IMPAtactile, for example, supplements IMPAfeel with an additional, noticeable feedback: Every time a keystroke or control command is recognized or executed, the HMI vibrates briefly. The operator therefore not only knows that his finger is at the right place (IMPAfeel), but also that the control system has executed his command (IMPAtactile).
No need to take your eyes off the process.
By the way: It is not at all easy to make a fully bonded sheet of glass vibrate on a small control panel equipped for IP68. But we will find the right solution for your application. That’s a promise!