Capacitive Thickness Gauges and Displacement Gauges: Frequently Asked Questions

conductor
The material and surface condition do not matter. Materials with a wire resistivity of a few kiloohms/cm or less can be measured directly. In addition, even insulators can have their total thickness measured if their surface is covered with a conductor.

semiconductor
While silicon-based wafers are generally fine, gallium arsenide-based and sapphire-based wafers may or may not be measurable based on their resistivity. Please contact us for details.

insulator
Glass, polyethylene, polypropylene, and other plastics. (Thin objects composed of a single material with uniform properties are the objects of measurement.)