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All >> Water analysis >> Digital Non-glass pH Sensor
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Product name:
Digital Non-glass pH Sensor
Product series:

CPS77E

Product brand:
E+H/Endress+Hauser
Product feature:
• Certified for all relevant hygienic applications, such as EHEDG, 3‑A, EU 1935/2004 and USP 87/88. • Memosens 2.0 supports an extended memory unit for storing calibration and process parameters, enabling improved trend identification. It provides an ideal foundation for future predictive maintenance implementation and enhanced IIoT services. • No risk of glass breakage: non‑glass PEEK electrode shaft ensures high product safety and avoids adverse effects caused by glass fracture. • Pharmacopoeia‑compatible and pharma‑compliant electrode (optional Pharma CoC) safeguards product safety. • Resistant to hot steam autoclaving and high‑temperature sterilisation processes for long‑term stable measurement. • Low maintenance effort: ISFET technology is immune to temperature fluctuations, delivers accurate measurement for acids and alkalis, and features long calibration intervals. • Six‑fold higher CIP stability compared with conventional ISFET pH electrodes, offering long service life even under Cleaning‑in‑Place conditions. • Maximum process safety: non‑contact inductive signal transmission renders measurements unaffected by humid environments and corrosive conditions.
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Measuring principle:
The pH‑selective ISFET (Ion‑Sensitive Field‑Effect Transistor) gate insulator acts as the ion‑selective layer for H⁺ ions. The gate insulator allows bidirectional passage of H⁺ ions while blocking other ions (isolation effect). Depending on the acidity and alkalinity of the measured medium, the insulator surface accepts or releases H⁺ ions (amphoteric behaviour). Consequently, the insulator surface becomes positively charged (H⁺ uptake in acidic media) or negatively charged (H⁺ release in alkaline media). The charge quantity on the insulator surface modulates the channel field‑effect between the source and drain according to the pH value. The control voltage between gate and source (UGS) is calculated based on the Nernst equation.
Product positioning:
High-end
Using scenario:
Memosens CPS77E is an electrode dedicated for hygienic applications. The reference lead resists bacterial toxic diffusion and is filled with stable gel electrolyte to ensure reliable measurement results. This non‑glass electrode eliminates glass breakage risk and withstands hot‑steam sterilisation and autoclaving for high product safety. Equipped with Memosens 2.0 digital technology, the CPS77E supports extended data memory to store calibration and process parameters for predictive maintenance. The moisture‑proof electrode allows laboratory sensor calibration, enhances process integrity and reduces production downtime. Typical applications: hygienic and sterilisation processes, food & beverage industry, life sciences, biotechnology.
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