MULTI-SWITCHABLEMICRO DISPENSERCHIP-SETFOR PORTABLEHEALTH CARE DEVICES
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system that hasnodeadvolume. Pneumatic (airpressure drive )microdispenser system without anydeadvolume ofsample wasdeveloped successfully. The102.OPERATIONPRINCIPLEOF directional switching valve chipandthesampling chipasthe PNEUMATICMICRO DISPENSERSYSTEM componentofthisdispenser weredeveloped successfully. The sampling chipcandivide liquid every1 L or0.5gL without any Microchemical devices needdispensing devices that can deadvolumeofsamplebydecompressing andthecompressing air.Thissimpleoperation iscausedbytheoriginal novel efficiently divide asample inside thechip. ArepobyKuwata detecting methodofmicrofluid andcheckvalves ofhatshape.etal.[13] describes anovelsliding microdispensing device Theswitching valve chipselects theoutlet thatinjects the thatiscapable ofdispensing liquids withnanoliter precision. dispensed sample. Thischiphasaspecial rotary mechanismHowever, asignificant volumeofliquid remains inthedevice withthesilicone rubber leak-preventions andtheprecise auto-whentheliquid isdivided. Wespeculated that ahigh-powered positioning mechanism, Thischip canswitch tenoutlets bybuilt-actuator wasneeded toslide theglass andproposed anairinmiclro solenoid (1IN 6VDC)undelrhigh leakage plressulre*