Capacitive hidden switch provides a switchless design

05-04-2022 | Rutronik | Connectors, Switches & EMECH

The Capacitive Hidden Switch from Schurter, and available now from Rutronik, functions entirely without mounting holes in the user interface and can be attached in hidden places. This invisible installation makes it especially suitable for devices with high hygiene standards, such as medical technology or the food industry. Also, it creates new possibilities for the design of user interfaces.

The capacitive switch triggers completely with no direct sensor contact with the finger. Instead, it utilises an electrical field on the sensor's user interface. As soon as an electrical field change occurs, the switch reacts. It is also possible to use non-conductive materials, including glass, plastic or wood, between the sensor and the surface.

Due to the invisible installation, it contributes to a simplified cleaning of the device. Using transfer adhesive tape, the device is attached behind the surface. This means that no drill holes or plug-in slots are needed. Also, there are no moving parts. Bacteria, viruses, or fungi can hardly settle on the user surface.

It has a high tolerance to wiping movements or liquids and only triggers when the button is touched exactly. The user surface between sensor and finger for optimal functionality may be up to 2mm, and customised adaptations are possible.

The quasi-invisible mounting of the switch results in a further advantage – the appearance remains switchless. For industrial designers, it creates more flexibility and freedom in the user interface design.

The switch is available in three versions: The CHS 1 comes without illumination. It is the optimal solution for space-constrained designs with a mounting depth of less than 6mm; CHS 2 offers optical feedback. The RGB lighting can be used as a design element; and the CHS 3 is the potted version with lighting for demanding use in tough environments.

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