Resources

Your Chlorine Sensor Is Lying to You — Here's 65 Days of Proof

A compelling data-driven look at how conventional chlorine sensors drift and misreport over time, with 65 days of side-by-side comparative data.

By Halogen Systems Inc.

Technical Guidance Note: DPD and Total Chlorine Calibration

Detailed technical guidance on calibrating total chlorine measurements using DPD reference methods. Covers procedure, tips, and common errors. Version 1.2.

By Halogen Systems Inc.

Simple Guide: DPD and Total Chlorine Calibration

A straightforward field guide for operators performing DPD-based total chlorine calibration. Written for technicians — plain language, step by step. Version 1.0.

By Halogen Systems Inc.

Calibrating Total Chlorine with Free Chlorine

Explains the relationship between total and free chlorine measurements and how to use free chlorine references to calibrate total chlorine sensors accurately.

By Halogen Systems Inc.

Investigating Chlorine Monitoring Options for Water Conservation and Safety

How the City of Lakewood, CA solved its water waste and infrastructure challenges with a new in-pipe chlorine sensor. Published in AWWA Opflow, April 2025.

By Michael Santillan, Derwin Dy, Derek Nguyen & Michael Silveri

AWWA Opflow — April 2025

Less Waste, Easier Maintenance — Why You Need to Look at Amperometric Sensors

A comprehensive comparison of amperometric sensor technologies including membrane, bare electrode, and direct-insertion designs. Covers NSF-61 certification, flow independence, and self-cleaning systems.

By Michael Silveri

Water Environment Technology — March 2022

Streams of Information — A Breakthrough Sensor for Ballast Water Treatment

How Halogen Systems developed cutting-edge TRO sensor technology through a Navy SBIR program, leading to commercial deployment on 1,200+ ships worldwide.

By Office of Naval Research

ONR SBIR Success Story

Florida Utility Saves 2,080 Man-Hours With Just 5 Sensors

How a major Florida utility dramatically reduced labor costs and improved water quality monitoring by deploying five Halogen MP5 sensors across their distribution system.

By Halogen Systems

WaterOnline — March 2026

Your Chlorine Sensor Is Lying to You — Here's 65 Days of Proof

A data-driven investigation showing how conventional chlorine sensors drift and misreport over time, with 65 days of side-by-side comparative data proving the accuracy gap.

By Halogen Systems

WaterOnline — March 2026

Water Quality Data Now Available Through SENSUS AMI Systems From Anywhere

How Halogen Systems integrates with Sensus (Xylem) AMI infrastructure to deliver real-time water quality data alongside meter reads — accessible from anywhere.

By Halogen Systems

WaterOnline — November 2025

Office Of Naval Research Contract Leads To New Chlorine Sensor Technology

The story behind Halogen Systems' origin — how a Navy SBIR contract to solve ballast water treatment led to breakthrough amperometric sensor technology now used in municipal water systems.

By Halogen Systems

WaterOnline — November 2025

Eliminating Chlorine Sensor Pain Points With New Technology

A look at the common frustrations water operators face with traditional chlorine sensors — reagent costs, constant calibration, waste streams — and how new amperometric technology eliminates them.

By Halogen Systems

WaterOnline — November 2025

Sensors Are The Missing Link For Legionella Control In Buildings And Hospitals

Why continuous chlorine monitoring is the critical missing piece in Legionella prevention programs for large buildings, hospitals, and hot water systems.

By Halogen Systems

WaterOnline — November 2025

9 Reasons Why Drinking Water Distribution System Monitoring Is Now Practical

Nine technological and economic factors that have made continuous chlorine monitoring throughout the distribution system practical and affordable for utilities of all sizes.

By Halogen Systems

WaterOnline — October 2025

Demand Based Flushing Using AMI And Water Quality Sensors

How integrating water quality sensors with AMI systems enables utilities to replace calendar-based flushing with data-driven, demand-based programs that save millions of gallons.

By Halogen Systems

WaterOnline — September 2025

Chlorine Sensors Waste An Estimated 6.1 Billion Gallons Of Non-Revenue Water Every Year

The hidden cost of traditional chlorine analyzers: their required waste streams add up to 6.1 billion gallons of non-revenue water annually across the U.S. — and how in-pipe sensors eliminate it entirely.

By Halogen Systems

WaterOnline — July 2025

Water Quality Monitoring for Legionella Control

How new sensor technology makes it practical to monitor water quality throughout a building's hot water system for Legionella prevention.

By David J. Swiderski (HC Info) & Michael Silveri (Halogen Systems)

Measuring Monochloramine Without Reagents

A new control method for chloramination using the MP-TOTAL sensor to measure free chlorine and monochloramine simultaneously without reagents.

By Halogen Systems Inc.

MP5-A: A New Standard in Accuracy

Testing shows the MP5-A maintains ±4% accuracy across wide ranges of pH (6.5–8.5), temperature (10–35°C), and conductivity (156–10,000 µS) — outperforming competing sensors.

By Halogen Systems Inc.

Demand-Based Flushing with AMI & Water Quality Sensors

How the City of Gainesville, GA uses Halogen sensors integrated with Sensus AMI to optimize flushing operations and reduce non-revenue water.

By Halogen Systems Inc. & Sensus (Xylem)

Chlorine Analyzers Waste 6.1 Billion Gallons of Non-Revenue Water

Traditional sensors require a 70,000-gallon waste stream per year. The MP5 eliminates this entirely with direct in-pipe installation.

By Halogen Systems Inc.

ORP versus Amperometry for Chlorine Measurement

A technical comparison of ORP and amperometric methods for TRO measurement. Covers electrode poisoning, ±30% ORP error, logarithmic response limitations, and why amperometry is the correct choice for quantitative control.

By Halogen Systems Inc.

New Alternatives to Online DPD Instruments for TRO Measurement in BWMS

ACT-evaluated amperometric TRO sensor technology for ballast water management systems. Reagent-free, flow-independent, and DNV Type Approved.

By Halogen Systems Inc.