Analyzers for Hardness, Iron & More

Online metal and “sum-parameter” analyzers are process instruments designed to continuously measure trace constituents that strongly influence water quality, corrosion potential, and treatment performance. Rather than relying solely on grab samples, these systems automate measurement of key parameters such as hardness, iron, aluminum, chromate, sodium, and related indicators that can signal treatment upsets or breakthrough conditions. The result is a real-time picture of water chemistry where small changes matter.

Most solutions in this category combine analyzer hardware, sample handling, and an analytical method matched to the target constituent. Colorimetric measurement is common for many metals and hardness, while potentiometric/ion-selective approaches are used for ions such as sodium. Systems are often packaged as modular platforms (e.g., Liquiline System families) with optional sample preparation to stabilize flow, manage pressure, and condition the sample stream so the measurement remains repeatable over long operating periods.

The operational value comes from preventing small chemistry deviations from becoming costly events. Continuous measurement supports earlier detection of process drift, tighter chemical dosing control, and faster verification after maintenance or resin regeneration. In power and high-purity water service, trending trace constituents helps protect boilers, heat exchangers, turbines, and condensate systems by reducing the risk of scaling, deposition, and corrosion acceleration. In municipal and industrial water, it supports stability, compliance, and consistent finished-water performance.

Typical applications include finished-water monitoring (e.g., residual aluminum or iron), process-water supervision, and industrial wastewater programs where metals such as chromate require careful oversight. In power and steam-cycle chemistry, sodium and silica monitoring are widely used as early indicators of condenser leakage and ion-exchanger performance, helping confirm demineralizer health before excursions reach critical equipment. Hardness monitoring supports softener performance, scaling prevention, and chemical optimization in many utility and industrial water systems.

Successful implementation depends on sample integrity and maintainability as much as measurement principle. Key considerations include sample takeoff location, filtration/conditioning requirements, reagent logistics where applicable, calibration strategy, and service access for routine preventive tasks. Integration typically supports standard analog and digital communications, enabling analyzer results to drive closed-loop control, alarms, and compliance reporting without manual transcription delays.

Field Instruments & Controls, Inc. an exclusive authorized representative of sales and service for Endress+Hauser.