Liquid Analysis

Liquid Analysis

Liquid analysis covers the measurement of analytical parameters that define chemistry and quality in aqueous and process liquids. These measurements underpin environmental protection, consistent product quality, process optimization, and safety, particularly where control decisions depend on chemical state rather than only physical variables. Endress+Hauser positions liquid analysis as a comprehensive product range across parameters and application types, from utilities to in-process measurements.

The Endress+Hauser liquid analysis offering includes pH and ORP sensors/transmitters, conductivity, turbidity, disinfection/chlorine, oxygen, laboratory and portable instruments, automatic water samplers, TOC/COD/SAC analyzers, sludge level sensors, nutrient analyzers, analyzers for hardness/iron and other constituents, process photometers, and microwave transmission measurement. This breadth supports architectures ranging from single-parameter loops to multi-parameter stations with shared transmitter platforms.

A key operational advantage in modern analytical loops is signal integrity and maintainability. Endress+Hauser highlights Memosens as a digital approach that converts the measured value to a digital signal and transfers it to the transmitter without a contacting connection, supporting more resilient measurement and maintenance workflows in demanding environments. In addition, the portfolio emphasizes integration into communication interfaces and plant asset management, and end-to-end lifecycle support.

Typical applications include drinking-water treatment and distribution, wastewater aeration control and nutrient removal, neutralization and effluent compliance monitoring, boiler and cooling-water chemistry, beverage and dairy quality control, and chemical and pharmaceutical process monitoring. Samplers and analyzers support regulatory reporting and troubleshooting, while inline sensors support closed-loop control, alarm management, and process optimization with faster feedback than lab-only approaches.

Engineering considerations include sample representativeness (inline vs. bypass), sensor mounting (fixed or retractable assemblies), cleaning and calibration routines, temperature compensation, and drift detection. Analyzer selection should match the required detection limits, interferences, and response time, with communication and documentation practices aligned to auditability needs. Reliability is typically maximized when sensor handling, spare strategy, and verification intervals are defined alongside the control philosophy rather than after startup.

Instrumentation and Controls., an exclusive authorized representative of sales and service for Endress+Hauser.