Xact® 625i Ambient Continuous Multi-Metals Monitor

Xact® 625i Ambient Continuous Multi-Metals Monitor

SCI’s Xact® 625i is designed for high time resolution multi-metals monitoring of ambient air, with detection limits that rival those of laboratory analysis. The Xact® 625i comes standard with a solid-state meteorological sensor and SCI’s proprietary ADAPT analysis package, making the instrument one of the most powerful air pollution source detection offerings in the industry.

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.

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Features

  • 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

Benefits

  • 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

Applications

The Xact® 625i monitoring system can simultaneously identify and measure multiple metals in ambient air to provide data for use in the following applications:

  • Fence-line monitoring
  • Source apportionment
  • Determination of background concentrations
  • Spatial recognition of pollution sources
  • Temporal recognition of pollution sources
  • Resolve acute, short-duration events
  • Continuous measurement of industrial work areas

Technical literature

Specifications

Measurement methodBased on EPA Method IO 3.3: Determination of Metals in Ambient PM Using XRF
Key applicable elementsSb, As, Ba, Cd, Ca Cr, Co, Cu, Fe, Pb, Hg, Mn, Ni, Se, Ag, Sn, Ti, Tl, V, Zn, and more available
Measurement rangeUp to 60 μg/dscm
Detection limitsMetal and sample time dependent; See datasheet performance section
Sampling and analysis timesEvery 5, 15, 30, 60, 120, 180, or 240 minutes, user defined.
Calibration stability check frequencyAutomatically with each sample analyzed
Estimated recalibration frequencyAnnually, when manufacturer’s operating recommendations are followed
Sample flow rate16.7 lpm
LinearityCorrelation coefficient >0.99
Size and weight19” w x 20” d x 30” h, 130 lbs
19 inch (483 mm) rack-mountable or tabletop
Required operating environmentLab environment with temperature controlled to 20±5°C (68°F)
Power requirements120 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)
OutputsRS 232 or TCP/IP, Modbus protocol
CSV (comma-separated value) file
Reporting of metals, operational parameters, alarms, and warnings
OptionsChange 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

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