... Channels,≥2μm,≥3μm,≥4μm,≥5μm,≥6μm,≥10μm,≥12μm,≥15μm,≥20μm,≥25μm,≥30μm,≥40μm, ≥50μm,≥60μm,≥70μm,≥80μm,≥90μm,≥100μm6 user ... -defined channels can be set at random by user.• Channels of the Chinese Pharmacopoeia¦ ≥10μm ... μmChannels of anesthesia apparatus¦ 4μm~6μm,≥5μmChannels of transfusion¦ 15μm~25μm,≥25μm 20μm(GB8368-1998)• Measurement Range¦ 0~9999999 ...