Page 32 - Basic Gas Chromatography
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Overview 19 Measurement and Control Flow sensor solid-state a uses device electronic sophisticated more Another, the of for measurements flow accurate permit to microprocessor a with coupled carrier the sensor silicone-on-ceramic A bubbles. soap using without gases of range a in run oxygen, air, for mL/min 500 to 0.1 of rates flow measure to used b
Instrument independent conditions, programmed used is the to control flowmeter soap-film buret) or soap a soap through gas carrier are meters light with easier and type. electronic
column, these a during sensor pressure pressure soap-bubble The 2.2). pipet bulb, rubber several timed the flow made faster is rate. from Gas chromatograph digital
the Under electronic the electronic a are (Fig. modified a After gas. accurately measurement, electronic are meter flow the [ (6) type
through valve. electronically An flow. increase by devices device a (usually squeezing flowing is bubble this Some measurements flow of film soap
rate purge and rate used measuring By the one From electronic readout Q_) (a) (a)
flow the of increased constant rate flow tube flows. of tube, calculated. the but an three-digit ~~ Soap meters:
same closing be can a flow constant commonly flow calibrated gas path the stopwatch. easily $300, Flow
the and maintain (decreasing) a Measurement most electronic a carrier the into wet to a with is principle, around a provides 2.2. Fig.
maintains opening pressure to providing two digital merely the allowed volume mL/min same cost
18 gas order the Flow The is which raised in the a and