May 07, 2026 [Storage Terminals Magazine]- Emerson has introduced the new Rosemount 396A Anti-Coating pH Sensor, designed to measure pH and oxidation-reduction potential (ORP) in abrasive, dirty and high-solids industrial applications.

The sensor features an anti-coating reference design and Modbus digital output aimed at reducing maintenance requirements while maintaining stable pH and ORP measurements in environments where coating and fouling are common.

According to Emerson, the Rosemount 396A has been developed for use in challenging process conditions across industries including chemical manufacturing, oil and gas refining, water and wastewater treatment, and pulp and paper production, where sensor reliability can be affected by buildup and contamination.

Rachel Jang, global product manager for liquid analysis at Emerson, said the new sensor combines anti-coating technology with digital connectivity to simplify installation and accelerate sensor replacement in demanding operating environments.

The company said the digital Rosemount 396A is designed as a direct replacement for legacy Rosemount 396P and 396PVP anti-coating sensors, allowing users to upgrade to digital technology without modifying existing installations or accessories.

The sensor incorporates Modbus digital communication to support simplified setup with compatible Rosemount liquid analysis transmitters. Emerson added that calibration data can be stored directly within the sensor, enabling bench calibration and replacement without requiring recalibration in the field, which can help reduce commissioning time and maintenance effort.

The Rosemount 396A is rated IP67 and IP68 for resistance against water and dust ingress, including submerged and washdown conditions. It also features a through-wall reference junction with increased surface area intended to improve performance in fouling applications.

Emerson said the Rosemount 396A sensor is now commercially available.