The HNmB series, similar to its predecessor the HNB series, is an advanced device that produces nanobubbles instantly without the need for liquid circulation. While this system may generate some micro-bubbles and macro-bubbles, it still achieves exceptional gas transfer efficiency. However, like the HNB series, the HNmB series requires high pressure and consumes a significant amount of power, resulting in higher operational and maintenance costs. Despite these challenges, the HNmB series represents a significant technological advancement and offers unparalleled nanobubble performance.