Hithesh,
LDC10xx are L-to-D converters. They not only can measure L but also can measure Rp. Here is the link to the LDC1000 datasheet:
http://www.ti.com/lit/ds/symlink/ldc1000.pdf
LMP91300 is a programmable industrial inductive proximity sensor:
http://www.ti.com/lit/ds/symlink/lmp91300.pdf
Don Liu