pH Sensor Integrates Multiple Measuring Elements

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Yokogawa introduces the new SC25V 12-mm pH sensor, which uses a VP type connector to integrate multiple measuring elements in a single package, including a built-in temperature sensor and liquid earth. Two versions of the sensor are available, both with a pH range from zero to 14 pH and designed for pressures up to 10 bar. 

Suited for moderate applications, the general-purpose version has an operating temperature range from 10 degrees below zero to 80 degrees Celsius, while the high-temperature/alkaline version is designed for harsher applications, and has a temperature range from 15 degrees to 130 degrees Celsius. It also incorporates a special chemical resistant glass to prolong its life in alkaline applications.

Both types include a PT1000 temperature sensor integrated into the pH compartment for more accurate temperature compensation, along with a silver/silver chloride reference system located close to the pH measuring glass for more accurate measurements during temperature fluctuations. The titanium liquid earth has a large surface with no polarization and a low risk of pollution. Thick glass makes the bulb suitable for heavy duty purposes and allows CIP and steam cleaning.

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