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In stock

SKU: WPSE470 Check our full Whadda product transition list Category:
Free shipping
Free shipping from €50
EU shipping
EU shipping in 1 to 5 days
Belgian shop
Belgian shop
Return policy
14-day unmodified return policy


Use this sensor to measure the approximate flow of water in water heaters, water vending machines, and more!

When water flows through this sensor, it will output a number of pulses. The pulse signal is a square wave, so by counting the pulses, you can easily calculate the water flow in liters per hour. Each pulse is approximately 3,33 milliliters.A lead of 30 cm is also included.


  • Accurate water flow measurement: This sensor provides precise measurements of the volume flow rate of water, which is essential for applications such as boilers and water dispensers. The measuring range of 1-30 liters per minute makes it suitable for various needs.
  • Compatible with Arduino: An example sketch is available for Arduino users, simplifying the integration and use of this sensor in projects.
  • Versatile applications: This module is versatile and suitable for various applications, from automation, home automation and robotics to environmental and industrial monitoring.
  • STEM project: Develop and improve your STEM skills and acquire the knowledge, skills and experience needed to face the technological challenges of the future with this educational kit. This educational kit will trigger a number of processes such as problem-solving, investigative and creative thinking.
  • Made in Belgium: Whadda is a unique brand from Belgium’s Velleman Group that offers DIY projects for hobbyists or makers who want to immerse themselves in electronics, programming and mechanics.


  • Product basic info:
    • Instruction manual languages: English
    • Primary colours: Grey
    • Primary detailed colours: Metal
    • Additional colours: Black, White
    • Depth unit: 3.8 cm
    • Height unit: 15.5 cm
    • Width unit: 7.8 cm
    • Weight unit: 88 g
  • Technical data:
    • Specifications kits & modules: <ul> <li>measure the approximate flow of water in liters / hour</li> <li>simple square wave pulse signal output</li> <li>example sketch for Arduino available</li> </ul> <ul> <li>measurement flow range: 1 ~ 30 L / min</li> <li>working voltage: 4.7 ~ 15 V DC</li> <li>working current: = 10 mA (DC 5 V)</li> <li>working humidity: 35% ~ 90% RH (no frost)</li> <li>working pressure: <li>working temperature: -25 ~ 80 C</li> <li>external thread: G3 / 4 (3/4 inch)</li> <li>output connector: 2.54MM-3P</li> <li>output leads: yellow (DATA), red (VCC), black (GND)</li> </ul>
  • Operational properties:
    • Coding skill level: none
    • Electronics skill level: none
    • Mechanics skill level: none
    • Soldering skill level: none

Additional information

Weight88 g
Dimensions3,80 × 7,80 × 15,50 cm


Online Manual

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