Breen-ADM Probe technology provides direct measurement of the process dew point, removing the guesswork with real-time feedback for control of process gas temperatures.

What is Acid Dew Point?

The traditional acid dew point of a gas is the temperature at a given pressure at which sulfuric acid in the gas phase will condense. The direct measurement of the process gas dew point provides plant and process operations with information that would otherwise be a “multi-variable equilibrium problem that is neither elementary nor precise.”* Breen-ADM Probe technology removes the guesswork and provides real-time feedback for control of process gas temperatures.

*American Petroleum Institute, “Standard 560,” Fired Heaters for General Refinery Services, 5th edition.

Targeted Application

The Breen-ADM Probe is ideally suited for all industrial applications within the operating temperature range. Applications include, Fired Heater-APH inlet and outlet, FCCU-CO boiler SCR outlet and downstream gases, black liquor recovery boilers and other corrosive flue gas applications.

Unlike traditional acid dew point meters, the Breen-ADM Probe measures the dew point of combustion and process gases independent of the condensable species (i.e., dew points of ammonium bisulfate, sodium bisulfate, sulfuric acid, water, etc.) and, hence, would be applicable for a wide variety of corrosion and fouling applications.

Breen Probe Solution

Direct Measurement of Acid Dew Point

The Breen-ADM Probe consists of a probe with a detection tip, and electronic and pneumatic controls for 24/7 operation with a full range of outputs for integration into the plant process control system. The Breen-ADM Probe condensables dew point measurement device measures conductivity across a uniquely constructed probe surface resulting from condensed acid below its dew point. The condensables measurement technique and probe designs are described in United States Patent Nos. 6,677,765, 8,256,267 and other foreign patents.

Breen Typical Measurement Cycle


  • Refining and Petrochemical
  • FCCU – CO Boiler SCR
  • Fired Heater Air Pre-Heater (APH) Protection
  • Cold-End Corrosion and Fouling Protection
  • Visible/Blue Plume
  • Cold-End Corrosion
  • AbS Fouling
  • Pulp and Paper
  • Bark-Fired Boiler and Recovery Boiler Cold-End Corrosion and Fouling
  • RTOs and Biomass
  • Metals and Mining
  • Copper Smelters
  • Weak Acid Production
  • Control of Sulfation Air
  • Power Industry
  • Gas Turbines Combined Cycle
  • HRSG Flue Gas Dew Point
  • Oil-Fired Boilers
  • Control of Magnesium Injection
  • Cold-End Average Temperature Control
  • Coal-Fired Boilers
  • Cold-End Corrosion Control
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The Breen Energy Solutions team can help you remove the guesswork of measuring process gas temperatures.