Endress+Hauser PMC71 Original Pressure Transmitter 0.05% High Accuracy PMC71 Original Smart Pressure Transmitter SIL 2/3 Certified

Endress+Hauser PMC71 Original Pressure Transmitter 0.05% High Accuracy PMC71 Original Smart Pressure Transmitter SIL 2/3 Certified
Product Introduction
The Cerabar PMC71 from Endress+Hauser is a high-performance digital pressure transmitter designed for precise measurement of gauge and absolute pressure in challenging industrial environments. Engineered with an oil-free, capacitive ceramic measuring cell, it delivers exceptional reliability, accuracy, and long-term stability for pressure, level, volume, or mass monitoring in liquids and gase.
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Product Description

The Endress+Hauser Cerabar PMC71 is a high-performance, digital pressure transmitter specifically engineered for precise and reliable measurement of gauge pressure and absolute pressure in a wide range of industrial and hygienic applications. As a core product in Endress+Hauser’s Cerabar S series, the PMC71 stands out for its oil-free, capacitive ceramic measuring cell, robust construction, and advanced safety features, making it an ideal solution for demanding process environments where accuracy, stability, and operational safety are critical. Designed to adapt to diverse media and harsh conditions, this transmitter delivers consistent performance across industries, supporting efficient process control, reduced maintenance costs, and enhanced operational reliability.

1. Product Overview

The Cerabar PMC71 is a digital pressure transmitter tailored for measuring pressure, level, volume, and mass in liquids, gases, and steam across process engineering and process measurement technology fields. Its core design revolves around a dry, oil-free ceramic measuring cell (Ceraphire®), which eliminates the risk of oil contamination in sensitive processes and ensures superior chemical and mechanical stability. The transmitter features a modular design, allowing for easy replacement of sensors, displays, or electronics, thereby reducing downtime and maintenance costs. With a wide range of process connections, housing options, and communication protocols, the PMC71 offers exceptional flexibility to meet the unique requirements of various industrial sectors, from chemical processing to food and beverage production.

2. Measuring Principle

The PMC71 utilizes a capacitive measuring principle with a ceramic process isolating diaphragm (Ceraphire®), a 99.9% high-purity aluminum oxide (Al₂O₃) membrane that ensures optimal performance and durability. As a dry sensor, the process pressure acts directly on the robust ceramic diaphragm, causing it to deflect. This deflection induces a pressure-dependent change in capacitance between the electrodes of the ceramic substrate and the process isolating diaphragm, which is then measured and converted into a precise electrical signal for further processing. The measuring range of the transmitter is determined by the thickness of the ceramic diaphragm, allowing for flexible calibration to meet specific application needs.
A key advantage of this measuring principle is its inherent overload resistance, with the ceramic sensor guaranteeing resistance up to 40 times the nominal pressure (overpressure limit, OPL), depending on the selected components. Additionally, the dry ceramic design makes the PMC71 highly suitable for vacuum applications and processes involving corrosive or abrasive media, as it eliminates the risk of fill fluid leakage and contamination.

3. Key Technical Specifications

3.1 Measuring Performance

  • Measuring Type: Gauge pressure, absolute pressure, and vacuum measurement
  • Measuring Range: 100 mbar to 40 bar (1.5 psi to 600 psi) for standard configurations; absolute pressure with a maximum overpressure limit of 60 bar (900 psi)
  • Accuracy: Standard version ±0.075% of upper range limit (URL); "Platinum" version up to ±0.025% of URL for highest precision requirements
  • Long-Term Stability: 0.05% of URL per year, ensuring consistent performance over extended operational periods
  • Turn-Down Ratio: Up to 100:1, with higher ratios available upon request, allowing for flexible adaptation to changing process conditions
  • Maximum Measurement Distance: 400 m (1312 ft) H₂O for level measurement applications

3.2 Operating Conditions

  • Process Temperature: -40°C to +150°C (-40°F to 302°F) without diaphragm seals; up to 400°C (752°F) when equipped with typical diaphragm seals for high-temperature applications
  • Ambient Temperature: -40°C to +85°C (-40°F to 185°F), ensuring reliable operation in extreme environmental conditions
  • Supply Voltage: 4...20 mA HART: 10.5...45 V DC; Ex ia: 10.5...30 V DC; PROFIBUS PA/Foundation Fieldbus: 9...32 V DC
  • Protection Class: IP66/67, making it suitable for harsh ambient conditions with dust, moisture, and other contaminants


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Products Recommended

Pressure Transmitters for Industrial Pressure Measurement

Xinyi Instrument supplies pressure transmitters for process control, hydraulic systems, petrochemical plants, water treatment, HVAC, power generation and general industrial pressure monitoring. Our pressure transmitter range covers gauge pressure, absolute pressure, differential pressure, high temperature media and digital communication applications.

Choose from compact pressure transmitters, smart 3051 differential pressure transmitters, diaphragm seal models, RS485 digital pressure transmitters and high frequency dynamic pressure sensors. Standard outputs include 4-20 mA, voltage output, HART and RS485 Modbus options, with stainless steel wetted parts and custom process connections available on request.

Pressure Transmitter Parameters

Pressure Types Gauge, absolute, negative pressure, differential pressure
Measuring Range From low differential pressure to high pressure ranges up to 100 MPa, depending on model
Output Signals 4-20 mA, 0-5 V, 1-5 V, 0-10 V, RS485 Modbus, HART options
Accuracy Typical options include 0.1%, 0.2%, 0.25% and 0.5% FS
Process Connection M20 x 1.5, G1/4, G1/2, NPT and customized thread connections
Wetted Materials Stainless steel, 316L diaphragm and corrosion-resistant sealing options
Media Water, oil, gas, air, steam and compatible liquid or gas media
Applications Pipeline pressure, tank level, flow differential pressure, hydraulic pressure and automation systems

Recommended Pressure Transmitter Series

  • Xinyi YW-150 - differential pressure transmitter for stable industrial measurement.
  • Xinyi YW-3051DP - smart differential pressure transmitter for process control.
  • Xinyi YW-130 / YW-140 - compact pressure transmitters for general pressure monitoring.
  • RS485 Digital Pressure Transmitter - Modbus communication for remote monitoring systems.
  • High Temperature Pressure Transmitter - designed for hot media and demanding process conditions.
  • Siemens, Yokogawa and ABB Options - international brand transmitters available for project matching.

Pressure Transmitter FAQ

What is a pressure transmitter used for?

A pressure transmitter converts the pressure of liquid, gas or steam into a standard electrical signal for PLC, DCS, recorder or control instrument input. It is widely used for pipeline pressure, tank level, flow measurement and process safety monitoring.

How do I choose the right pressure transmitter?

Confirm the pressure range, pressure type, medium, temperature, output signal, accuracy, installation thread, electrical connection and environmental requirements. For corrosive media, high temperature or sanitary applications, diaphragm material and sealing structure are especially important.

What is the difference between gauge, absolute and differential pressure transmitters?

Gauge pressure transmitters measure pressure relative to atmospheric pressure. Absolute pressure transmitters measure pressure relative to vacuum. Differential pressure transmitters measure the pressure difference between two points and are commonly used for flow, filter and level measurement.

Can Xinyi Instrument provide customized pressure transmitters?

Yes. Xinyi Instrument can support customized pressure ranges, process connections, output signals, cable length, display options and model selection for different industrial applications.