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.