Diaphragm rupture signalling device

A diaphragm pump with a diaphragm rupture signalling device, the diaphragm pump having a diaphragm (1), a drive unit (2) and a delivery unit (3), the diaphragm (1) being arranged between the drive unit (2) and the delivery unit (3), the drive unit (2) having a drive means (4) that can be moved back and forth on a movement axis (B) and the delivery unit (3) has a delivery chamber (5) for receiving a liquid to be pumped, wherein the diaphragm (1) is movable by the drive means (4) so that liquid in the delivery chamber (5) is moved, wherein

• the diaphragm (1) has at least a first diaphragm layer (6) and a second diaphragm layer (7),
• the at least first and second diaphragm layers (6, 7) have a substantially circular periphery and a center point of the circular periphery and are in flat contact with one another,
• the diaphragm (1) has a clamping area (E) running around the entire circumference of the substantially circular periphery for clamping the diaphragm (1) between the drive unit (2) and the delivery unit (3) and an operating area (A) adjoining in the direction of the center point of the circular periphery,
• a sensor region (S) is provided in a sensor region section of the clamping area (E), in which sensor region at least one of the at least one first and at least one second diaphragm layers (6, 7) is designed such that, when the pressure between the at least one first diaphragm layer (6, 7) and the at least one second diaphragm layer (7, 6) adjacent thereto increases, the at least one first or the at least one second diaphragm layer (6, 7) moves further away from the adjacent at least one first or at least one second diaphragm layer (7, 6) in the sensor region (S) than in all other sections of the diaphragm (1), and
• wherein a signal reporting element (8) is arranged at the sensor region (S) of the diaphragm (1), which converts an increase in the distance between the diaphragm layers (6, 7) in the section of the sensor region (S) into a diaphragm rupture signalling signal and transmits it,
• characterised in that the sensor region (S) extends over the full extent of a circular path, which is substantially concentric with the circular periphery of the diaphragm (1).