The SE 558 Memosens pH Sensor is specifically engineered for high-purity water applications, particularly where conductivity exceeds 10 μS/cm. Designed for low-maintenance operation, it offers a reliable alternative to traditional, high-maintenance liquid-filled pH sensors.
SE 558 - pH Sensor for Low Conductivity Liquids
Constructed with Alpha pH glass, three ceramic junctions, and a KCl reservoir, the SE 558 ensures stable and accurate measurements. An integrated NTC 30K temperature sensor provides precise temperature compensation for process media, enhancing measurement accuracy.
The integration of Memosens digital technology—combined with reduced maintenance demands—significantly lowers the total cost of ownership. The SE 558 is fully compatible with all Knick M4 transmitters, making it a flexible and efficient choice for demanding applications.
The SE 558 is suitable for use with any M4 Knick transmitter.
QUICK SPECS Range: 0 … 14 pH |
TYPICAL APPLICATIONS
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SE 558 pH Sensor Anatomy
1 – SENSOR HEAD: Memosens Digital Sensing Technology Memosens sensors offer significant advantages in terms of usability and operational cost savings:
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2 – ELECTROLYTE:
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3 – REFERENCE ELECTRODE: Ag/Ag Cl – Silamid® The Silamid reference electrode features a glass tube internally coated with silver and filled with silver chloride powder. A polyester fiber plug serves as an added barrier to protect against contamination, thereby enhancing sensor longevity. |
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4 – DIAPHRAGM/JUNCTION: 3X Ceramic Designed for durability and corrosion resistance, the sensor features a dense ceramic junction that enables the reference system to be pressurized. This pressurization significantly reduces fouling and poisoning, extending calibration intervals and minimizing sensor replacement. Additionally, the use of three ceramic junctions eliminates flow-related measurement interference and ensures a stable, reliable connection between the reference electrode and the process medium. |
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5 – SENSOR MATERIAL: Alpha pH glass Alpha glass is a medium-impedance, fluoride-resistant, and hydrogen-sensitive formulation engineered for demanding applications. It delivers rapid response times, even in low-temperature conditions and ultra-low ionic strength environments with conductivities above 10 μS/cm. |