PGA460: Measurement of sludge level

Alexandre Becker Filho

Part Number: PGA460

Hi,

I'm planning to measure the level of sludge accumulated in a large and deep tank, and I'm planning on using ultrasonic sensing. For that, i thinking of using PGA460 or TDC1000 but i don't know which one is more accurate for big depths (about 10m), what would you recommend for my project ?

over 5 years ago

0 Akeem Whitehead over 5 years ago

TI__Mastermind 27780 points

Hi Alex,
Please see the following E2E post for a similar Q&A: e2e.ti.com/.../778558

0 Alexandre Becker Filho over 5 years ago in reply to Akeem Whitehead

Prodigy 220 points

Thanks for your answer Akeem!
I read the post but i don't have much experience in ultrasonic, how could i choose the right transducer/frequency ? Do you have any literature to recommend to me ?
Besides, how can i avoid readings error caused by particles in water ??

0 Akeem Whitehead over 5 years ago in reply to Alexandre Becker Filho

TI__Mastermind 27780 points

Hi Alex,
To better understand how to select the best ultrasonic frequency and driver mode, refer to the "PGA460 Ultrasonic Module Hardware and Software Optimization" app note ( www.ti.com/.../slaa732 ).
Assuming the particles will be very small, they will will not reflect strong ultrasonic echos to be ignored by the sensors. Also, the bottom of the tank will return a much stronger, more stable, and predetermined signal to help discern any false-positives.

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PGA460: Measurement of sludge level