Endress Hauser Absolute and Gauge Pressure Ceraphant PTC31B PTP31B PTP33B

Product Overview

The Ceraphant PTC31B, PTP31B, and PTP33B are a family of cost-effective pressure switches from Endress+Hauser, designed for safe measurement and monitoring of absolute and gauge pressure in gases, vapors, liquids, and dust. With compact design and integrated switching electronics, they provide decentralized and economic process monitoring and control.

Key Features and Benefits

• Three Sensor Variants for Diverse Applications: The PTC31B features an oil-free ceramic sensor diaphragm for high process availability in vacuum and abrasive media applications. The PTP31B uses a welded metal sensor diaphragm, offering high corrosion and abrasion resistance for measuring in gases, steam, or liquids. The PTP33B, also with a fully welded metal sensor, is specifically designed for hygienic applications with CIP/SIP cleaning capability and 3-A/EHEDG certifications.

• High Long-Term Stability and Reliability: All models provide high reproducibility and long-term stability, with a reference accuracy of up to ±0.3% (Platinum version) and a long-term stability of 0.2% of URL/year.

• On-Site Function Check and Information: Equipped with LEDs and a digital display for easy local function checks and status information.

• IO-Link Connectivity: Available with IO-Link communication, enabling easy configuration and flexible integration into all fieldbus systems, reducing both cost and complexity.

• Designed for International Use: Backed by a broad range of approvals and process connections, making them suitable for global applications.

Technical Specifications (at a Glance)

The Ceraphant series provides a versatile, reliable, and cost-effective solution for pressure monitoring across standard to hygienic applications, combining robust sensor technology with flexible integration options.

Endress Hauser Cerabar Pressure Transmitter PMP50

Product Overview

The Cerabar PMP50 is a pressure transmitter from Endress+Hauser, designed with a fully welded metal membrane for highly accurate measurement of liquids and gases. It is optimized for standard applications across various industries, providing intuitive operation and robust performance.

Key Features and Benefits

• High Accuracy: Offers reference accuracy up to ±0.055% (Platinum version) for precise and reliable measurements.

• Versatile Measuring Range: Capable of measuring pressure up to 400 bar (6000 psi). The measuring cell covers a range from 1 bar to 400 bar with a maximum turndown of 20:1.

• Wide Temperature Capability: Handles process temperatures from -40°C to +125°C (-40°F to +257°F) in its standard configuration. With a diaphragm seal, this range extends from -70°C to +400°C (-94°F to +752°F).

• User-Friendly Commissioning: Features a software wizard that enables fast and straightforward setup. On-device operation is supported by intuitive zero/span buttons and an optional color display accessible via magnetic buttons.

• Robust Safety and Compliance: Developed in accordance with IEC 61508 for functional safety (SIL), offering flexible write protection via hardware or software. It holds numerous international approvals including ATEX, FM, and IECEx for hazardous area use.

• Durable Construction: The process membrane is available in materials like 316L, AlloyC, and Gold to ensure compatibility with various media. The housing is offered in aluminum or 316L stainless steel for durability in harsh environments.

Technical Specifications (at a Glance)

The Cerabar PMP50 is a robust, versatile, and reliable solution for standard pressure measurement applications, combining high performance with ease of use and a strong focus on safety and operational security.

Endress Hauser Gauge Pressure Cerabar PMC11 PMP11

Product Overview

The Cerabar PMC11 and PMP11 are cost-effective compact pressure transmitters from Endress+Hauser, designed for reliable gauge pressure measurement in gases and liquids across standard industrial applications . These entry-level models combine robust construction with dependable performance, making them ideal for basic process monitoring tasks .

Sensor Technology and Models

• Cerabar PMC11: Features a capacitive, oil-free ceramic measuring diaphragm (Al₂O₃) with high abrasion resistance . The oil-free design eliminates contamination risks and provides excellent long-term stability.

