Critical Technical Advantages
-
Superior Precision: The PMC71 offers a standard accuracy of ±0.05%, with a “Platinum” version reaching ±0.025%. This level of precision is essential for inventory control, custody transfer, and high-accuracy mass/volume calculations in tanks.
-
Maximum Safety (SIL 2/3): Certified for use in safety instrumented systems up to SIL 3 (in redundant configurations), the PMC71 features a gastight feedthrough. This secondary containment ensures that even if the process breaks through the primary seal, the electronics and the environment remain protected.
-
HistoROM Data Management: This innovative concept stores all device parameters and event logs on a removable memory module. It allows for effortless commissioning and maintenance; if a transmitter needs replacement, the configuration is simply swapped into the new unit without the need for re-parameterization.
-
Advanced Ceramic Durability: The capacitive Ceraphire membrane is virtually immune to the effects of vacuum, which typically causes “oil-oil” or metallic diaphragms to fail. It also features integrated breakage detection, providing an immediate alarm if the sensor integrity is compromised.
-
Dual-Chamber Housing: The two-chamber design separates the terminal compartment from the electronics compartment. This provides an additional layer of protection against moisture ingress and corrosive atmospheres during wiring or maintenance.
-
Overload Resistance: The high-purity ceramic sensor can handle significant overpressure (overload) events without shifting its zero point or damaging the sensor structure, ensuring long-term measurement stability.
Technical Performance Matrix
| Feature | Details |
| Measuring Principle | Capacitive Ceramic (Oil-free) |
| Measurement Type | Absolute or Gauge Pressure |
| Accuracy | ±0.05% (Standard) / ±0.025% (Platinum) |
| Measuring Range | -1/0 to +40 bar (-15/0 to +600 psi) |
| Process Temperature | -40 to +150°C (-40 to +302°F) |
| Safety Rating | SIL 2/3 (IEC 61508) |
| Communication | HART, PROFIBUS PA, FOUNDATION Fieldbus |
Primary Applications
-
Critical Level Measurement: High-precision volume and mass measurement in large storage tanks for chemical and oil industries.
-
Vacuum Distillation Columns: Reliable pressure monitoring in high-vacuum environments where metallic seals would fail.
-
Hygienic Processing: Measuring pressure and level in pharmaceutical or food production lines requiring 150°C temperature stability for sterilization.
-
Safety Instrumented Systems (SIS): Serving as the primary sensor for overfill prevention (WHG) and high-pressure safety trips.
-
Corrosive/Abrasive Fluids: Handling aggressive chemical media (e.g., chlorine, acids) or slurries that would erode standard metallic sensors.
