The Vapex SENTINEL monitors the internal gas passing through the scrubber and sends control signals to regulate chemical pump additions for maximum scrubber efficiency.

• Reduce scrubber chemicals by up to 50%

• Reduce scrubber maintenance & cleaning

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Big savings can come in small packages. That's the case at the Hampton Roads (Va.) Sanitation District (HRSD), where continuous hydrogen sulfide monitoring technology is significantly cutting the use and cost of odor-control chemicals.

"The price of caustic alone has increased by more than 110 percent just in the past year. Based on that, the expenditures for the H2S monitoring units are more than justified, including continued investment in software upgrades and new analyzers."
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The SENTINEL provides a closed-loop control system for optimized (minimum) application of scrubber chemical additions to reduce the emission of corrosive gases in the effluent. This is accomplished by measuring the primary variable of interest for scrubber output and the effluent gas constituents. These measurements are then used to regulate the application of chemicals to the scrubber. The SENTINEL can also connect to existing scrubber sump monitors to ensure that the pH or ORP effect is accounted for in the application of the scrubber control logic.
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