• Cerabar PMP11: Equipped with a piezoresistive, fully welded metal sensor for robust performance in demanding environments . The all-metal construction ensures high durability and process compatibility.

Key Specifications

Both models offer identical core performance parameters :

• Measuring Range: +400 mbar to +40 bar (6 to 600 psi)

• Reference Accuracy: ±0.5% of span

• Process Temperature: -25 to +85°C (-13 to +185°F)

• Long-Term Stability: ±0.2% of URL per year

• Output Signals: 4-20 mA or 0-10 V analog outputs 

Design and Benefits

The transmitters feature a compact, space-saving construction with customizable measuring ranges, simplifying installation and setup . Made from high-quality 316L stainless steel, they withstand harsh process conditions . Threaded process connections (G1/4, G1/2, MNPT) ensure flexible integration .

Applications

Cerabar PMC11 and PMP11 are ideal for standard gauge pressure monitoring in:

• Water and wastewater treatment

• General process industry applications

• Utilities and mechanical systems

• Food & beverage industry standard tasks 

Endress Hauser Cerabar Pressure Transmitter PMP51B PMC51B PMC71B

Product Overview

The Cerabar PMP51B, PMC51B, and PMC71B are high-performance pressure transmitters from Endress+Hauser’s latest Cerabar generation, designed for the precise measurement of absolute and gauge pressure in liquids and gases. These devices combine robust sensor technology with a user-centric design, offering intuitive operation via guided wizards and optional remote control through the SmartBlue App and a secure Bluetooth connection.

Models and Sensor Technology

• Cerabar PMP51B: Features a metal membrane and is ideal for accurate measurement in liquids and gases. It is available with diaphragm seals for demanding applications and offers a measuring range up to 400 bar (6000 psi).

• Cerabar PMC51B: Utilizes a ceramic membrane (Ceraphire®). It is fully vacuum-resistant up to +100°C and designed for applications requiring high system safety, with integrated membrane breakage detection.

• Cerabar PMC71B: Equipped with a high-end ceramic membrane for premium accuracy, especially in abrasive, high-vacuum, or corrosive applications. It is fully vacuum-resistant up to +150°C.

Key Features and Benefits

• High Accuracy: All models deliver excellent measurement precision. The PMC51B and PMP51B offer a standard accuracy of up to ±0.075% and a platinum version with ±0.055%. The PMC71B provides top-tier accuracy of ±0.05% standard and ±0.025% in its platinum version.

• Long-Term Stability: These transmitters are designed for reliable performance over time, with long-term stability of 0.1% of URL/year for the PMP51B, and 0.10% of URL/year for the PMC51B and PMC71B.

• Advanced Diagnostics: The PMC71B is equipped with Heartbeat Technology, enabling continuous diagnostics and on-demand verification without process interruption, as well as monitoring for process anomalies.

• Digital Communication: All models support 4-20 mA HART communication. Options include PROFINET with Ethernet-APL and Bluetooth® wireless technology for remote access and operation via the SmartBlue App.

• Global Approvals: The transmitters are approved for use in hazardous areas with certifications including ATEX, IECEx, CSA, and NEPSI.

Applications

The Cerabar PMP51B, PMC51B, and PMC71B are suitable for a wide range of industrial applications, including:

• Pressure measurement in liquids and gases

• Hydrostatic level measurement in tanks and vessels

• Applications requiring high accuracy and long-term stability

• Demanding processes with corrosive or abrasive media

Endress+Hauser Cerabar PMP43 Hygienic Pressure Transmitter

Product Overview

The Cerabar PMP43 is a compact, high-performance pressure transmitter from Endress+Hauser’s Compact Line, specifically engineered for demanding hygienic applications in the food & beverage and life science industries . It provides precise and reliable measurement of absolute and gauge pressure in liquids and gases, making it ideal for pressure monitoring and hydrostatic level measurement in pipelines, process tanks, and storage vessels .

