OXYDAN® Exhaust Gas Dilution Probe

Continuous Emission Monitoring made easy

The process relies on several key steps. Initially, a small portion of the stack’s contents is extracted and then subjected to a proprietary filter to eliminate any impurities. Subsequently, this filtered sample is meticulously mixed with clean, dry zero air, effectively lowering the dew point to prevent the formation of condensation in the sample line.

The resulting diluted sample is then pressurized and transported through an unheated sample line to the designated location where gas sensors or analyzers carry out their analysis.

The system’s verification / calibration is executed with meticulous precision by introducing span or zero gas directly into both the stack and the probe. This method guarantees a comprehensive validation of the entire sampling process, spanning from the probe’s tip to the final concentration readings. This meticulous approach results in exceptionally accurate measurement outcomes, distinguishing it from systems that solely verify sensors without considering the integrity of the sampling system.

The dilution probe system operates by utilizing a pressurized source of uncontaminated dry air, commonly referred to as ‘dilution air.’ It relies on an ejector, making the system practically solid-state with no moving parts that require maintenance or frequent repairs.

Once you establish a connection between the instrument air, sourced from a swing absorption dryer, and a power supply to activate the self-regulating heater, the probe will initiate the delivery of a properly diluted sample to your sensors or analyzers.

Features and benefits

  • Unheated Sample Line
  • Zero Velocity filter method
  • Sample is transported at positive pressure, no ingress possible
  • Sample gas virtually as clean as the ambient air
  • No contamination of detectors/sensor optics
  • No moving parts
  • No loss of water-soluble gasses such as SO2, NO2 etc.
  • Fast response time
  • Direct “Wet Basis” Measurement
  • Works with all ambient air / GHG analyzers: such as “ABB OA-ICOS, MIRO/BRUKER MGA1 to MGA10, Picarro CRDS, Thermo Scientific, Teledyne-API, Acoem/Ecotech, Horiba” and even low-cost ambient ECS

Copyright © 2023 Instrumatic EMI A/S | Instrumatic Marine A/S