pH Sensors & Transmitters

pH Sensors & Transmitters

pH sensors and transmitters provide continuous measurement of hydrogen ion activity, enabling control of reactions, solubility, corrosion potential, and biological performance. The category is positioned for high-quality pH measurement across industries, reflecting the central role of pH in neutralization, precipitation, disinfection efficiency, and product quality. Because pH can change rapidly and nonlinearly, stable measurement and reliable installation practices are critical to avoid control oscillation and chemical overfeed.

The portfolio includes both pH sensors and transmitters, supporting a range of measurement principles including traditional pH glass and glass-free approaches. Sensor selection is typically paired with appropriate assemblies (immersion, flow-through, insertion) to ensure representative measurement, stable flow conditions, and service access for cleaning. Product families include Memosens and Liquiline offerings, enabling digital sensor handling, standardized transmitter platforms, and broad compatibility with industrial communications and asset-management approaches.

Benefits include tighter chemical dosing control, improved equipment protection, and more consistent product and effluent quality. In water and wastewater, pH is foundational for coagulation, precipitation, disinfection, and biological process stability. In industrial processes, pH measurement supports reaction endpoint control, CIP verification, and corrosion management. Continuous pH trending also supports early detection of process upsets, chemical feed interruptions, or unexpected influent changes that can compromise downstream treatment or product quality.

Common applications include wastewater neutralization systems, industrial pretreatment, and chemical process reactors. pH is also heavily used in mining and minerals processing, pulp and paper operations, and water utilities for corrosion control and treatment optimization. In food and beverage and life sciences, pH measurement supports consistency and hygienic process validation, often in combination with conductivity and temperature signals for multi-parameter control strategies.

Implementation considerations include matching sensor construction to process conditions (temperature, solids, abrasiveness, chemical compatibility) and designing for reliable cleaning and calibration access. Reference junction selection and installation geometry influence long-term stability in challenging matrices. Transmitter selection centers on diagnostics, multi-channel capability where needed, and integration outputs (analog and/or digital protocols) to support consistent control, alarming, and maintenance practices across an installed base.

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