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

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 .
