- Pump is powered by a miniature DC motor drive, which drives internal mechanical eccentric motion to reciprocate the diaphragm. The pump chamber uses fixed volume air compression: during compression, the suction port closes and the exhaust port opens, creating slight positive pressure; during stretching, the exhaust port closes and the suction port opens, forming negative pressure. This pressure difference allows gas to be drawn into the pump chamber from the inlet and discharged through the exhaust port. - Mainly used in medical applications, gas analysis sampling, instrumentation, and other fields. Fully maintenance-free, oil-free design that does not pollute the transmission medium. Compact, stable, and reliable; suitable for handheld instruments, with low noise and low power consumption. Especially suitable for environments requiring high negative pressure. Type: DC12V Mini Vacuum Pump Operating Voltage: DC 9V 14V Rated Voltage: DC 12V Current Rating: 500mA Power Rating: 6W Suction Capacity: 5L/min Vacuum Degree: 65kPa Maximum Pressure: 120kPa Noise Level: Less than 60dB Compatible with tubing sized 4.56mm. Maximum outer diameter of connector is 6.5mm. Color: Silver + Black Material: Metal + Plastic Package Contents: 1 x Vacuum Suction Pump Note: Other items not included. Light and display differences may cause slight color variations between the image and the actual item. Measurement allows an error of +/- 13cm.