Liquid Analysis

Liquid Analysis

Endress+Hauser’s Liquid Analysis portfolio spans the complete measurement chain required to make water and process‑liquid quality visible, controllable, and compliant, from rugged in‑situ sensors and modular transmitters to wet‑chem analyzers, samplers, and application‑specific assemblies. At its core are measurement families covering pH/ORP, conductivity (contacting and inductive), dissolved oxygen, chlorine and related disinfectants, turbidity and solids content, UV absorption (e.g., SAC254), and nutrients such as ammonium, nitrate, and phosphate. Surrounding these are standardized platforms for installation, data acquisition, and diagnostics so that a plant can build from a single loop to a fleet of measuring points with consistent operation and lifecycle practices. In short: it’s a portfolio designed to help systems designers, plant engineers, and operators reduce risk and operating cost while improving process stability and product and environmental quality. Endress+Hauser describes this offering as a full suite of sensors, transmitters, assemblies, analyzers, and services for liquid analysis across industries and utilities.

A key enabler across the portfolio is Memosens digital sensor technology. Unlike classical analog probes, Memosens converts the measured signal to digital at the sensor head and transfers it inductively (non‑contact) to the cable and transmitter. This galvanically isolated, hermetically sealed coupling makes the connection immune to moisture ingress, corrosion, and salt bridges and eliminates ground loops, a frequent source of drift and downtime in harsh environments. The practical impact for operations is substantial: probes can be calibrated in the lab under controlled conditions, then swapped in the field (“plug & play”) with traceable calibration histories and predictive diagnostics traveling with the sensor. Memosens 2.0 extends these functions to larger data sets and IIoT use cases (e.g., cloud access and asset health dashboards), while maintaining the handling simplicity operators value during routine maintenance.

For measurement integration, Liquiline multiparameter transmitters provide a common platform and user experience from single‑loop panels to complex, multi‑channel skids. A Liquiline device recognizes connected Memosens sensors automatically, loads the correct parameter menus, and supports straightforward commissioning via a consistent HMI. The CM44x family scales from one or two channels up to four (and beyond, depending on model), and modules can be added at any time to expand channels, I/O, relays, or fieldbus interfaces. Critically for mixed parameter stations, the same controller can host pH/ORP, conductivity, oxygen, chlorine, turbidity, sludge level, nitrate, and UV absorption, as well as selected process photometers, reducing cabinet footprint and spare‑part variety. Heartbeat Technology within the platform adds continuous self‑diagnostics and guided verification to document measurement integrity without process interruption, supporting both quality management and regulatory audits.

When processes require wet‑chemistry for compliance and optimization, Liquiline System CA80‑series analyzers deliver online measurement of nutrients and “sum parameters.” Typical variants include orthophosphate for chemical dosing control, ammonium and nitrate for biological treatment optimization, and total nitrogen for permit reporting or load‑based control strategies. The analyzers share the Liquiline platform’s service concept: automatic calibration and cleaning routines, low reagent consumption to curb operating cost, and remote diagnostics to reduce unplanned visits. Importantly, a CA80 can be extended with up to four additional Memosens sensors, turning an analyzer cabinet into a compact, multiparameter station that correlates chemical concentrations with key field parameters (e.g., pH, DO, conductivity) for better cause‑and‑effect understanding. For plant engineers, this means fewer boxes, fewer drawings, and one common spare‑parts and training model; for operators, it means a familiar UI and clear maintenance prompts.

Sampling, whether for regulatory compliance, process incident investigations, or laboratory corroboration of online readings, is covered by Liquistation (stationary) and Liquiport (portable) samplers. These systems support time‑, flow‑, and event‑based sampling routines and are designed to preserve sample integrity with controlled storage and standards‑compliant workflows. In monitoring networks and plant headworks, a Liquistation can be configured to trigger on setpoints (e.g., turbidity or pH excursions) and, when desired, upgraded by adding Memosens sensors directly into the sampler cabinet. This collapses what is often a sprawl of boxes into one robust enclosure and simplifies power and communications. For field campaigns, the two‑piece Liquiport design and optional battery power facilitate safe transport and operation in remote locations. Together, these devices enable defensible sampling programs that integrate seamlessly with continuous measurements, improving traceability from the process to the lab bench.

