Not all switches contain moving parts. There are touch switches available that will open or close their respective circuit upon contact. Piezo switches, for instance, are touch switches. They feature a piezoelectric element without relying on moving parts. While all piezo switches contain a piezoelectric element, they are available in different types. Below are six things to consider when choosing a piezo switch.

#1) Faceplate Material

Piezo switches are available in different faceplate materials. The faceplate is the top layer. Some piezo switches feature a stainless steel faceplate, whereas others feature an aluminum faceplate. You can even find piezo switches with a glass or plastic faceplate.

#2) Display

It’s not uncommon for piezo switches to feature an integrated display. But some of them have different displays than others. There are piezo switches with a liquid-crystal display (LCD), and there are piezo switches with a vacuum fluorescent display (VFD). If you’re looking to buy a piezo switch with an integrated display, you should consider the specific display technology.

Keep in mind that different display technologies require different backlighting. LCDs typically use light-emitting diode (LED) backlighting. Other display technologies may use an alternative type of backlighting.

#3) Back Panel Material

In addition to the faceplate material, you should consider the back panel material when choosing a piezo switch. The back panel, of course, is the back layer. It’s available in many of the same materials as faceplates, including various metals, alloys and plastic.

#4) Bezel Size

Don’t forget to consider the size of the bezel. The bezel, of course, is the frame or border. It’s a common part of many smartphones, tablets and switches. Piezo switches will typically feature a bezel. The size of the bezel, however, may vary. Some piezo switches have a thick bezel that encompasses more space, whereas others have a thinner and smaller bezel.

#5) Clear vs Colored Lenses

You can choose piezo switches with either clear lenses or colored lenses. Piezo switches are often manufactured with lenses or windows. Backlighting will create light that shines through these lenses or lenses. Regardless, some piezo switches feature clear lenses, whereas others feature colored lenses.

#6) Adjustable Sensitivity

Can you adjust the sensitivity of the piezo switch? If not, you may want to choose a different piezo switch. Some piezo switches have a fixed sensitivity, meaning you can’t make them more sensitive or less sensitive to your touch commands. But other piezo switches feature an adjustable sensitivity.