Ultra-low power water flow measurement for AMR reference design

Ultra-low power water flow measurement for AMR reference design


This fully tested reference design demonstrates a low-power solution for electronic measurement of water flow through a mechanical meter and provides a single-chip platform for flow measurement and wireless communications. The design is ideal for water meter automatic meter reading (AMR) modules that add wireless communications to existing mechanical meters. The RF subsystem supports standard protocols such as wireless M-Bus or proprietary protocols in the Sub-1 GHz ISM bands. This reference design offers the ability to accurately read the mechanical rotation from longer distances, and provides greater reliability. The ultra-low power consumption reduces the battery requirement and extends product lifetime.


  • Single-chip integrated solution with flow meter metrology and RF communications subsystem
  • Meets measurement accuracy requirements of ISO4064-1:2014-11 (Class 1)
  • Consumes 1.83 µA while sampling at 16 Hz with 3.3-V power supply
  • Accurate measurement at up to 5.8 mm from rotating disc
  • Complete tested reference design with firmware, design files and test report

Ultra-low power water flow measurement for AMR reference design – [Link]

Mike is the founder and editor of Electronics-Lab.com, an electronics engineering community/news and project sharing platform. He studied Electronics and Physics and enjoys everything that has moving electrons and fun. His interests lying on solar cells, microcontrollers and switchmode power supplies. Feel free to reach him for feedback, random tips or just to say hello :-)

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