Key Features and Benefits

• High Accuracy and Performance: The PMP43 delivers excellent measurement precision with a reference accuracy of up to ±0.075% (platinum version) . It offers a pressure measuring range of 400 mbar to 100 bar (6 psi to 1450 psi) .

• Designed for Hygienic Environments: Featuring a fully welded, 360-degree hygienic design with IP69 ingress protection, the device ensures efficient cleaning and prevents contamination . It holds key hygienic certifications including 3-A, EHEDG, and CoC-ASME BPE .

• Wide Process Temperature Range: The transmitter is capable of handling standard process temperatures from -40°C to +130°C, with an optional version supporting up to +200°C . This makes it suitable for both CIP (Clean-in-Place) and SIP (Steam-in-Place) processes .

• Compact and Flexible Installation: Its compact sensor design and a wide variety of small hygienic process connections allow for flexible installation, even in tight spaces and narrow skids .

• Advanced Diagnostics (Heartbeat Technology): The PMP43 is equipped with Endress+Hauser’s Heartbeat Technology, which enables continuous diagnostics, on-demand verification without process interruption, and monitoring for process anomalies like blocked impulse lines .

• Intuitive Operation and Communication: It features a user-friendly interface with a colored, backlit touch display for guided commissioning . The device supports standard 4-20 mA and HART communication, with options for IO-Link and Bluetooth® for advanced digital integration .

Applications

The Cerabar PMP43 is the ideal solution for a variety of critical hygienic applications:

• Pressure monitoring in process pipes 

• Hydrostatic level measurement in process and pressurized tanks 

• Pressure monitoring in compact skids, modules, and small equipment 

It is perfectly suited for the Food & Beverage and Life Science industries, where product safety, cleanability, and process reliability are paramount

Endress Hauser Absolute and gauge pressure Cerabar PMC21 PMP21 PMP23

The Cerabar PMC21, PMP21, and PMP23 are a family of cost‑effective pressure transmitters designed for absolute and gauge pressure measurement in general industrial applications. They combine robust sensor technology with high accuracy and flexible configuration to meet diverse process requirements.

Key Specifications & Features:

• Reference accuracy: ±0.3 %

• Long‑term stability: 0.2 % URL/year

• Wetted materials: 316L stainless steel

• Output signals: 4‑20 mA and IO‑Link

• Global approvals: ATEX, IECEx, NEPSI, and other hazardous area certifications

All models offer reliable performance, easy commissioning, and are built to withstand harsh industrial environments while providing cost‑effective pressure measurement solutions.

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 .

Endress+Hauser Electronic Differential Pressure Deltabar FMD71 / FMD72

1. Positioning & Core Value

The Deltabar FMD71 and FMD72 form an electronic differential pressure (EDP) measurement system developed by Endress+Hauser, specifically designed for liquid level, volume, and mass measurement in pressurized or vacuum vessels. Their core value lies in replacing traditional mechanical differential pressure methods (such as impulse lines and capillary tubes) with an advanced electronic architecture, effectively eliminating many long-standing operational issues.

The system delivers higher process reliability and safety while significantly reducing total cost of ownership.

2. System Architecture & Operating Principle

Unlike conventional integrated DP transmitters, the FMD71/FMD72 is a modular system consisting of three main components:

• Two sensor modules – installed at the high-pressure (HP) side (measuring hydrostatic pressure) and the low-pressure (LP) side (measuring vessel top pressure).

• One transmitter – receives digital signals from both sensors, calculates the differential pressure internally (HP value minus LP value), and outputs a 4…20 mA HART signal.

By subtracting the top pressure from the total hydrostatic pressure, the system effectively cancels out the influence of pressure fluctuations above the liquid surface, delivering a true net level reading.

