The unit makes of ultrasonic transducers and measures the difference in the time it takes ultrasound waves to travel upstream and downstream, providing repeatable, temperature-stable and accurate timing measurements. Meters based on this principle are able to detect water leakage rates as low as 0.5 liters per hour.
The TDC-GP30-F01 includes an ultrasonic flow measurement front end, a low-power 32-bit processor and firmware for converting the sensor’s analog outputs to measurements of cold water flow, volume and temperature.
Drawing a continuous current of just 8.5-microamps when capturing flow measurements at a rate of 8Hz, the chip can operate for up to 20 years on the energy available from a single AA lithium battery. The TDC-GP30-F01 provides an SPI or UART or interface to an external microcontroller, or a pulse interface to emulate a conventional mechanical water meter’s signals.
Samples of the TDC-GP30-F01 and a demonstration kit are available. In volume the unit pricing is $9.50 in order quantities of 1,000.
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