Other Parts Discussed in Thread: FDC1004,
We are looking for guidance on a liquid level sensing application. Our liquid of interest is a refrigerant with a dielectric constant of 3.0. Our initial plan was to attach copper plates within the liquid and wire out to an external sensor board. The depth of the metal tank is around 3" and we expect the capacitance to change from 25pf to 250pf, not accounting for any cable parasitics. We are looking for +/- 5pf accuracy.
It isn't clear to us if the FDC1004 or FDC2112 is the right path or if neither is appropriate. We would love some guidance on this and any thoughts on detecting level change in a refrigerant such as ours, with a relatively low dielectric constant.
Thank You!