3. Model Differentiation & Sensor Technology

The primary difference between the FMD71 and FMD72 lies in their sensor technologies, catering to different application requirements:

4. Key Performance & Advantages

• Enhanced reliability and safety – Eliminates common issues found in traditional mechanical systems, such as impulse line clogging, condensation, leakage, and thermal drift caused by ambient temperature changes in capillaries. In one chemical plant distillation application, the FMD72 system operated stably for over 18 months without maintenance, whereas the previous capillary system failed every 4–6 months due to temperature and vacuum issues.

• High measurement accuracy – Reference accuracy of ±0.075 % per sensor; optional “PLATINUM” version offers an enhanced accuracy of ±0.05 %.

• Cost efficiency – Standard electrical cabling simplifies installation and maintenance. Individual components can be replaced without recalibration or reconfiguration, reducing spare parts inventory and overall lifecycle costs.

• Advanced diagnostics – Via HART protocol, the system provides continuous system health status along with multivariable information including differential pressure, individual pressures, and sensor temperature – facilitating predictive maintenance.

5. Key Technical Specifications (Overview)

6. Typical Industries & Applications

The Deltabar FMD71/FMD72 system is widely deployed across the oil & gas, chemical, food & beverage, life sciences, power generation, and metallurgy industries. It excels in demanding applications such as:

• High distillation columns

• Evaporators

• Reactors

• Storage tanks with fluctuating top pressures

In these complex environments, the system delivers outstanding performance where conventional DP solutions often fall short.

Endress Hauser Electronic Differential Pressure Deltabar FMD71 FMD72

The Deltabar FMD71 and FMD72 form a modular electronic differential pressure (EDP) measurement system developed by Endress+Hauser, specifically designed for liquid level, volume, and mass measurement in pressurized or vacuum vessels. The system consists of two sensor modules (high-pressure side HP and low-pressure side LP) and one transmitter: the HP sensor measures the hydrostatic pressure, the LP sensor measures the top pressure of the vessel, and the transmitter calculates the net differential pressure from the digital signals, effectively eliminating the influence of pressure fluctuations above the liquid surface. Compared with traditional mechanical systems (impulse lines, capillaries), this system fundamentally eliminates issues such as clogging, condensation, leakage, and thermal drift caused by ambient temperature variations.

The core difference between the FMD71 and FMD72 lies in their sensor technologies:

• FMD71 employs a ceramic sensor (Ceraphire®) : This is a dry measurement principle with no oil filling. Process pressure acts directly on a high-purity ceramic diaphragm (99.9% Al₂O₃), and pressure is detected via capacitance change. Its outstanding features include an overpressure capability of up to 40 times the measuring range, as well as the ability to operate in absolute vacuum conditions (up to 150°C). This makes it particularly suitable for vacuum applications and highly corrosive media.

• FMD72 employs a metal sensor (silicon technology) : Process pressure is transmitted through a metallic isolation diaphragm and fill fluid to a semiconductor piezoresistive chip. Its fully welded metallic construction can withstand process pressures of up to 160 bar, and its thermal effect is significantly lower than that of conventional diaphragm seal systems. It is ideal for high-pressure distillation columns, steam applications, and elevated process pressures.

Performance and advantages – The reference accuracy of each sensor is ±0.075 %, with an optional “PLATINUM” high-accuracy version offering ±0.05 %; the overall system accuracy can reach ±0.07 %. Long-term stability is rated at 0.05 % URL/year. Via the HART protocol, the system provides continuous health status diagnostics and outputs multivariable information including differential pressure, individual pressures, and sensor temperature, supporting predictive maintenance strategies. Thanks to standard electrical cabling, individual components can be replaced independently without recalibration, significantly reducing installation, maintenance, and spare parts costs.

Key technical specifications:

The system is widely used across the oil & gas, chemical, food & beverage, life sciences, power generation, and metallurgy industries. It excels particularly in high distillation columns, evaporators, reactors, and other demanding applications where measurement reliability and accuracy are critical.

