TDC1000-TDC7200EVM: How to perform water level sensing for bigger tanks using TDC7200-TDC1000 EVM

Shankaranarayanan P V

Part Number: TDC1000-TDC7200EVM

Hello, I am using TDC1000-TDC7200 EVM development board for water level sensing, currently, I am testing it with an acrylic container with a height of approximately 12cm and width of 6cm. For which I am using a 1MHz transducer and it works perfectly. Now, I need this to sense the water level of a tank of approximately 2-meter height and width of 1 meter. So, how should I choose my transducer and what frequency should it be so that measurements can be accurate? I have gone through the application notes but still cannot figure. Would someone help me!

over 7 years ago

0 Scott Cummins over 7 years ago

TI__Mastermind 31655 points

Hello,

Please review the FAQ here: e2e.ti.com/.../3611.everything-you-need-to-know-for-ultrasonic-tof-liquid-coupled-collateral-tools-designs-faq

There are notes on how to determine the time of flight for any given distance. With this you can choose a transducer frequency that will give you the resolution you need for your application.

In general, 1Mhz is a good frequency for level measurements as it provides a good compromise between attenuation over distance and resolution. Going to a 2 meter tank should not require a change in frequency, but if you find that the amplitude of the return echo has decreased too much, you may wish to buy a larger transducer capable of greater SPL.

Regards,

Sensors

Sensors forum

TDC1000-TDC7200EVM: How to perform water level sensing for bigger tanks using TDC7200-TDC1000 EVM