Omron was founded in 1933 with the creation of electronic thermometers and electronic blood pressure monitors, and it was also the first Japanese electronics manufacturer to establish an investment company in China. Omron does not have a 5L medical oxygen concentrator on sale, and the products on the market are 3L or 2L low-flow models, although the products are OEM by Chinese factories, but the quality is still guaranteed.
 
Its 3L model HAO-3210 is the same as Yuyue 8F-3AW, the operating power is slightly larger, the power consumption is slightly higher, and the gap between it and Philips K3B-PH is not big in other aspects, the price is 2980 yuan, which is slightly more expensive than Yuyue 8F-3AW. The 2L model HAO-2200 does not have casters, which is inconvenient to move compared to the Yuyue 8F-2A, and there is no remote control function, so the ease of use is insufficient.