In today's rapidly evolving industrial landscape, precise control of process parameters serves as the cornerstone for ensuring product quality, optimizing workflows, enhancing operational efficiency, and maintaining environmental compliance. Among these critical parameters, pH and oxidation-reduction potential (ORP) measurements directly influence various aspects of production. However, traditional pH/ORP measurement devices have long presented challenges in operational complexity, maintenance difficulty, data transmission efficiency, and field adaptability—issues that increase operational costs and potentially create production bottlenecks or safety risks.

Endress+Hauser, a global leader in measurement, automation, and services, has introduced its groundbreaking pH/ORP smart transmitter—the Liquisys CPM253 series—designed to transform measurement experiences and inject unprecedented intelligence into industrial processes.

The Liquisys CPM253 series represents a four-wire pH/ORP smart transmitter engineered for demanding industrial applications. More than a signal conversion device, it integrates advanced diagnostics, intelligent control, and efficient communication capabilities, serving as a core decision-making unit within existing automation systems.

Its exceptional compatibility allows seamless integration with all analog and digital Memosens® sensors worldwide, ensuring optimal connectivity, data stability, and transmission efficiency. This design protects existing sensor investments while providing future upgrade flexibility.

The industrial-grade construction features a compact yet rugged housing (247x170x115mm) with IP65 protection, enabling reliable operation in corrosive chemical environments, hygienic food processing facilities, energy production plants, complex water treatment systems, and high-temperature metal processing applications.

The CPM253 incorporates an advanced continuous monitoring system that tracks sensor status, measurement stability, and transmitter performance in real time. Its programmable alarm function enables customized threshold settings for pH/ORP anomalies or sensor failures, triggering immediate alerts through visual/audible indicators or digital outputs to central control systems.

The Memosens® interface ensures reliable digital signal transmission, eliminating analog signal degradation in harsh environments.

The transmitter's diagnostic system continuously evaluates glass and reference electrode conditions—monitoring response time, zero-point drift, internal resistance, and electrolyte status. Predictive maintenance alerts help prevent unplanned downtime by identifying performance degradation before measurement accuracy is compromised.

Featuring an intuitive LCD display with six-language support, the CPM253 reduces operational complexity. When paired with pre-calibrated Memosens® sensors, it enables true plug-and-play functionality—automatically loading calibration data upon sensor replacement. Manual contact controls allow key functions (calibration initiation, alarm viewing) without opening the housing.

The integrated Chemoclean automatic cleaning system activates via alarms, limit switches, or scheduled intervals to remove sensor surface contaminants. This innovation extends sensor lifespan while minimizing manual maintenance interventions.

The modular design supports optional PID controllers and timers for diverse process requirements—from basic measurement to closed-loop pH control and sequential operations.

• Memosens® Digital Sensor Series: Optimized for digital sensors in precision applications (fine chemicals, pharmaceuticals, ultrapure water)
• Glass Electrode Series: Cost-effective solutions for general industrial processes and water treatment
• ORP Measurement Series: Specialized for oxidation-reduction potential monitoring in chemical reactions and disinfection
• Multifunctional Memosens® Series: Flexible configurations for complex industrial processes
• Integrated Interface Series: Simplified installation with dedicated sensor connections

All CPM253 models feature 0/4-20mA analog outputs with HART, PROFIBUS DP/PA support; multilingual displays; one-touch calibration; and configurable alarm relays.

The CPM253 series delivers measurable improvements in measurement accuracy, production efficiency, operational costs, process safety, and environmental compliance—positioning it as a strategic asset for Industry 4.0 implementation and sustainable manufacturing.