Cooper Environmental Services

- Model Xact® 920 - Multi-Metals Continuous Water Analyzer



The Xact® 920 system is the latest application of Cooper Environmental’s automated XRF module that allows for analysis of continuously-drawn aqueous samples for user-selected metals.

A measured amount of unknown sample is blended with a known amount of internal standard which is continuously nebulized, evaporated, and collected onto the filter tape. The liquid sample is aerosolized facilitating the removal of water and allowed metal salts to be concentrated on the filter tape. This method of pre-concentration allows detection limits in the low parts per billion (ppb) ranges for elements ranging from potassium to uranium.

The concentrated deposit is automatically advanced and analyzed by XRF for selected metals as the subsequent sample is collected. Sampling and analysis are performed continuously and simultaneously, except during the advancement of the tape (~20 sec) and during daily-automated quality assurance checks.

  • Sampling, analysis, and near-real time reporting (every 15, 30, 60, 120,
  • 180, or 240 minutes in ppb)
  • Automatic quality assurance, alarms, and control features
  • Proven XRF and RTR technology
  • Identification and measurement of 24 elements simultaneously
  • Incorporates an XRF stability check with every sample analyzed
  • Provides an automatic daily upscale and QA check

  • Highly sensitive and reliable (low ppb to ppm range)
  • Nondestructive analysis allows for sample archiving
  • Low maintenance cost
  • Extremely stable, requiring only automated calibration checks
  • Analytical recalibration frequency generally less than once per year

The Xact 920 monitoring system can simultaneously identify and measure multiple metals in liquid samples to provide data for use in the following applications:

  • Waste water and water treatment plants
  • Industrial and mining influent and effluent
  • Drinking water
  • Food and beverage industry
  • Surface water

  • 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, Mn, Ni, Se, Ag, Sn, Ti, Tl, V, Zn, and more available
  • Measurement range: 1,000ppm of any analyte
  • Detection limits: Depends on specific metal, sampling times, interfering metals, and level of dissolved solids. See performance section.
  • Sampling and analysis times: Every 15, 30, 60, 120, 180, or 240 minutes, depending on the per sample dissolved solids
  • Calibration stability check frequency: Automatically with each sample analyzed
  • Estimated recalibration frequency: Annually, when manufacturer’s operating recommendations are followed
  • Sample flow rate: Application specific
  • Linearity: Correlation coefficient >0.98
  • Size and weight (2 cabinets).:
    • 19”(W) x 24” (D) x 24” (H)
    • 120 lbs
    • 19 inch (483 mm) rack-mountable components
  • Required operating environment: Office environment with temperature controlled to 20±3°C (68°F)
  • Power requirements³:
    • 120 VAC/60 Hz @ 20 amp circuits
    • 220 VAC/60 Hz 10 amp with an optional power converter
  • Outputs:
    • RS232 Modbus signal
    • Selected analytes plus quality control parameters are reported
  • Options:
    • Change or add elements
    • Enclosures (NEMA 4, 4x, 12 or 12x)
    • Remote control
    • Remote polling

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