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. [email protected] 512-341-8189 Troy Boley, Ph.D. [email protected] 770-883-7082 Matt McCormick, Ph.D. [email protected] 512-341-8189