AMS chip for ultrasonic water flow measurement
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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