Spec Sheet - IMACC UVDOAS Monitoring Systems_V3

S PEC SHEET
IMACC UV-DOAS Monitoring Systems
IMACC Ultraviolet Differential Optical Absorption Spectroscopy
(UV-DOAS) Monitoring Systems deliver real-time measurements of
dozens of different gases including diatomics, organics, inorganics,
acids, and volatile organic compounds for open path, stack, and
process applications.
DESCRIPTION AND PRINCIPLE
OF OPERATION:
IMACC UV-DOAS Monitoring
Systems propagate an ultraviolet
beam through the open air, or
through a cell in the instrument,
and measure the absorption of
the light by any molecules
present. It can identify
compounds that are undetectable
or hard to measure using other
monitoring techniques. Its
detection limits can reach low
ppb-levels. The high spectral
resolution of the IMACC
instrument allows for
differentiation of compounds with
overlapping spectral features,
providing more accurate results.
THE MOST CUSTOMIZABLE AND
AFFORDABLE EQUIPMENT IN THE
BUSINESS:
IMACC UV-DOAS Monitoring Systems employ a
compact, modular design. Fiber optic coupling of
the spectrometer to the data collection instrument
allows the spectrometer to be near the computer
rather than out in the elements.
AND THE MOST RUGGED:
IMACC’s UV-DOAS Monitoring Systems
have no moving parts, so they can maintain
optimum alignment in the harshest
environments with ease, unaffected by rapid
temperature changes or the vibrations
produced from near-by equipment.
USED WITH TRUST:
Notable Features:
Simple, fully automatic operation
Monitors up to 20 compounds in real time
Full alarming capability by compound
Preprogrammed software with graphical
interface and display systems
Total remote access
IMACC IR/UV 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.
FOR A VARIETY OF APPLICATIONS :
DETECTION LIMITS:
Stack gas monitoring: continuous emissions
monitoring in stacks, vents, or abatement systems.
IMACC UV-DOAS Monitoring Systems are supplied with a customized analysis
routine tailored to specific monitoring needs. The detection limits vary by target
species, the path length used, and the response time required for detection.
Detection limits will improve with longer path length and longer sampling time.
Process control: Real time monitoring of industrial
processes or gas streams with continuous feedback
and alarm systems.
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. This allows for
accidental release detection or fugitive emissions
detection.
OFFERINGS:
The UV-DOAS Open Path Monitoring System uses a
6” optical telescope to transmit the ultraviolet beam
through the air, monitoring the compounds present in
the air mass. The bistatic design with a transmitting
and receiving telescope at each end allows for high
energy throughput, low compound detection limits,
and long path capability.
The transmitting optical
telescope for open path
monitoring.
CALCULATED UV-DOAS DETECTION LIMITS
SPECIES
DETECTION LIMIT
20m cell (ppbv)
0.37
18.6
1.2
< 0.01
1.9
0.1
1,2,4 Trimethylbenzene
1, 3 Butadiene
0.62
31.0
2.1
Acetone
7.45
372.3
24.8
Ammonia
0.04
18.6
1.2
Benzene
0.15
7.4
0.5
Carbon Disulfide
3.72
186.2
12.4
Chlorine
1.49
74.5
5.0
< 0.01
1.9
0.1
Ethylbenzene
0.62
31.0
2.1
Fluorine
16.19
809.4
54.0
Formaldehyde
3.72
186.2
12.4
m-Xylene
0.37
18.6
1.2
Naphthalene
1.86
93.1
6.2
NO
3.72
186.2
12.4
NO2
0.53
26.6
1.8
o-Xylene
0.74
37.2
2.5
Ozone
0.03
1.6
0.1
Phenol
< 0.01
1.9
0.1
0.19
9.3
0.6
Chlorine Dioxide
SO2
5cm to 10cm cells for %-levels
1m to 10m cell for ppm to mid-ppb levels
4m to 32m cell for low ppb levels
18.6
1.2
< 0.01
0.4
0.03
Toluene
0.37
18.6
1.2
SOFTWARE PACKAGE:
A complete, user-friendly, Windows®-based control and display software package is provided
with every instrument. Graphical displays include 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.
Detection limits - low ppbv levels depending on path and response time required
Dynamic range - ppb-levels to percentages
Spectral Resolution - As low as 0.25 nm
Response time - Typically 1 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
Open Path Unit with
fiber-coupled
spectrometer.
imacc-instruments.com
0.37
Styrene
UV-DOAS SPECIFICATIONS:
The cell and its feed lines can be heated so all
measurements are made on a hot/wet basis.
800 Paloma Drive, Suite 150
Round Rock, TX 78665
300m open path
(ppbv)
1,3,5 Trimethylbenzene
p-Xylene
The UV-DOAS Extractive Monitoring System
provides a closed cell configuration used to detect
gaseous chemical compounds that are pulled from
the air and pumped into the cell for analysis. The
concentration range is dictated by the cell used, with
various sizes available:
SAMPLE DETECTION LIMITS
(ppm*m)
PHYSICAL SPECIFICATIONS:
Extractive Cell unit - 24” (l) x 20” (w) x 8” (h)
Open path monitoring - 6” dual telescopes at opposite ends of path, each 16” (l) x 7”
(w) x 12” (h)
Fiber-coupled spectrometer - 5.5” (w) x 11.5” (l)
Electronics - All versions of interface electronics are internal to unit
Power - 120/220 VAC; 2.5 Amps without heated cells
Options - Custom cells, heated extraction lines and cells, laptop computer for systems control
Robert Spellicy, Ph.D.
rspellicy@imacc-instruments.com
512-341-8189
Troy Boley, Ph.D.
tboley@imacc-instruments.com
770-883-7082
Matt McCormick, Ph.D.
mmccormick@imacc-instruments.com
512-341-8189