Endress+Hauser Cerabar PMP71B Pressure Transmitter
The Cerabar PMP71B is a high-performance pressure transmitter from Endress+Hauser’s new Cerabar generation, designed for demanding pressure and level measurement in liquids and gases across the process industry . It features a robust metallic process isolating diaphragm and is available with diaphragm seal options to handle extreme process temperatures .
Core Technology & Operation
The PMP71B represents a significant evolution in pressure measurement, combining robust hardware with intelligent software. Its core strengths lie in simplifying handling and enabling condition-based maintenance . The device is equipped with intuitive, wizard-driven software that guides users through commissioning, proof testing, and verification, minimizing operating errors and reducing systematic failures .
A key differentiator is the optional Bluetooth® connectivity, which allows secure, remote operation and control via the SmartBlue App on a mobile device—even from the process area . The large display with backlight guarantees excellent readability, and it changes from green to red when diagnostic messages occur for simple device status indication .
Heartbeat Technology & Advanced Diagnostics
The PMP71B offers Heartbeat Technology as an option, providing on-demand verification and continuous monitoring functions to detect unwanted process anomalies—such as dynamic pressure shocks or changes in loop characteristics—without interrupting the process . This enables plant operators to verify the health of the device while running, supports error-free SIL commissioning, and facilitates instrument-guided proof testing, contributing to enhanced plant safety and availability .
Key Specifications
Pressure Measuring Range: Up to 700 bar (10,500 psi)
Accuracy: Standard up to ±0.05%; Platinum version up to ±0.025%
Process Temperature: Standard -40…+125°C (-40…+257°F); with diaphragm seal up to +400°C (+752°F)
Wetted Parts Materials: 316L, Alloy C, Tantalum, Monel, PTFE, Gold
Communication: 4…20 mA HART, PROFINET with Ethernet-APL, optional Bluetooth®
Safety Approvals: SIL
Specialties: Heartbeat Technology, SmartBlue App, RFID Tag, HistoROM, Plug and Play
A notable application example is in hydrogen production via steam reforming, where the PMP71B is used with a 25µ gold-plated diaphragm to effectively prevent hydrogen diffusion into the sensor—a common cause of drift and failure in such harsh environments .