'''Capacitive displacement sensors''' are a kind of non-contact [[Displacement measurement|displacement sensor]], described as "non-contact devices capable of high-resolution measurement ofmeasuring the position and/or change of position ofin capacitive anymaterials conductiveto target"a high resolution.<ref name="LionCapOverview">[http://www.lionprecision.com/capacitive-sensors/index.html#apps Lion Precision Capacitive Sensor Overview], An overview of [[capacitive sensing]] [[technology]] from Lion Precision.</ref> They are also able to measure the thickness or density of [[Non-conductor|non-conductive]] materials.<ref name="SensorTechHandbook">{{cite book|isbn=0-7506-7729-5|title=Sensor Technology Handbook|page=94|url=https://books.google.com/books?id=fdeToUK8edMC&pg=PT94|author=Jon S. Wilson|publisher=Newnes|year=2005}}</ref> Capacitive displacement sensors are used in a wide variety of applications including [[semiconductor]] processing, assembly of precision equipment such as [[disk drive]]s, precision thickness measurements, [[machine tool]] [[metrology]] and [[assembly line]] testing. These types of sensors can be found in [[machining]] and [[manufacturing]] facilities around the world.