Water Quality Monitoring Knowledge Hub

How the DPD colorimetric method works, what to look for in reagent dosing stability (multi-roller pumps, rigid housings), why lack-of-reagent and lack-of-sample diagnostics matter — and how to choose an online DPD chlorine analyzer.

Electrode-based chlorine measurement avoids reagents but the methods differ widely in stability and maintenance. A practical comparison of three-electrode constant-voltage, galvanic cell and polarographic approaches.

Optical (luminescent) dissolved oxygen sensors have no membranes or electrolyte to replace, consume no oxygen and tolerate sulfide interference. This guide compares both technologies across accuracy, maintenance and lifecycle cost.

Precise denitrification control depends on real-time nitrate data. How UV and full-spectrum methods outperform chemical and electrode approaches in response speed, stability and zero-reagent operation.

UV254 absorption delivers reagent-free COD results in one second; chemical digestion methods provide regulatory-grade accuracy. This guide explains where each approach fits.

Why blanket level data fails as a control input without quality flags — and how machine-learning ultrasonic analyzers enable stable CASS operation and truly automatic sludge discharge.

From raw water at thousands of NTU to filtered water below 0.1 NTU — how to match measurement method, range and installation to your turbidity application.

A structured overview of the parameters that matter at each stage of the treatment train — from influent loading to effluent compliance — and what each one tells you.

With smart monitoring penetration below 15% in drainage networks, subsurface IoT terminals with local storage, two-year battery life and OTA upgrades are changing what is monitorable.

Why pH electrodes drift, how temperature compensation really works, and what ORP actually tells you about biological process zones — a field guide to getting reliable electrochemical data.

Conductivity is the raw signal; TDS and salinity are conversions built on it. How cell constants, temperature compensation and conversion factors affect what your instrument reports.

Cyanobacteria blooms can move from invisible to critical in days. How in-situ fluorescence sensors for chlorophyll-a and phycocyanin give water utilities the earliest possible warning.

NTU and mg/L answer different questions — turbidity tracks fine particles and filtration performance, suspended solids tracks sludge mass. A practical guide to choosing the right measurement.

ISE ammonia measurement eliminates reagents and cycle times of wet-chemistry analyzers. How the method works, where it fits, and how to manage interference in real wastewater.

Aeration typically accounts for over half of a treatment plant’s energy bill. How stable, maintenance-free DO measurement enables closed-loop blower control and measurable energy savings.

Pump rooms and storage tanks are where drinking water quality is won or lost. Which parameters to monitor, where to install, and how multi-parameter analyzers simplify unattended sites.