ABB’s new line of pH sensors includes EZLink plug-and-play technology that can link any of the sensors to an ABB digital transmitter. Innovations include advanced electrode monitoring and diagnostics.

ABB has launched a new range of color-coded sensors that are designed to make it more convenient to choose and manage an optimal pH measurement solution, according to the company. The application-driven designs are categorized into three groups: the entry-level 100 series for cost-effective measurement in general process applications; the high-performance 500 series for harsh industrial applications; and the 700 series for specialist applications. 

Digital and analog options are available, with the digital solution offering advanced in-built diagnostics. ABB’s EZLink plug-and-play technology links any of the new sensors to ABB’s digital transmitter range, including the recently launched AWT420. The company said EZLink enables faster installation and commissioning and provides easy access to maintenance data, allowing users to replace sensors at the optimum time and cut costs without risking process control.

The new range incorporates several innovations including ABB’s perpetual impedance diagnostics to detect electrode faults without the need for a solution earth. Another feature is the smart Reference Electrode Monitoring (REM) system, which provides early warning of electrode poisoning. Optimal temperature compensation is assured by locating the pH electrode, reference electrode, and inbuilt temperature sensor together at the electrode tip. This provides a faster temperature response and better accuracy during calibration and in-process control applications, according to ABB.

The sensors are available with ABB’s bespoke range of sensor glasses, specifically designed to meet requirements such as high pH levels, low or high temperatures, or the need for high acid resistance. General-purpose glass is offered for a range of aqueous media.