Rosemount 1056 Dual-Line pH/ORP Transmitter with 4-20mA HART Output

The Rosemount 1056 is a sophisticated, versatile, and highly reliable dual-line pH/ORP transmitter manufactured by Emerson Automation Solutions. Designed for the most demanding industrial water and process applications, this transmitter sets a benchmark for measurement accuracy, operational stability, and user-friendly functionality. Its dual-line capability allows it to support two separate sensors simultaneously, making it an exceptionally efficient solution for monitoring multiple points in a process or for providing redundant measurement in critical applications, all from a single hardware unit.

A cornerstone of the 1056's performance is its exceptional measurement accuracy and stability. It achieves this through advanced signal processing algorithms and high-quality electronics that minimize noise and drift. The transmitter supports a wide range of pH, ORP (Oxidation-Reduction Potential), and ion-selective electrodes, offering unparalleled flexibility. For pH measurements, it provides automatic or manual temperature compensation (ATC/MTC) using an integrated sensor or an external RTD/thermistor, ensuring readings are accurate regardless of process fluid temperature fluctuations. This is critical in applications like chemical processing or effluent monitoring where temperature can vary significantly.

The user interface is a significant highlight of the Rosemount 1056. It features a large, backlit, graphical liquid crystal display (LCD) that can present information in multiple languages. This display can show one or two lines of data simultaneously—such as pH value and temperature, or the readings from two completely separate sensors. Configuration is intuitive and secure, accomplished through a sealed, magnetic touch keypad that prevents unauthorized access and protects against moisture and dust ingress. This robust design is complemented by a housing rated at NEMA 4X (IP66), ensuring reliable operation in harsh, wet, and corrosive environments.

Communication and integration are seamlessly handled through multiple industry-standard protocols. The transmitter typically offers a 4-20 mA analog output with HART protocol for easy integration into existing control systems. Furthermore, it is available with Foundation Fieldbus and Profibus PA digital bus options, enabling powerful device-to-device communication and advanced diagnostics within a fully digital plant architecture. This allows for remote configuration, calibration, and monitoring from the control room, significantly reducing maintenance time and costs.

The 1056 is packed with powerful diagnostics and smart sensor management features. It continuously monitors sensor health, providing alerts for issues such as glass electrode degradation, reference electrode poisoning, or broken sensors. Features like "Plug and Measure" auto-recognition for smart sensors dramatically simplify setup and reduce commissioning errors. Predictive diagnostics inform users of necessary maintenance before a measurement failure occurs, supporting predictive maintenance strategies and minimizing unplanned downtime.

In summary, the Rosemount 1056 is far more than a simple analyzer; it is a comprehensive measurement solution. Its dual-sensor capability provides unique flexibility and cost savings. Combined with its high accuracy, robust construction, intuitive interface, and advanced diagnostic capabilities, the 1056 delivers unparalleled reliability and a low total cost of ownership. It is an ideal choice for a vast array of applications, including wastewater treatment, chemical production, pharmaceutical manufacturing, power generation, and food and beverage processing, where precise and reliable pH/ORP measurement is essential for process control, quality assurance, and regulatory compliance.