20562
Manual Bubble Flowmeter (Standard Version)
flow meter volume 10 mL, pkg of 1 ea
Synonym(s):
FLOWMETER 10CC EA
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About This Item
UNSPSC Code:
41112500
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packaging
pkg of 1 ea
technique(s)
gas chromatography (GC): suitable
flow meter volume
10 mL
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General description
Bubble flowmeter is a simple and precise way to measure flow rates of gases.[1] It is the most common device for measuring a volumetric flow rate. This unit has a buret of appropriate volume fitted with rubber bulb at the bottom and a side arm. Air is passed into the buret and the bulb filled with soap solution is squeezed. This causes a soap bubble to enter the buret. The time taken for the bubble to travel in considered as known volume, used to calculate the flow rate.[2]
The most basic configuration of a bubble flowmeter is a calibrated tube, a stopwatch, and a good eye. The bubble is timed as it moves up the calibrated tube between two markings. Flow tubes are graduated as follows:
- 10 mL tube in 1 mL increments
- 25 mL tube in 5 mL increments
- 50 mL tube in 10 mL increments
- 100 mL tube in 20 mL increments
Application
Bubble flowmeter may be used to manually control the flow at the system outlet during analysis of perfluorobutane (PFB) in the exhaled rat air using respiration-metabolism chamber system and a GC-MS method.[3] Bubble flowmeters can be used to check splitter or detector flow or to calibrate personal pumps for accurate air sampling.
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The accuracy of the bubble meter method for gas flow measurements
Levy, A
Journal of Scientific Instruments, 41, 449-453 (1964)
Arthur C. Stern
Air Pollution: Measuring, Monitoring, and Surveillance of Air Pollution , 160-160 (1976)
Steinar Uran et al.
Journal of pharmaceutical and biomedical analysis, 39(3-4), 746-751 (2005-06-21)
Sonazoid is a new contrast agent for ultrasound imaging comprising an aqueous suspension of lipid-stabilised perfluorobutane (PFB) gas microbubbles. A respiration-metabolism chamber system was developed to collect exhaled air following intravenous administration of Sonazoid to rats. Analysis of PFB in
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