Endress Hauser Deltabar Differential Pressure Transmitter PMD75B PMD55B PMD50 PMD78B

The Deltabar series is Endress+Hauser’s high-performance differential pressure transmitter product line, utilizing piezoresistive metallic diaphragm sensor technology for a wide range of differential pressure, level, and flow measurement applications. The four models—PMD50, PMD55B, PMD75B, and PMD78B—are structured according to Endress+Hauser’s FLEX product selection philosophy, covering the complete spectrum from fundamental to expert-level solutions, enabling users to select the most suitable instrument for their specific process conditions.

PMD50 – Fundamental

The PMD50 is a basic differential pressure transmitter optimized for standard applications. Equipped with a metallic diaphragm sensor, it is suitable for differential pressure monitoring of liquids and gases, with a maximum measuring range of 40 bar (600 psi) and reference accuracy up to 0.055%. The device features an intuitive setup wizard for rapid commissioning and is developed in accordance with IEC 61508 functional safety standards, offering SIL certification. Key wetted parts are available in 316L, Alloy C, or Gold materials. Process temperature ranges from -40 to 110°C (up to 400°C with diaphragm seal), with a maximum static pressure of 160 bar (2320 psi), turndown ratio of 20:1, and long-term stability of 0.1% URL/year.

PMD55B – Lean

The PMD55B is a next-generation Deltabar transmitter positioned as a versatile, cost-effective general-purpose instrument. It supports both local and remote operation via the SmartBlue App and Bluetooth connectivity, enabling mobile device control for significantly improved service efficiency. The software includes an intuitive setup wizard that guides users through instrument configuration and functional safety testing, effectively reducing the risk of operating errors. Measuring range up to 40 bar (600 psi), with Platinum-class accuracy of ±0.055%, maximum static pressure of 250 bar (3750 psi), turndown ratio of 100:1, and long-term stability of 0.05% URL/year. Wetted parts are available in 316L and Alloy C materials, process temperature range from -40 to 110°C, with support for 4-20mA HART and PROFINET over Ethernet-APL communication, and SIL certification.

PMD75B – Extended

The PMD75B is a high-performance differential pressure transmitter integrated with Heartbeat Technology, positioned to optimize process operations through innovative diagnostic capabilities. This technology enables in-situ verification and self-monitoring without process interruption, and can detect process abnormalities such as impulse line blockage. Device status is intuitively indicated by the display color—switching from green to red when a diagnostic event occurs. Differential pressure range up to 40 bar (600 psi), gauge/absolute pressure range up to 250 bar (3750 psi), with Platinum-class accuracy of ±0.035% and maximum static pressure of 420 bar (6300 psi). Key wetted parts are available in a variety of corrosion-resistant materials including 316L, Alloy C, Tantalum, Monel, or Gold. Also supports SmartBlue App Bluetooth remote operation and SIL functional safety certification.

PMD78B – Xpert

The PMD78B is an expert-level differential pressure transmitter designed for harsh process conditions and extreme-temperature measurement requirements. Equipped with diaphragm seals and capillary tubes, it is ideal for high process temperatures, corrosive media, or applications requiring process isolation. Process temperature range spans from -70 to +400°C (with diaphragm seal), with a maximum measuring range of 40 bar (600 psi) and static pressure of 160 bar (2400 psi). This model also features Heartbeat Technology for device health verification and abnormality detection during process operation, along with SmartBlue App Bluetooth remote operation. Platinum-class accuracy up to ±0.075%, turndown ratio of 100:1, and long-term stability of 0.025% URL/year. The TempC diaphragm technology effectively minimizes the impact of ambient and process temperature variations on measurement accuracy.

All four models share the core design principles of the Deltabar family, including intuitive setup wizards, flexible material selection, a comprehensive range of explosion-proof certifications, and SIL functional safety certification. Users can select the appropriate model based on application complexity, accuracy requirements, and the severity of process conditions.

