Xact - Model 625i -Ambient Continuous Multi-Metals Monitor

The system uses reel-to-reel filter tape sampling and nondestructive energy dispersive X-ray fluorescence (EDXRF) analysis. The air is sampled through a low volume (16.7 l/min) particulate matter (PM) size-selective inlet and drawn through a filter tape. The resulting PM deposit is then advanced into the analysis area where the sample is analyzed by EDXRF for selected metals while the next sample is collected.

• ADAPT data analysis software that enables immediate research quality graphical reports to deliver unique insight on the temporal and variability trends of the metals
• Sampling and analysis methodology that has been validated by the US EPA ETV program
• Windows-based operating system with tilted 10.1-inch touchscreen
• Sampling, analysis, and near real-time reporting (every 5, 15, 30, 60, 120, 180, or 240 minutes in ng/m³)
• Automatic quality assurance, alarms, & control features
• Incorporates an internal XRF quality assurance standard with every sample
• Provides automatic, daily XRF calibration drift checks
• Remote polling and remote system control
• Global power design does not require power conversion
• Average detection limits improved by over 30% compared to the previous generation Xact® 625

• Adaptable to both stationary and mobile monitoring platforms
• Effective for fugitive emissions measurement
• Can be used to establish baseline levels for health-based standards
• Capable of identifying hazardous “hot spots” around the perimeter of a facility
• Enables effective source apportionment and chemical mass balance comparisons
• Highly sensitive and reliable (low pg/m3 to μg/m3 range)
• Nondestructive analysis allows for sample archiving
• Aids source identification by correlating metals concentrations to wind speed and direction
• Demonstrates metal concentration variability not observable with standard 24-hour methods
• Can be used to identify plant activities associated with high metals concentrations

• Measurement method: Based on EPA Method IO 3.3: Determination of Metals in Ambient PM Using XRF
• Key applicable elements: Sb, As, Ba, Cd, Ca Cr, Co, Cu, Fe, Pb, Hg, Mn, Ni, Se, Ag, Sn, Ti, Tl, V, Zn, and more available
• Measurement range: Up to 60 μg/dscm
• Detection limits: Metal and sample time dependent; See datasheet performance section
• Sampling and analysis times: Every 5, 15, 30, 60, 120, 180, or 240 minutes, user defined.
• Calibration stability check frequency: Automatically with each sample analyzed
• Estimated recalibration frequency: Annually, when manufacturer’s operating recommendations are followed
• Sample flow rate: 16.7 lpm
• Linearity: Correlation coefficient >0.99
• Size and weight:
• 19” w x 20” d x 30” h, 130 lbs
• 19 inch (483 mm) rack-mountable or tabletop
• Required operating environment: Lab environment with temperature controlled to 20±5°C (68°F)
• Power requirements:
• 120 VAC, 50/60 Hz @ 4 amp or
• 120 VAC, 50/60 Hz @ 20 amp (with small AC Enclosure)
• 220 VAC, 50/60 Hz @ 2.1 amp or
• 220 VAC, 50/60 Hz @ 11 amps (with small AC Enclosure)
• Outputs:
• RS 232 or TCP/IP, Modbus protocol
• CSV (comma-separated value) file
• Reporting of metals, operational parameters, alarms, and warnings
• Options:
• Change or add elements
• Enclosures (NEMA 4, 4x, 12, or 12x)
• Inlets (PM10, PM2.5, PM1, Low Vol TSP, and Inlets for Industrial Hygiene)
• Automatic PM10 and PM2.5 inlets switcher

Xact® 625i monitoring systems are capable of identifying and measuring elements highlighted in the table above. Please contact your Xact® representative for more information on your specific metals monitoring requirements.

The default set of elemental standards can report the ambient concentrations of up to 44 elements, consisting of the following: - Al, Si, P, S, Cl, K, Ca, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Ga, Ge, As, Se, Br, Rb, Sr, Y, Zr, Mo, Pd, Ag, Cd, In, Sn, Sb, Te, Cs, Ba, La, Ce, W, Pt, Au, Hg, Tl, Pb, and Bi. The elements can be tailored specifically to the user’s needs.