The Gelbau Quadro-Profile is used primarily in the field of local public transport, where it is installed as a safety feature for the closing edges of passenger doors in buses and trains. The EPDM profile can be used only in conjunction with a sealing profile. It is simply pushed into the hollow chamber of existing or newly developed sealing profiles. The profiles have a diameter of 18 mm or 22 mm, and require a sheath-profile with a hollow compartment minimum diameter of 21.5 mm or 25.5 mm. The profile is characterised by a high level of sensitivity.
The Gelbau Quadro-Profile has an action range of 360°, and is fully insulated on the outside. When the conductive zones are touched due to mechanical pressure, this results in electrical contacting. At least three out of the four electrically conductive zones will always touch each other when subjected to mechanical pressure, thus ensuring reliable contacting. The evaluation electronics here open the potential-isolated safety contact, which triggers opening of the door. The high contact pressure achieved thanks to a small contact area assures self-cleaning of the contact surface.
The system components available for the Gelbau Quadro-Profile are: evaluator, plug connector with connecting cable, terminating plug connector with resistor, flexible wire jumper, and end cap. Using these components guarantees a switching sensitivity down to the very last millimetre.