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Capacitive sensors are constructed from many different media, such as copper, indium tin oxide (ITO) and printed ink. Copper capacitive sensors can be implemented on standard FR4 PCBs as well as on flexible material. ITO allows the capacitive sensor to be up to 90% transparent (for one layer solutions, such as touch phone screens).
Capacitive displacement sensor; Capacitive sensing; Displacement sensor (general article) ... Triangulation sensor; Touch switch; Wired glove; Sensor technology
Keyence is a fabless manufacturing company that sells a broad range of products, from the photoelectric sensor and proximity sensors to measuring instruments for inspection lines to high precision microscopes used in research institutes.
Capacitive displacement sensors share many similarities to eddy current (or inductive) displacement sensors; however capacitive sensors use an electric field as opposed to the magnetic field used by eddy current sensors [10] [11] This leads to a variety of differences between the two sensing technologies, with the most notable differences being ...
A touch switch is a type of switch that only has to be touched by an object to operate. It is used in many lamps and wall switches that have a metal exterior as well as on public computer terminals. A touchscreen includes an array of touch switches on a display. A touch switch is the simplest kind of tactile sensor.
An advantage of the capacitive technology is that the switch is not dependent on the flow of current through metal contacts to actuate. There is no debouncing necessary. The sensor tells enough about the distance of the keypress to allow the user to adjust the actuation point (key sensitivity).