Flow control valve skid with Endress+Hauser Proline Prowirl F 200 vortex flowmeter and Cerabar PMC71 digital pressure transmitter

The Endress+Hauser Cerabar PMC71 is a high-performance, piezoresistive pressure transmitter designed for continuous level, volume, and pressure measurement of liquids, gases, and steam in a vast array of industrial applications. Renowned for its exceptional reliability, accuracy, and innovative diagnostic capabilities, it stands as a benchmark in the process automation industry for critical measurement points where safety and operational efficiency are paramount.

At the heart of the Cerabar PMC71 lies a state-of-the-art metallic, oil-filled sensor cell, isolated from the process medium by a robust, corrosion-resistant isolating diaphragm. This piezoresistive sensor translates process pressure into a highly accurate electrical signal. A key differentiator for Endress+Hauser is the implementation of its proprietary "Heartbeat Technology" directly within the Cerabar PMC71. This self-monitoring and verification system is a groundbreaking feature that allows the device to perform on-demand or scheduled functional checks without interrupting the process. It can verify the integrity of the entire measuring chain, from the sensor to the electronics, providing unparalleled confidence in the measurement data and enabling predictive maintenance strategies. This drastically reduces downtime and prevents costly process interruptions.

The transmitter is housed in a rugged, cast aluminum alloy enclosure with a high protection rating of up to IP66/IP67, ensuring operational integrity in harsh outdoor or wash-down environments. It is available with a wide range of process connections (flanges, threaded, sanitary), diaphragm materials (316L, Hastelloy C, tantalum, gold), and seal options to handle everything from clean gases to highly corrosive, viscous, or abrasive media. For extreme temperatures, optional remote seals (chemical seals) with capillary lines can be mounted, protecting the transmitter from process heat or cold.

The Cerabar PMC71 delivers outstanding measurement performance with high accuracy, typically up to 0.075% of the calibrated span, ensuring precise control and optimization of processes. Its long-term stability is exceptional, minimizing measurement drift over time and reducing the need for frequent recalibration.

The device boasts a highly intuitive user interface. A large, backlit LCD display is standard, providing clear visualization of the measured value, bargraph, and device status. This display can be rotated 360 degrees for optimal viewing from any angle. Configuration is remarkably simple and can be accomplished via the local pushbuttons, using the infrared interface with a handheld operator (ToF Tool), or remotely via the HART protocol with Endress+Hauser's FieldCare or other asset management software. This flexibility streamlines commissioning and maintenance procedures.

In terms of communication, the PMC71 is incredibly versatile. It supports the ubiquitous 4...20 mA HART analog signal for easy integration into traditional control systems. Furthermore, it is available with all major digital fieldbus protocols, including PROFIBUS PA, Foundation Fieldbus, and MODBUS, making it a perfect fit for modern, fully digital plant architectures. This allows for advanced diagnostics and device parameter data to be communicated directly to the Distributed Control System (DCS).

The versatility of the Cerabar PMC71 makes it suitable for a multitude of demanding applications across various sectors:

• Oil & Gas: Wellhead pressure monitoring, separator level and pressure, filtration and pipeline pressure.
• Chemical & Petrochemical: Reactor and distillation column pressure, level in storage tanks, pump monitoring.
• Power Generation: Steam header pressure, feedwater pressure, level in condensate pots.
• Water & Wastewater: Pump control, filter monitoring, level measurement in open wells or tanks.
• Food & Beverage and Pharmaceuticals: Hygienic applications requiring CIP/SIP cleaning, with approvals like 3-A and EHEDG.

In summary, the Endress+Hauser Cerabar PMC71 offers a compelling package of benefits:

• Unmatched Reliability: Robust construction ensures longevity in harsh conditions.
• Proactive Diagnostics: Integrated Heartbeat Technology enables predictive maintenance and functional safety.
• High Accuracy and Stability: Provides trustworthy data for precise process control and optimization.
• Ease of Use: Intuitive local operation and powerful software tools simplify all lifecycle phases.
• Future-Proof Connectivity: Supports both analog and digital communication protocols.

Ultimately, the Cerabar PMC71 is more than just a pressure transmitter; it is an intelligent field device that enhances process safety, reduces operational costs, and drives efficiency, solidifying Endress+Hauser's position as a leader in process instrumentation.