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Boldly going where no sensor has gone before!

Reliable wastewater quality monitoring

Whether you're a municipal WWTP manager battling variable influent or an anaerobic digester operator trying to get the most out of your plant, our one-of-a-kind bio-electrode, real-time BOD and biomass health sensors uniquely provide the early-on, always-on biological process insights that can help you optimize treatment and outputs while saving money and energy along the way.

Just ask the hundreds of facilities and operators already using our sensors today!

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  • Real-time Biological Oxygen Demand (BOD)

  • Real-time Volatile Fatty Acid (VFA)

  • Wastewater toxicity detection and alerts

Explore our products.

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Reliable Wastewater Quality Monitoring

Identify the source of your wastewater variability. Monitor industrial users at effluent and in the wastewater collection network that are negatively impacting downstream treatment.

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Influent BOD

Monitoring

Protect your entire biological treatment process from organic overloading or wastewater toxicity events. 

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Digester Health Monitoring

Real-time VFA monitoring allows you to closely monitor your AD performance to optimize variable feed loads or maximize organic loading.

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Biological Process Monitoring

Provides reliable, rbCOD or VFA from your anaerobic selector BNR or your optimized biological treatment process

The industry's only continuous, real-time influent BOD monitoring solution

SENTRY™ is a robust reliable real-time system that supports feed-forward monitoring for wastewater with a clear set of actions that can be taken to protect your treatment works and optimize processes like aeration and anaerobic digestion.

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SENTRY Sensors Installed Today

400+

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Operators Benefiting from SENTRY’s Data

650+

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Average # of Daily
Problem Events Detected

27

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Average Monthly Cost for a SENTRY System

~$1K

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Average Annual Savings Using SENTRY

$75k+

"It's like the biomass is talking to you, giving information and ideas to improve your knowledge and process management"
Roberto DiCosmo, Technical Process Engineer, Gruppo Cap

WWTP Pretreatment Case Study

2025-10

SENTRY real-time BOD monitoring plus event-based auto sampling helps this WWTP’s pretreatment team detect upset events in real time and identify problematic industrial discharge sources

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Environmental Science & Engineering Magazine

2025-10

Read about how our real-time influent monitoring helped one of the largest sanitation companies in the world improve and stabilize effluent quality and cut costs.

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SENTRY & C.E.C. Innovations

2025-09

Helping Municipal Water Utility Improve Influent Monitoring & Identify Problematic Industrial Discharge Sources

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1H 2025 SENTRY Snapshot

2025-07

Continued growth in the first half of 2025, notable purchase orders, and critical customer renewals in our latest newsletter edition.

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Ready to measure & optimize your plant's biological activity for less than $40 a day?
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Our robust bio-electrode sensors go where no sensor has gone before helping municipalities, industry, and agriculture gain early-on, always-on insights into biological processes that exist wherever water is used, stored, or treated. Get the data you need to make smarter water and wastewater treatment decisions.

Follow Us on:

(+1) 902-894-1366

Headquarters:

65 Watts Avenue, Charlottetown, PE

C1E 2B7 , CANADA 

U.S. Patent 11,352,272

U.S. Patent 11,845,680

U.S. Patent 12,077,458

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© 2026. SENTRY™ Water Technologies Inc.

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