowmeter 0.3-6L/Min



working voltage


working current(mA)


Load capability

<= 10mA

Input/Output Diameter


Water pressure


Storage Temparature(°C)

-25 ~ 80°C

Storage Humidity

25 to 95% RH

Operating Temperature (°C)

0 to 80

Length (mm):


Width (mm):


Height (mm):


Weight (g):


Shipping Weight 0.04 kg
Shipping Dimensions 11 × 6 × 1 cm
15 Days Warranty

This item is covered with a standard warranty of 15 days from the time of delivery against manufacturing defects only. This warranty is given for the benefit of Robu customers from any kind of manufacturing defects. Replacement will be done against manufacturing defects.

What voids warranty:

If the product is subject to misuse, tampering, static discharge, accident, water or fire damage, use of chemicals & soldered or altered in any way.

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Questions and answers of the customers

    What is value of the sensor's calibration factor? ... Read more
  1. 0 votes
    Q What is value of the sensor's calibration factor? Like some sensor are having 7.5 or 6.5 etc. answer now
    Asked by er.deepghorela on November 24, 2023 4:15 pm
    A Go through the datasheet of the product available ... Read more
  2. Could you please share us the Spec data sheet we h... Read more
  3. 1 vote
    Q Could you please share us the Spec data sheet we have already got one sample for testing. answer now
    Asked by vinusuvarna24 on September 25, 2023 10:04 am
    A Datasheet is provided in attachments you can go th... Read more
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Country Of Origin: China