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TDC1000: Sucrose measurement

HARINI KRISHNA
Expert 1905 points
Part Number: TDC1000
Other Parts Discussed in Thread: TUSS4470

Hi,

Can TDC1000 be used to measure the sugar content in hot coffee/ tea?

Thankyou

Warm Regards

Harini Krishna 

  • 0
    TI__Mastermind 27950 points

    Hi Harini,

    We do not have experience with this particular combination of sugar content in coffee/tea, but assuming the expected range amount of sugar content is able to change the acoustic impedance properties of the beverage itself, it may be possible to use ultrasonic sensing to monitor the change in the speed of sound.

    Though the TDC1000 can be used for fluid identification/concentration measurements, we recommend the TUSS4470 device instead.

    Refer to the ultrasonic application table of the Ultrasonic Sensing FAQ page for an explanation on this use-case: https://e2e.ti.com/support/sensors/f/1023/t/748143

    The fluid ID/concentration implementation of the TUSS4470 will be similar to that of the TDC1000.

  • 0 in reply to Akeem Whitehead
    Expert 1905 points

    Hi Akeem,

    I found a resource online

    link :  https://sci-hub.tw/10.1111/j.1365-2621.1992.tb01218.x 

    They have used ultrasonic sensor to measure the amount of sugar in different fruit juices and beverages. 

    the average sugar added in a cup coffee of size 180ml is approximately 12gms. 

    Can this 12 gms of sugar be detected?

    what  is the minimum quantity of sugar that can be detected using ultrasonic?

     Do you have any extra information regarding this which could help us?

    Thankyou

    Regards

    Harini Krishna

  • 0 in reply to HARINI KRISHNA
    TI__Mastermind 27950 points

    Harini,

    Assuming the concept suggested published in the International Journal of Food Science and Technology report is valid, you may be able to use ultrasonic to detect concentration differences via changes to the speed of sound on the scale of tens of grams (figure 4 of the report).

    As previously stated: "We do not have experience with this particular combination of sugar content in coffee/tea...". I recommend using the TUSS4470 with a high-frequency transducer (1MHz). You will need to position the transducer perpendicular to the liquid level such that it is pointed at a fixed/known distance (side to side of cup) to monitor changes in the speed of sound.