Pike Technologies Comprehensive Catalog of FTIR ... - Madatec

Long-Path Gas Cells –
For Measurement of Low Concentration Vapor Components
Long-Path Gas Cells
2.4 M Meter Gas Cell
F EATURES O F T HE L ONG-PATH G AS C ELLS
• Long-path gas cells for measurements of vapor species to
ppb levels
• Fixed and variable pathlength versions
• Heated versions available
• For most FTIR spectrometers
PIKE Technologies offers several Long-Path Gas Cells for analysis
of trace components in gas samples – typical concentrations may
range from the percent to ppb levels. The long-path cells feature
a folded path design providing an extended pathlength within a
compact dimension. The FTIR beam enters the cell through an IR
transparent window and reflects a number of times between the
accessory mirrors before exiting to the detector. The number of
reflections is determined by the optical configuration of the cell
and may be selected as a permanently aligned version or
adjustable by the user (variable path cells). Typical applications
of the long-path gas cells include air pollution studies, gas purity
determinations, monitoring of industrial processes, exhaust gas
analysis and many others.
All long-path gas cells offered by PIKE Technologies are
manufactured by Infrared Analysis, Inc., pioneers in the
development of gas analysis technology.
Permanently aligned long-path gas cells. All cell assemblies
include a heavy wall borosilicate glass tube mounted on a corrosionresistant
anodized aluminum base. The base includes spectrometerspecific
transfer optics allowing placement of the accessory in the
sample compartment of the FTIR. Infrared transparent windows
serve as beam entry and exit ports (windows are easily replaceable
and different window materials are available). The top of the cell
is enclosed by the valve/gauge assembly with all the valves made
of stainless steel. The accessory mirrors are mounted permanently
with chemically inert cement at the bottom of the cell and the
facing part of the top enclosure. The gold coated mirrors have
protected surfaces and the gas cells can be cleaned with detergent
and water without loss of cell throughput or alignment.
Variable-Path gas cells. The construction and main components
of the variable-path gas cells are identical with those described
above, with an exception of the internal mirror assembly. The cell
has two adjustable mirrors located at the top of the enclosure
(controlled with a calibrated dial) and one stationary mirror
cemented to the cell base. Adjustments to mirror positions allow
selection of different pathlengths supported by the cell.
Some gas measurement applications require temperature
control for higher precision or to prevent condensation of specific
components. PIKE Technologies offer heated versions of our fixed
and variable path gas cells.
2.4 m 10.0 m 22.0 m 33.0 m 1-16 m
Fixed Fixed Fixed Fixed Variable
Base Path 5" 10" 22" 22" 10"
Body Material Glass Glass Glass Glass Glass
Optics Coatings Gold Gold Gold Gold Gold
Window Material KCI KCI KCI KCI KCI
Window 37.5 x 4 mm 25 x 4 mm 25 x 4 mm 25 x 4 mm 25 x 4 mm
Dimension
# Window 1 2 2 2 2
Cell Volume 0.1 liter 2.3 liter 8.5 liter 8.5 liter 2.3 liter
Specifications for Long-Path Gas Cells from PIKE Technologies
T RANSMISSION S AMPLING P RODUCTS – A UTOMATED AND M ANUAL T ECHNOLOGIES
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