Cerabar PMP5x Series
Metallic Diaphragm Pressure Technology
Robust metallic pressure transmitters for extreme conditions including high pressure, temperature extremes, and hydrogen service
Cerabar PMP51B
±0.075% AccuracyStandard metallic pressure transmitter for demanding applications
Key Features:
- Metallic diaphragm for extreme conditions
- High overload resistance up to 1050 bar
- Gold-plated option for hydrogen service
- Temperature range to 400°C with appropriate fill
Specifications:
- Measuring Range:
- 25 mbar to 700 bar
- Temperature Range:
- -40°C to +125°C standard
- Process Temperature:
- Up to 400°C with fill fluid
- Overload Protection:
- 1.5x nominal pressure
Cerabar PMP55
±0.075% AccuracyAdvanced metallic transmitter with extended diagnostics
Key Features:
- Heartbeat Technology verification
- Extended pressure range to 700 bar
- SIL 2/3 safety certification
- Multiple fill fluid options
Specifications:
- Maximum Pressure:
- 700 bar (10,000 psi)
- Long-term Stability:
- ±0.15% over 10 years
- Safety Rating:
- SIL 2/3 per IEC 61508
- Communication:
- HART, PROFIBUS PA, Foundation Fieldbus
Extreme Applications
Metallic technology for the most demanding pressure measurement challenges
High-Pressure Processes
Reliable measurement up to 700 bar for hydraulic and compression systems
Hydrogen Service
Gold-plated diaphragms prevent hydrogen permeation and drift
Steam Applications
High-temperature capability with appropriate fill fluids
Oil & Gas
Robust construction for upstream and downstream applications
Model Comparison
Select the right metallic transmitter for your extreme application
| Feature | PMP51B Standard | PMP55 Advanced |
|---|---|---|
| Maximum Pressure | 400 bar | 700 bar |
| Accuracy | ±0.075% | ±0.075% |
| Heartbeat Technology | No | Yes |
| Safety Rating | Standard | SIL 2/3 |
| Temperature Range | -40°C to +125°C | -90°C to +400°C |
| Gold-plated Option | Yes | Yes |
| Communication | 4-20mA HART | HART, PA, FF |
Extreme Condition Advantages
Why metallic transmitters excel where others fail
- Extreme pressure capability up to 700 bar (10,000 psi)
- Gold-plated diaphragms available for hydrogen service
- Multiple fill fluids for temperature extremes (-90°C to +400°C)
- High overload protection (1.5x) for pressure spikes
- SIL 2/3 certification for safety-critical applications
- Exceptional long-term stability of ±0.15% over 10 years
Frequently Asked Questions
Common questions about metallic pressure transmitters
When should I choose metallic over ceramic pressure sensors?
Choose metallic sensors (Cerabar PMP5x) for extreme pressures beyond ceramic range (>400 bar up to 700 bar), severe mechanical shock or vibration environments, hydrogen service requiring gold-plated diaphragms, cryogenic applications with special fill fluids, and abrasive slurries needing thicker diaphragms.
What is the maximum pressure rating for PMP5x series?
Cerabar PMP5x metallic transmitters measure up to 700 bar (10,000 psi) continuous pressure with overload protection to 1050 bar. Different models optimize for specific ranges: PMP51 for standard applications to 400 bar, PMP55 for high-pressure to 700 bar.
How do metallic sensors handle hydrogen permeation?
PMP5x offers gold-plated diaphragms specifically for hydrogen service. The gold layer prevents hydrogen atoms from penetrating the diaphragm material, eliminating drift caused by hydrogen accumulation in oil fill.
What fill fluids are available for extreme temperatures?
PMP5x offers various fill fluids: silicone oil (standard -40°C to +125°C), synthetic oil for high temperature to 400°C, FDA-approved oil for food applications, low-temperature oil for cryogenic to -90°C, and inert halocarbon for oxygen service.
How stable are metallic pressure transmitters long-term?
PMP5x achieves ±0.15% stability over 10 years, exceptional for metallic sensors. Advanced manufacturing processes minimize mechanical stress, temperature compensation algorithms correct for ambient changes, and Heartbeat Technology monitors degradation trends.
What safety certifications do PMP5x transmitters have?
Cerabar PMP5x carries comprehensive safety approvals: SIL 2/3 per IEC 61508, explosion protection (ATEX, IECEx, FM, CSA), marine type approvals (DNV-GL, ABS, Lloyd's), and pressure equipment directive (PED) for Europe.
Can metallic transmitters measure viscous or coating media?
Yes, PMP5x handles viscous media through flush diaphragm designs eliminating clogging points, large diameter diaphragms reducing pressure effects, and special coatings (Teflon, tantalum) preventing adhesion.
How do I protect metallic sensors from pressure spikes?
PMP5x includes 1.5x overpressure protection standard, with optional snubbers or dampeners for spike reduction. Install pulsation dampeners at pump discharges and use proper valve opening procedures to prevent water hammer.