Critical Technical Advantages
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Vacuum-Resistant Ceramic Sensor: The PTC31B uses a dry capacitance ceramic sensor that is high-vacuum resistant up to 0 bar absolute. Unlike metallic diaphragms, the Ceraphire ceramic cell does not suffer from permanent deformation under vacuum, ensuring long-term measurement stability
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IO-Link Connectivity: The device is IO-Link capable, which significantly simplifies integration into all standard fieldbus systems. This allows for remote parameterization, easy device replacement, and reduced wiring complexity.
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Onsite Visibility: The switch includes a bright digital display and status LEDs, allowing for immediate function checks and process information directly at the measurement point.
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Decentralized Control: With its integrated switching electronics, the PTC31B can manage control tasks locally, reducing the load on the central PLC and providing an economic solution for process monitoring.
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High Sensitivity: The device can handle minimum spans as low as 0 to 20 mbar, providing highly reliable insights even in low-pressure applications.
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Abrasion and Chemical Resistance: The ceramic membrane is naturally resistant to abrasive particles and aggressive media, leading to higher process availability and reduced maintenance compared to traditional sensors.
Technical Performance Matrix
| Feature | Details |
| Measuring Principle | Capacitive Ceramic (Ceraphire) |
| Measurement Type | Absolute and Gauge Pressure |
| Pressure Range | -1/0 up to +40 bar (-15/0 up to +600 psi) |
| Accuracy | ±0.3% |
| Process Temperature | -25 to +100°C (-13 to +212°F) |
| Digital Interface | IO-Link |
| Outputs | Switch output (PNP) and optional analog output |
Primary Applications
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Vacuum Monitoring: Safe operation in vacuum distillation or extraction processes where absolute zero pressure may be reached.
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Abrasive Media Handling: Pressure switching in fluids containing solid particles, such as wastewater or slurries.
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Gas and Liquid Utilities: Monitoring pressure in compressed air lines, cooling water circuits, and gas distribution networks.
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Dust Environments: Certified for safe monitoring in areas where combustible dust may be present.
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Decentralized Pump Control: Using the integrated switch to start or stop pumps based on set pressure thresholds.
