Our Mini Differential IR Height Sensor is a contactless Z probe for 3D printers.

Unlike capacitive and inductive sensors, our sensor measures the height to the top surface of a glass bed, not the distance to a backing plate. A red LED indicates when the head is at or below target height.

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PanelDue is a full-colour touch-sensitive graphical control panel for 3D printers. It is compatible with printer electronics running RepRapFirmware and now Repetier. Support is being added to Smoothieware.

Details here