Cooper Environmental Services

- Model Xact 645 - Continuous Mercury Monitor (CEMs)



Cooper Environmental’s Xact® 645 continuous mercury (Hg) monitor collects and analyzes emission samples for mercury, which can be measured simultaneously using patented reactive filter technology and nondestructive X-ray fluorescence (XRF). A sample of gas is extracted from a source, diluted, and drawn through a chemically reactive filter tape. Vapor phase mercury is deposited along with particulate-phase metals on the filter tape. The deposit is automatically advanced and analyzed by XRF for metals by a proven reel-to-reel tape drive, as the next sample is being collected. Sampling and analysis are performed continuously and simultaneously, except during advancement of the tape (~20 sec) and during daily automated quality assurance checks.

  • Can be upgraded to measure additional elements (such as Pb, As, Cr) without extra hardware
  • Maintenance is required only once per month
  • May be used to meet 40 CFR Part 60 and 63 regulations
  • Nondestructive analysis allows for sample archiving
  • Sensitive and reliable (ng/m3 to mg/m3 range)
  • Proven XRF technology which has been demonstrated on the ocean floor and Mars

  • Continuous, near-real-time reporting (every 15, 30, 60 or 120 minutes, in μg/dscm)
  • Incorporates an internal standard with every sample analyzed
  • Provides automatic daily upscale, blank, and flow checks
  • Relative accuracy of 3.45%
  • RATA linearity regression R² of 0.9754
  • Automatic quality assurance alarms, and control features

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