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S PEC SHEET
IMACC FTIR Open Path Monitoring System
The IMACC Fourier Transform Infrared (FTIR) Open Path Monitoring
System is an industrial monitor utilizing infrared technology to provide
real-time measurements of up to 200 different gases including
organics, inorganics, acids, and volatile organic compounds.
DESCRIPTION AND PRINCIPLE
OF OPERATION:
THE MOST CUSTOMIZABLE AND HIGHLY
VALUED EQUIPMENT IN THE BUSINESS:
The IMACC FTIR Open Path
Monitoring System uses a 12”
optical telescope to transmit an
infrared beam through the air,
monitoring compounds present in
the air mass.
IMACC FTIR Monitoring Systems employ a
unique design, incorporating a standard base unit
with additional monitoring accessories that allow
multi-functionality to suit both monitoring and
financial needs.
IMACC’s FTIR Monitoring Systems
maintain optimum alignment in the
harshest environments with ease, standing
up against rapid temperature changes or
the vibrations produced from
near-by equipment.
Notable Features:
USED WITH CONFIDENCE:
Its dynamic alignment system is
unique to interferometers, making
it immune to vibration and
ambient temperature changes
that cause degradation of
operation for other systems. This
also acts as a self-alignment in
harsh conditions.
Stable, rugged, industrialized system able
to withstand extreme weather conditions
and temperatures
Built for continuous unmanned operations for
months at a time
Motorized azimuth-elevation mount for
multiple point data collections around facility
Total remote monitoring and control
Monitors up to 50 compounds in real time
Full alarming capability by compound
Pre-programmed software with graphical
interface and display systems
AND THE MOST RUGGED:
IMACC technology is found at major
industrial, petrochemical, and chemical
facilities world-wide and is used by the U.S.
EPA and other research institutions for
emissions and air quality monitoring.
Since every facility is different and has different monitoring
needs, IMACC FTIR Open Path Monitoring System
transmission monitors can be configured in two modes:
monostatic or bistatic.
Monostatic Mode: The monostatic mode of operation has a
telescope at one end of the path and one or several corner cube
arrays at the other end. The monostatic system can monitor one
or several paths sequentially using a single telescope on a
motorized or manual tripod mount, reflecting off one or multiple
passive retro reflecting mirror(s) at the opposite end of the path.
The monastic mode allows for a special configuration for passive
radiance measurements, also known as passive monitoring.
Open Path FTIR on
motorized tripod.
Multiple passive
retro reflecting
mirrors along
facility fence line.
Passive Monitoring looks at a hot source (stack, flare, etc.) with a
single telescope and detects infrared light emitted by the gases
themselves. It can identify and quantify gases using lower detection
limits in part dictated by the temperature of the gases observed.
DETECTION LIMITS:
The IMACC FTIR Open Path Monitoring System is available with a customized
analysis routine tailored to your specific monitoring needs. The detection limits
depend on the target species, the path length used, and the response time required.
Detection limits will improve with longer path length and longer sampling time.
REPRESENTATIVE FTIR DETECTION LIMITS*
SPECIES
OPEN PATH
POINT SAMPLING
300m PATH
(ppb)
(ppmv*m)
32 m cell**
(ppbv)
Ammonia
2.0
.3
9
1, 3 Butadiene
2.0
.3
9
Carbon Tetrachloride
2.0
.2
6
Chloroform
2.0
.2
6
1, 4 Dioxane
2.0
.3
9
Fromaldehyde
5.0
.8
25
Hydrogen Chloride
2.0
.5
13
Hydrogen Cyanide
5.0
.4
13
Isobutylene
4.0
.4
13
Isopropanol
10.0
1.0
31
Methylene Chloride
5.0
.8
25
Nitric Acid
1.0
.2
6.4
Ozone
3.0
.5
16
Phosgene
1.0
.2
6
Silane
1.0
.1
3
Styrene
1.0
.2
6
Trichloroethylene
2.0
.3
9
1, 1, 1 Trichlorethelyne
4.0
1.0
31
.0
.5
16
Vinyl Chloride
*Requires the Mark V cooled detector
** Detection limit may involve water drying of the sample
SOFTWARE PACKAGE:
Passive FTIR
detecting flare
emissions.
Bistatic Mode: The bistatic mode of operation consists of a
transmitter telescope at one end and a receiver telescope at the
other end of the path. It monitors one or two adjacent paths with
lower detection limits than the monostatic system, but initial setup
is more involved, requiring a communication cable (or microwave
link) between the two ends. It is also limited to two paths.
A complete, user-friendly Windows®-based control and display software package is
provided with every instrument. The graphical display packages produce a variety of
plots/displays in real-time including gas concentrations as a function of time, bar
charts of concentrations versus alarm levels, and correlation plots showing the
relationship between various detected compounds. The reporting software allows for
generation of custom tabular reports by the user.
FTIR SPECIFICATIONS:
Stack gas monitoring: continuous emission monitoring in
stacks, vents, or abatement systems.
Detection limits - low ppbv levels depending on target species, path length used, and
response time required
Dynamic range - ppb-levels to high percent
Response time - Typically 10 sec. to 1 min.
Calibration - None required but internal reference cell available
Output - Continuous analog 4-20 mA RS-232, RS 485, or LAN link
Environment - 0°C - +40°C ; 0 - 98% RH
Process control: real time monitoring of industrial processes
or gas streams with continuous feedback and alarm systems.
PHYSICAL SPECIFICATIONS:
FOR A VARIETY OF APPLICATIONS :
Buildings, storage rooms, chemical plants, landfills, mines:
monitoring for worker exposure to emissions or build-up of
gases in closed spaces.
Plant perimeter: open air monitoring over variable paths
around the perimeter of a plant or process area. Allows for
accidental release detection or fugitive emissions detection.
Base unit - 16” (l) x 20” (w) x 9” (h)
Extractive monitoring accessory - 5cm, 10cm, 10m and 32m cells internal to base
unit, all optionally heatable to 185C
Electronics - All versions of interface electronics are internal to base unit
Power - 120/220 VAC; 15 Amps without heated cells
Options - Custom cells, heated extraction lines and cells, laptop computer for systems control
800 Paloma Drive, Suite 150
Round Rock, TX 78665
imacc-instruments.com
Robert Spellicy, Ph.D.
rspellicy@imacc-instruments.com
512-341-8189
Troy Boley, Ph.D.
tboley@imacc-instruments.com
770-883-7082