GC Accessories

Gas Flow
A C C E S S O R I E S
Flowmeters
Alltech Digital Flow Check Mass Flowmeters
NIST traceable calibration for seven gases
• Measure Air, Helium, Hydrogen, Nitrogen, Oxygen, 5% Argon/Methane and
Carbon Dioxide
• Water vapor will not affect readings—suitable for purge and trap applications
• +/-2% of reading accuracy insures your flow rates are on target
• DFC-HR high resolution model is ideal for low-flow applications
Alltech’s model DFC and DFC-HR Digital Flow Check flowmeters feature
unsurpassed versatility. Both models come standard with NIST traceable calibration
for seven gases making them suitable for GC applications such as monitoring
detector gases, packed column flow rates and determining split ratios. Flowmeters
can be used in SFC, SFE, and industrial hygiene applications as well as in the
general lab. Install flowmeters in-line for continuous flow monitoring to traps,
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sorbent tubes, incubators, fermentors or reaction vessels without interrupting gas
flow. Use flowmeters with either a positive or negative (vacuum) flow source.
The DFC and DFC-HR mass flowmeters incorporate a rugged solid-state sensor with microprocessor control that
measures true mass flow eliminating the ambient temperature and pressure change errors associated with other types
of flowmeters. Water vapor errors have also been eliminated. Flow measurements will be precise and accurate to
within +/-2% of your reading. Gas flow travels straight through the meter reducing backpressure, internal volume
and sensor purge time allowing for readings to stabilize quickly. Easily change between mass flow, linear velocity and
split ratio modes.
Both Digital Flow Check meters are shipped with an NIST traceable multi-point certificate of calibration
that includes percent error data. Meters are calibrated for seven gases using NIST traceable standards. Periodic
recalibration is recommended to maintain accuracy and compliance with ISO, GLP, GMP and other quality standards.
Model DFC Standard Mass Flowmeter has a measurement range of 0.1 to 300 SCCM for CO2 and 0.1 to 500 SCCM
for the remaining gases. It is lightweight, portable and easy to use. Display resolution of 0.1 SCCM makes it ideal
for most applications.
Model DFC-HR High Resolution Mass Flowmeter features a display resolution of 0.01 SCCM when measuring
below 10 SCCM providing a higher degree of precision required for low-flow applications such as setting capillary GC
flow or leak testing. Measurement range is 0.01 to 300 SCCM for CO2 and 0.1 to 500 SCCM for the remaining gases.
Use the autozero function to quickly zero the meter for current ambient conditions.
What’s included: Both models include 1 ft of 1/32" (0.8mm) i.d. silicone tubing, 1 ft of 1/8" (3.8mm) i.d.
silicone tubing, 2 barbed inlet/outlet fittings for each tubing size, a general purpose adapter to connect to Agilent
FID, splint vent traps, packed GC columns and gas lines, split vent adapter for connection to Agilent GC split vents,
and 9V battery. Model DFC-HR also includes a capillary column adapter. Replacement accessories on facing page.
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© Copyright 2004 Alltech Associates, Inc.
Suggested Flowmeter Applications
Low Flow Applications (DFC-HR )
• Capillary GC Flows
• Split Ratios
• Leak Testing
• Applications Requiring Precise Flow
Measurement Below 10cc/min
GC Applications (DFC and DFC-HR )
• Detector Gases
• Packed Column Flow
• Split Ratios
• Linear Velocity
Lab Applications (DFC and DFC-HR )
• Set Instrument Operating Parameters
• Industrial Hygiene Applications
• Monitor Flow to Traps, Sorbent Tubes,
Incubators, Fermentors & Reaction Vessels
• SFC and SFE Applications
• In-Line Applications
• Monitor Vacuum & Purging Processes
• Gas Blending
• Gas Sampling
Contact your Alltech office or distributor for current or local prices.