I would like to detect a metal/non-metal objects using Proximity Capacitive Sensors. I have gone through the web and found AD7151/7150 capacitive sensors. I have gone through the datasheet of those and noticed that when we bring hand closer to the plate the sensor will give us output. Since our hand acts as Ground it may work since there is a change in capacitiance(Cx).
BUt my doubt, Does the AD7151/AD7150 detects the Non-metal / Metallic Objects? If we bring any plastic/metal near to the sensor plate Cx will AD7151/7150 give us output?