Fugu Foot Pedal (Fugu = Blowfish)
The pedal is filled with air and has not components inside. The soft pedal is sensitive all around and easy on the foot. Your foot can easy rest at any angle and position.
There is a hollow hose that is connected to the pedal, not copper wire. The air then goes into the "Switch Box" where the switch it. It sensitive and picks up any slight pressure on the pedal.
Check out the Demo Video.