Piezo Switches

Piezo Switches can be very effective where the interface calls for reliable performance in extreme conditions.

How a Piezo Switch Works

Finger pressure on the surface of the housing causes the housing to flex very slightly (approx. 2 microns)
Pressure activates a piezo crystal which emits low level a signal which is amplified by electronics built into the housing.

Advantages of Piezo Switches

No moving parts so reliability is typically >20 million cycles
Tamper proof housing
Impervious to weather, chemicals, beverage spills etc
Available in various housing materials
Requires no external power source
Highly resistant to external impacts