Custom made access control keypad with carbon pills

An access control keypad with carbon pills combines a molded rubber pressing surface with contact elements on the underside. It forms part of the user interface for entering commands or access codes. The layout, dimensions, color, and legends can be customized to the housing and circuit arrangement, with printed, raised, recessed, or colorfilled markings available as design options.

The carbon pills need to align with the corresponding contact areas throughout the assembled keypad. Key spacing on the front and contact positions on the back must therefore be developed together. A housing that shifts the rubber sheet or compresses one edge more than another can affect how individual keys move, even when the loose keypad looks symmetrical.

Consider the sequence of use as well as a single key press. Users may enter several digits rapidly, correct an entry, or operate a confirmation key at the edge of the layout. Each key should have room to move and return without dragging an adjacent key. Evaluate the actual enclosure, backing support, and fastener arrangement, including accessible edge presses.

Keep the carbon contact surfaces free from handling residue during assembly. On the exposed face, legends should remain unambiguous in their installed orientation, and cleaning should not leave deposits around the moving key edges. The finished access device determines electrical behavior and environmental protection; the rubber component must be integrated with that complete design.

Material options

Rubber. Custom formulation and color for the intended contact conditions.

Hardness selection

Rubber: 30–90 Shore A. An access control keypad with carbon pills combines a molded rubber pressing surface with contact elements on the underside.

Custom dimensions

The layout, dimensions, color, and legends can be customized to the housing and circuit arrangement, with printed, raised, recessed, or colorfilled markings available as design options.

Fit & assembly

The carbon pills need to align with the corresponding contact areas throughout the assembled keypad.

Use & inspection

On the exposed face, legends should remain unambiguous in their installed orientation, and cleaning should not leave deposits around the moving key edges.

Photos illustrate structure or material only. Each key should have room to move and return without dragging an adjacent key. ETOL directly manufactures custom-shaped silicone and rubber parts to your requirements.