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Recommendation:Endress+Hauser Deltabar PMD75-1AA7QE1RAAA | Differential Pressure Transmitter

日期:2026-04-16 00:13
浏览次数:4
摘要:Endress+Hauser Deltabar PMD75-1AA7QE1RAAA Differential Pressure TransmitterEndress+Hauser Deltabar PMD75-1AA7QE1RAAA differential pressure transmitter. ±0.05% accuracy, SIL2/3, 4-20mA HART, metal sensor, up to 420bar overload, for flow/level measurement.

Endress+Hauser Deltabar PMD75-1AA7QE1RAAA
Differential Pressure Transmitter


Endress+Hauser Deltabar PMD75-1AA7QE1RAAA | Differential Pressure Transmitter

The Endress+Hauser PMD75-1AA7QE1RAAA is a high-performance differential pressure transmitter from the Deltabar S series, featuring a piezoresistive sensor with welded metallic membrane . It is designed for continuous measurement of pressure differences in liquids, vapors, and gases across all industries .

This digital transmitter is ideal for flow measurement (volume or mass flow) in conjunction with primary elements, level/volume/mass measurement in liquids, and differential pressure monitoring (e.g., of filters and pumps) .

Order Code Interpretation: PMD75-1AA7QE1RAAA

Based on Endress+Hauser's ordering structure for the Deltabar S PMD75 series :

Position Code Interpretation
Approval 1 ATEX II 1/2G Ex ia IIC T4 Ga/Gb (hazardous area approval) 
Power Supply; Output A 4-20 mA HART, 2-wire 
Housing A Aluminum housing with 4-line digital display 
Sensor Range 7 Measuring cell: 10 mbar...40 bar (0.15...600 psi) 
Process Connection Q Thread 1/4-18 NPT, 316L stainless steel
Calibration Unit E Calibration in mbar/bar
Additional Options 1RAAA Basic configuration with standard features 


Technical Specifications

Parameter Specification
Manufacturer Endress+Hauser
Product Series Deltabar S PMD75
Measuring Principle Differential pressure, piezoresistive sensor with welded metallic membrane 
Pressure Measuring Range 10 mbar to 250 bar (0.15 to 3750 psi) 
Reference Accuracy Standard: ±0.05%; Platinum: up to ±0.035% 
Long-term Stability 0.05% of URL/year 
Turn Down Up to 100:1 
Smallest Calibratable Span 1 mbar (0.015 psi) 
Vacuum Resistance 50 mbar (0.73 psi) 
Max. Overpressure Limit 420 bar (6300 psi) on one side 
Process Temperature -40°C to +85°C (-40°F to +185°F) 
Ambient Temperature -50°C to +85°C (-58°F to +185°F) 
Output Signal 4-20 mA HART (2-wire) 
Supply Voltage (Non-Ex) 10.5 to 45 V DC 
Supply Voltage (Ex ia) 10.5 to 30 V DC 
Main Wetted Parts Alloy C276, 316L, Monel, Tantalum 
Process Membrane Material 316L, Alloy C, Tantalum, Gold-Rhodium 
Process Connection 1/4-18 NPT, RC1/4" 
Material Gasket Viton, PTFE, EPDM, NBR 
Fill Fluid Silicone oil, inert oil 
Housing Material 316L, Die-cast aluminum 
Housing Protection IP66/IP67, NEMA 4X 
Display 4-line digital display (optional) 
Certifications ATEX, FM, CSA, IECEx, NEPSI, NACE, SIL2/3, WHG, Marine (GL/ABS) 

Deltabar PMD75-1AA7QE1RAAA


Q&A

Q1: What is the accuracy of the Deltabar PMD75-1AA7QE1RAAA?


A: The Deltabar PMD75 offers a standard reference accuracy of ±0.05% . An optional "Platinum" version with up to ±0.035% accuracy is available for applications requiring higher precision. The device also features excellent long-term stability of 0.05% of URL per year .


Q2: Is the PMD75 suitable for use in safety instrumented systems?


A: Yes. The Deltabar PMD75 is SIL2/3 certified according to IEC 61508 (certified by TÜV SÜD), making it suitable for use in safety instrumented systems for critical applications such as overfill prevention and emergency shutdown .


Q3: What communication protocols does this version support?


A: The PMD75-1AA7QE1RAAA with "A" output code supports 4-20 mA HART communication . The Deltabar PMD75 series also offers options for PROFIBUS PA and FOUNDATION Fieldbus protocols for flexible system integration .


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