The DH-Sensor-KIT edge is designed to ensure the safe operation of sectional doors. When the gate hits an obstacle, the tube is deformed, the internal volume in the tube is reduced, and the sensor is triggered. The sensor sends a signal to the control unit to stop or reverse the gate. The tube for the safety device (art. TUBE-SAFETY) is installed in the lower door seal. The length of the tube in linear meters is calculated depending on the width of the gate.