LDC1000EVM: Detecting progression of rusting

Part Number: LDC1000EVM

Hi ! 

I am working with iron powders or very thin iron sheets . I am setting up a test rig using LDC1000 to help understand the extent of oxidation ( rusting) in iron powder or sheets . In the experiments carried out we did notice the reduction of inductance value as the samples got oxidized or rusted .

I am looking for help in terms of increasing the sensitivity and also develop  means  to enhance / increase the inductance change for small changes in oxidation ( rusting) . 

Appreciate all responses , help advice .  Thanks a lot in advance ,