We can offer you keys with a double function. With a first normal press, the operator activates the first circuit and associated function. When pressing harder, a second, underlying connection is made to another function, with or without a corresponding click.
Triple key is a combination of a ClickTouch Dome, Metal Dome and Force sensing. Different stack-ups, with their own functions, are possible.
A first soft ClickTouch Dome makes the operator aware that he has launched an action. Then we have, through a force sensor, a certain operating range, for example to regulate a speed. Finally a Metal Dome that indicates that one is at the end of the range.
In another stack-up one can generate a redundant “double click” system. A pressure sensor is mounted under a traditional double click to validate the circuit and make it “redundant”.