CY8CKIT-22 liquid level sensing 48cm level

user_1214886 · ‎Feb 12, 2019

Hi,

We are using CY8CKIT-22 to develop liquid level sensing for drinking water containers.

We are testing the sample with a bottle in the kit and it works very well. Before we made the next step, we would like to hear your opinion if we can hit any problems with our sensor.

The container is 48 cm high therefore we have design cap sensor 48 cm length with two differential pols. The gerberas are in the attachment. The container wall is 5mm thick.

Thank you for your advice.

Regards,

Blaz Selekar

ShanmathiN_06 · ‎Mar 06, 2019

Hi Blaz,

Yes, if you use segmented sensors, then Cp will be less. So, you could use that.

We are planning to use the CY8C4025LQI-S401 how many segments can we read with this MCU?

It is just a pin out limitation. You could use PSoC creator and drag down components in the schematic and check how many pins are available as segments.

For temperature compensation, if possible, you could use a reference sensor that is not subjected to any temperature variations and use that as a reference for the liquid-level sensors.

Please ensure that your SNR might be less since you are using a thick overlay with lesser dielectric constant. You can use firmware filters to reduce noise and increase resolution to increase signal.

Thanks,
Shanmathi

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CY8CKIT-22 liquid level sensing 48cm level

CY8CKIT-22 liquid level sensing 48cm level

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