1、cumulative time function；
2、Exceed press safety valve helping safe ensure.
3、Install power cut warning function.
4、high pressure and low pressure alarming function

5、（7F-5 Double flux) shunt design, two users are provided with oxygen at the same time.

6、（7F-5W with nebulizer function）provides atomization function, maximum nebulizing rate≥0.2mL/min
7、（7F-5 with cord controller）oxygen concentrator and oxygen intake device can be separated, to realize the remote control and use
continuous operation
 

7F-5

power supply：～220V±22V，50Hz±1Hz
size：445×372×680mm
oxygen flow：1～5L/min

oxygen concentration：≥90%
weight：28kg
input power：500VA
output pressure：30～70kPa
operation noise：≤60dB(A)

7F-8

Flow range: 0.5～8L/min 
Oxygen concentration：95.5%~87%
Output pressure: 40~70kPa
Pressure relief mechanism operates at: 250kPa±25kPa
Operation noise level: ≤55dB(A)
Input power: 500VA

7F-10

Flow range：0.5～10L/min
Oxygen concentration: 95.5%～87%
Output pressure: 40~70kPa
Pressure relief mechanism operational at: 250kPa±25kPa
Operation noise level: ≤60dB(A)
Input power: 850VA 
Minimum operating time: 30minutes