Flow meter uses time-of-flight technology to send and receives ultrasonic waves

27-03-2015 | Mouser Electronics | Test & Measurement

Aimed at applications such as ultrasonic heat, cooling and flow meters,
Mouser now stocks Maxim's MAXREFDES70# heat and flow meter which uses
ultrasonic time-of-flight (ToF) to send and receives ultrasonic waves
between piezoelectric transducers in both the upstream and downstream
directions in a pipe.

An accurate flow rate can be calculated by measuring the ToF difference
between the upstream and downstream wave travel with digital signal
processing. The MAX35101 time-to-digital converter is the centre of the
heat/flow meter system. The MAX35101 integrates the functions needed for
automatic ToF measurements, including the ultrasonic pulse launching and
detecting, ToF calculating, temperature measurements, and a real-time clock.

The MAX35101 can operate in various configurable automatic even timing
modes, requiring minimal interactivity from a host microcontroller and
reducing the power consumption of the system.

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