Robust measurement begins with correct installation, and Endress+Hauser’s assemblies and holders translate instrument capability into process‑reliable data. Flowfit CYA27 creates a controlled bypass for multi‑parameter measurements, chlorine and other disinfectants, pH/ORP, conductivity, and dissolved oxygen, with built‑in flow monitoring to ensure the sensor is in spec and to protect against dry‑run or fouling effects. In open basins, channels, and tanks, Flexdip immersion systems and modular holders allow fixed, chain, or free‑swinging mounts that can be reconfigured as needs evolve. Where access is limited or the medium is abrasive, fibrous, or scaling, Cleanfit retractable assemblies let you insert, retract, clean, and even calibrate sensors under process pressure, reliably isolating the process with integrated valves and seals, so maintenance no longer forces a shutdown. Hygienic, fully sterilizable variants serve life sciences and food plants, while heavy‑duty versions address chemical, oil & gas, and wastewater service.

For high‑purity and thermal‑cycle applications, engineered solutions like the SWAS (Steam and Water Analysis System) Compact panel combine proven sensors, optimized sample conditioning, and space‑efficient hydraulics to continuously monitor conductivity (including cation conductivity), pH, and dissolved oxygen at low sample flow. The purpose is to detect ingress or chemistry upsets early, before they translate into turbine, boiler, or heat‑exchanger damage, while lowering utilities consumption and sample‑panel footprint. The standardized panel approach speeds specification, installation, and qualification and brings the same Liquiline HMI and Memosens service model to utility water that operators experience elsewhere in the plant. This is representative of how the Liquid Analysis portfolio packages the building blocks into application‑ready systems that shorten project schedules and simplify lifecycle support.

What this means in practice is a set of measurable gains across industries. In municipal and industrial wastewater treatment, online pH/ORP and conductivity stabilize neutralization and sludge dewatering; optical DO accelerates aeration control response, wringing energy out of blowers without compromising biology; orthophosphate and ammonium analyzers make chemical dosing and nitrification/denitrification control predictable and auditable; turbidity and SAC254 support filter performance and early organics detection. In drinking and process water, free‑chlorine or chlorine‑dioxide measurement under controlled flow extends disinfection assurance into remote zones of distribution systems or recycle loops. In food & beverage, hygienic pH and conductivity support CIP validation and phase separation; low‑oxygen monitoring protects flavor and shelf life; retractable assemblies reduce intervention time on viscous, sticky, or abrasive products. Power and life‑science utilities use SWAS‑style panels to safeguard assets and batch quality. Mining, pulp & paper, and chemicals leverage rugged installations and retractable hardware to maintain uptime in abrasive or fouling media. Across these scenarios, the common Liquiline/Memosens backbone reduces training load, simplifies spare‑parts stocking, and improves data consistency for historians, DCS/PLC, and cloud analytics.

Designing with this portfolio is straightforward: specify the parameter and operating range, choose the appropriate Memosens sensor family and body material, pair it with a Liquiline transmitter sized to the channel count and I/O strategy, and select an assembly matched to the hydraulics (bypass, immersion, or retractable) and sanitary or hazardous‑area requirements. Add a CA80‑series analyzer where chemistry is the control variable or a sampler where physical evidence is required. From there, standardize around lab calibration of spare probes, use Heartbeat verification to extend maintenance intervals with documented proof‑tests, and exploit modularity to add sensors as needs evolve (e.g., correlating DO with ammonium load, or pH with orthophosphate). The result is fewer custom one‑offs, faster operator onboarding, clearer maintenance prompts, and a measurement fleet that scales from a single skid to a plantwide network under a unified operating model, precisely the terrain where Endress+Hauser’s Liquid Analysis offering is engineered to excel.

Vector, your Authorized Endress+Hauser Representative