Endress+Hauser Deltabar Differential Pressure Transmitter Series – Product Description

The Deltabar series is Endress+Hauser’s high-performance differential pressure transmitter product line, utilizing piezoresistive metallic diaphragm sensor technology for a wide range of differential pressure, level, and flow measurement applications. The four models—PMD50, PMD55B, PMD75B, and PMD78B—are structured according to Endress+Hauser’s FLEX product selection philosophy, covering the complete spectrum from fundamental to expert-level solutions, enabling users to select the most suitable instrument for their specific process conditions.

PMD50 – Fundamental

The PMD50 is a basic differential pressure transmitter optimized for standard applications. Equipped with a metallic diaphragm sensor, it is suitable for differential pressure monitoring of liquids and gases, with a maximum measuring range of 40 bar (600 psi) and reference accuracy up to 0.055%. The device features an intuitive setup wizard for rapid commissioning and is developed in accordance with IEC 61508 functional safety standards, offering SIL certification. Key wetted parts are available in 316L, Alloy C, or Gold materials. Process temperature ranges from -40 to 110°C (up to 400°C with diaphragm seal), with a maximum static pressure of 160 bar (2320 psi), turndown ratio of 20:1, and long-term stability of 0.1% URL/year.

PMD55B – Lean

The PMD55B is a next-generation Deltabar transmitter positioned as a versatile, cost-effective general-purpose instrument. It supports both local and remote operation via the SmartBlue App and Bluetooth connectivity, enabling mobile device control for significantly improved service efficiency. The software includes an intuitive setup wizard that guides users through instrument configuration and functional safety testing, effectively reducing the risk of operating errors. Measuring range up to 40 bar (600 psi), with Platinum-class accuracy of ±0.055%, maximum static pressure of 250 bar (3750 psi), turndown ratio of 100:1, and long-term stability of 0.05% URL/year. Wetted parts are available in 316L and Alloy C materials, process temperature range from -40 to 110°C, with support for 4-20mA HART and PROFINET over Ethernet-APL communication, and SIL certification.

PMD75B – Extended

The PMD75B is a high-performance differential pressure transmitter integrated with Heartbeat Technology, positioned to optimize process operations through innovative diagnostic capabilities. This technology enables in-situ verification and self-monitoring without process interruption, and can detect process abnormalities such as impulse line blockage. Device status is intuitively indicated by the display color—switching from green to red when a diagnostic event occurs. Differential pressure range up to 40 bar (600 psi), gauge/absolute pressure range up to 250 bar (3750 psi), with Platinum-class accuracy of ±0.035% and maximum static pressure of 420 bar (6300 psi). Key wetted parts are available in a variety of corrosion-resistant materials including 316L, Alloy C, Tantalum, Monel, or Gold. Also supports SmartBlue App Bluetooth remote operation and SIL functional safety certification.

PMD78B – Xpert

The PMD78B is an expert-level differential pressure transmitter designed for harsh process conditions and extreme-temperature measurement requirements. Equipped with diaphragm seals and capillary tubes, it is ideal for high process temperatures, corrosive media, or applications requiring process isolation. Process temperature range spans from -70 to +400°C (with diaphragm seal), with a maximum measuring range of 40 bar (600 psi) and static pressure of 160 bar (2400 psi). This model also features Heartbeat Technology for device health verification and abnormality detection during process operation, along with SmartBlue App Bluetooth remote operation. Platinum-class accuracy up to ±0.075%, turndown ratio of 100:1, and long-term stability of 0.025% URL/year. The TempC diaphragm technology effectively minimizes the impact of ambient and process temperature variations on measurement accuracy.

All four models share the core design principles of the Deltabar family, including intuitive setup wizards, flexible material selection, a comprehensive range of explosion-proof certifications, and SIL functional safety certification. Users can select the appropriate model based on application complexity, accuracy requirements, and the severity of process conditions.