These small diaphragm pumps are used in several instruments used in hospitals & clinics. These units such as CO2 Monitors and Anesthesia Gas Monitors use these diaphragm pumps. Both 12 VDC & 24 VDC pumps are commonly used, due to the convenience of controlling the pump output precisely. These DC pumps are made using a unique feature of an oscillating arm, which makes them last a long time – in excess of 50,000 hours. These small pumps operate without the use of traditional DC motors with eccentric and connecting rod which are prone to early failure.