The uFM-TOP Microflows Meter, Manual and Auto models

 A new invention and little revolution in the very low flow rates measurements,
​from few mL/min to nL/min  

MicroFlows Meter Manual

MicroFlows Meter Automatic

For more information, please review the brochure  
​         “The uFM-TOP Microflows Meter, Manual and Automatic Models”       (pdf file)

 Features:

 - Measurement of very low flow rates of gases, well below the smallest ranges of currently available flowmeters
- Miniscule pressure differential between source and atmospheric pressure
- Manual and automatic models
- Various ID of borosilicate glass capillaries can be used,
- Three valve system for easy manipulation of liquid introduction and experimentation
- Downward or upward flow of the formed column of liquid
- Low dead-volume design
- Precision ruler, mm and 0.5 mm scale
- Can carry out long measurements (e.g. from minutes to many days)
- Complete systems, various accessories supplied
- Simple operation, similar to soap bubble flowmeter
- Easy to interface to some gas (Helium) pycnometers, e.g. VersaPyc, for permeability studies
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​ Applications:
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- Permeability of gases through membranes, films, rock-core samples
- Detection and measurements of evolution of gases from biological samples
- Leak detection equipment
- Calibration or verification of other low flow sensors

The pV/T Master and uFM-TOP Microflows Meter as a permeability setup for measuring very low flow rates through rock core samples at low pressures.

The pV/T Master is capable of measuring density, porosity of porous materials, and gas transport rates through various barriers using special adapters. For measuring permeability of sandstones and carbonates below 1 mDarcy, the usage of soap bubble flowmeters is not practical and measurement of very low flow rates can be accomplished by using the uFM-TOP Microflows Meter, either Auto or Manual models. This simple, steady-state, and low pressure method (up to few atmospheres) eliminates usage of high pressure setups. 
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Permeability Setup for very low flow rates

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Leak testing setup for measuring gas flow rates through valves, in over the seat and and under the seat directions. The gas of known pressure is supplied to the valve and the leak rate is measured by the microflows meter.  Due to the small size of the valve housing, such assembly can be placed in a temperature controlled chamber to evaluate the valve performance in  a given temperature and pressure ranges. 
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Leak testing setup: uFM-TOP Manual model and the solenoid valve testing assembly

Manometric or Flow Through Permeation Cell and uFM-TOP Microflows Meter

 The very capable, simple, and inexpensive permeation setup for measuring gas transport rates (GTR, OTR) through membranes, films, or thick (many centimeters) samples. Special design of the permeation cell allows for study of permeability of various gases and provide answer on how the gas transport rates are affected by presence of water and organic vapors for a given carrier gas. There is no need to cut circles as the sample can be in a form of a wide strip. The user determines the gas pressure which is supplied to one side of the sample while the opposite side is supported by a SS fritted circle of fine porosity. The permeated gas flow rate is measured by either the Manual or Automatic FM-TOP Microflows Meter. For other then ambient temperature, the permeation cell can be placed into a suitable temperature controlled chamber, up to 200 ºC. The cell can be constructed to adopt various diameters of the active area of the sample. The low end of flow rates can reach nL/min range. Gas permeability versus pressure, temperature, and history of the sample can be studied.  

  For any question please contact us via e-mail only: [email protected] ​

INSTRUQUEST INC.  SCIENTIFIC INSTRUMENTS R&D