Resettable pressure differential gauge with memory

Pressure difference indicating device for compressed air systems, characterized in that it comprises;

• at least one first air inlet duct (1) for inlet of compressed air into the device body before an inlet of an equipment positioned in a compressed air line, and at least one second air inlet duct (2) for inlet of compressed air from the equipment into the device body,
• a pressure control cavity (4), divided into at least two sections by at least one cover (3), internal volume of the cover (3) configured to prevent the passage of air, for filling with compressed air from the first air inlet duct (1) on one side and with compressed air from the second air inlet duct (2) on other side, such that the cover (3) moves in the pressure control cavity (4) depending on pressure difference,
• at least one pressure differential needle (5) located in the pressure control cavity (4) and connected to the cover (3), such that the pressure differential needle (5) moves with the cover (3) depending on the pressure difference,
• a rack and pinion gear (7) comprising at least one needle cavity (6) such that the pressure differential needle (5) enters and advances into the needle cavity (6) due to an increase in the pressure difference, the rack and pinion gear (7) is triggered and then moves by the movement of the pressure differential needle (5) and the pressure differential needle (5) is removed from the rack and pinion gear (7) without moving the rack and pinion gear (7) due to a decrease in the pressure difference,
• at least one pressure control spring (8) enclosing the pressure differential needle (5), such that the pressure control spring (8) allows the movement of the cover (3) and the pressure differential needle (5) to be transmitted to the rack and pinion gear (7) in a controlled manner, the pressure control spring (8) being compressed between the cover (3) and the rack and pinion gear (7) due to the increase in pressure difference and relaxed due to the decrease in pressure difference,
• a pinion gear (9) in contact with the rack and pinion gear (7), the pinion gear (9) is triggered and then moves by the movement of the rack and pinion gear (7) and a pointer (10) configured to move in connection with said pinion gear (9),
• a dial (11) on the body for indication of the life-use status of the equipment by means of the pointer (10),
• a reset lock (12) in contact with the rack and pinion gear (7), the position of the rack and pinion gear (7) is changed by means of the pressure differential needle (5) due to the increase in the pressure difference, so that the position of the rack and pinion gear (7), the pinion gear (9) and the pointer (10) is returned to the initial position, and a reset key (13) for unblocking the reset lock (12).