Colour-coded sensors simplify pH measurement

A new range of color-coded sensors aims to facilitate the selection and management of optimal pH measurement solutions.

The application driven designs are categorised into three groups, namely:

• The entry-level 100 series for cost-effective measurement in general process applications
• The high-performance 500 series for harsh industrial applications
• The 700 series for specialist applications.

This categorisation aims to help users to select, own and operate the pH sensors best suited to their needs. 

Digital and analogue options are available, with the digital solution offering the greatest benefits, with its advanced in-built diagnostics, which is seen as the most effective way of ensuring constant high-quality water. 

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 technology enables faster installation and commissioning and provides easy access to maintenance data. This helps users to replace sensors at the optimum time, with the aim of saving money without risking process control.

Designed for long life to maximize process uptime, the range incorporates 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 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 improved accuracy during calibration and in-process control applications.

To ensure accuracy and reliability in even the harshest of processes, the new sensors are offered with the company’s 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 also offered for a range of aqueous media.