• State Resolved
  • Locked Locked
  • Replies 1 reply
  • Subscribers 30 subscribers
  • Views 143 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

FDC1004EVM: Want to use FDC1004 for limescale detection in domestic electric water heater.

HRIDAY MAHESHWARI
Prodigy 10 points
Part Number: FDC1004EVM
Other Parts Discussed in Thread: FDC1004

Tool/software:

Hi Texas Support Team,
I have been working on a project where I want to detect the limescale deposition on a surface. Is FDC1004 any good for it as it mentions material sensing in its application portfolio.

The idea is that as the limescale gets deposited, it will reduce the capacitance. However, I have not seen the FDC1004 used for any kind of solid material sensing.

Can this be done using a simple metal plate sensor electrode, and ground being the surface? 


Thanks, and regards

  • +1
    TI__Mastermind 40295 points

    Hriday,

    Your proposal may work, but to honest, we have no experience with lime material.

    It might be worth researching the relative permittivity and conductivity of lime-scale. If it greater than unity, you may be on to something.
    Depending on the size/area of your electrodes, the gap between the active electrode and the ground electrode could be critical.

    You could probably use the ideal capacitor equation to get started and base any prototypes on those calculations
    As a guess, it might be good to lean towards a smaller gap than a larger one. 

    reagrds,
    John