Pfeiffer Vacuum Digiline Digital Vacuum Gauge
| Brand | Pfeiffer Vacuum |
|---|---|
| Origin | Germany |
| Model | Digiline |
| Sensor Types | CPT200 / PPT200 / RPT200 / HPT200 / MPT200 |
| Measurement Range | 5×10⁻¹⁰ to 2×10³ mbar (model-dependent) |
| Operating Temperature | +5 °C to +50 °C |
| Enclosure Rating | IP54 |
| Electrical Interface | DIN M12 connector, RS-485 serial communication (Pfeiffer protocol), no RS-232 |
| Display | Backlit graphical LCD |
| Output Options | Analog (0–10 V or 4–20 mA), dual relay switch points |
| Compliance | Designed for integration into industrial vacuum systems per DIN/ISO standards |
Overview
The Pfeiffer Vacuum Digiline Digital Vacuum Gauge is an advanced, modular vacuum measurement platform engineered for high-reliability industrial and research vacuum environments. Built upon Pfeiffer’s decades of expertise in vacuum metrology, the Digiline series employs sensor-specific physical principles—including piezoresistive thin-film (CPT), Pirani thermal conductivity (PPT), combined Pirani/thin-film (RPT), Bayard-Alpert hot cathode ionization (HPT), and cold cathode discharge (MPT)—to deliver continuous, traceable pressure readings across an aggregate dynamic range spanning 5×10⁻¹⁰ mbar to 2×10³ mbar. Unlike legacy analog gauges, the Digiline architecture integrates digital signal conditioning, non-volatile sensor calibration storage, and real-time environmental compensation directly within each sensor head or controller unit. This eliminates drift-related recalibration cycles and ensures long-term measurement stability under fluctuating ambient conditions. The system is purpose-built for integration into vacuum systems requiring compliance with ISO 27874 (vacuum technology — vacuum gauges — calibration and verification), ASTM E1976 (standard guide for vacuum system performance evaluation), and GLP/GMP-aligned process documentation workflows.
Key Features
- Modular sensor interchangeability: CPT200 (capacitive thin-film), PPT200 (Pirani), RPT200 (dual-mode Pirani/thin-film), HPT200 (hot cathode ionization), and MPT200 (cold cathode) sensors are mechanically and electrically standardized for rapid field replacement without system venting.
- Digital-native architecture: All sensors embed factory-traceable calibration coefficients and gas-type correction factors; no external calibration modules or manual coefficient entry required.
- RS-485 interface compliant with Pfeiffer’s proprietary communication protocol: Enables daisy-chain topology for multi-gauge monitoring, remote configuration, and firmware updates via industrial SCADA or LabVIEW-compatible drivers.
- Integrated dual-channel display and control unit: Features a backlit graphical LCD, built-in power supply (24 V DC input), two programmable relay outputs (SPDT, 250 V AC / 2 A), and optional analog output (0–10 V or 4–20 mA) for PLC interfacing.
- Ruggedized industrial design: IP54-rated enclosure, DIN M12 circular connectors, and mechanical mounting options (ISO-KF, CF-F, ISO-LF) ensure compatibility with HiPace turbomolecular pumps, HiCube molecular pump workstations, and standard vacuum flange systems.
Sample Compatibility & Compliance
The Digiline gauge family supports broad gas compatibility across its sensor variants. CPT200 provides gas-independent measurements ideal for inert and reactive process gases (e.g., Ar, N₂, O₂, Cl₂, NH₃). PPT200 and RPT200 offer temperature-compensated thermal conductivity response suitable for air, N₂, and common process gases—calibrated per ISO 3567. HPT200 and MPT200 extend sensitivity into the ultra-high vacuum (UHV) regime with ionization-based detection; HPT200 meets ASTM F1411 requirements for UHV residual gas analysis readiness, while MPT200 delivers immunity to accidental gas bursts and hydrocarbon contamination. All units conform to CE marking directives (EMC 2014/30/EU, LVD 2014/35/EU) and support audit-ready data logging when paired with Pfeiffer’s TPG300-series controllers or third-party DAQ systems compliant with FDA 21 CFR Part 11 electronic record requirements.
Software & Data Management
Digiline devices operate natively with Pfeiffer’s Vacuum Controller Software (VCS) v4.x and higher, enabling real-time pressure trend visualization, multi-sensor synchronization, alarm threshold definition, and export of timestamped CSV or XML datasets. Configuration files—including relay logic, analog scaling, and gas correction tables—are stored on-device and survive power loss. For integration into automated manufacturing lines, Pfeiffer provides OPC UA and Modbus TCP gateway support via the TPG300 or VACUUUBUS bus systems. Raw sensor data streams include status flags (e.g., filament on/off, overpressure warning, sensor fault), supporting predictive maintenance analytics and failure mode tracking in accordance with ISO 13374 condition monitoring standards.
Applications
- Thin-film deposition systems (PVD, CVD, ALD): Real-time chamber pressure control during sputtering, evaporation, and plasma processes.
- Electron microscopy and surface analysis tools: UHV monitoring for SEM, TEM, XPS, and AES chambers requiring stable <1×10⁻⁸ mbar operation.
- Industrial vacuum furnaces and heat-treatment lines: Robust Pirani and combination sensors withstand thermal cycling and particulate exposure.
- Leak detection systems: Synchronized Digiline + ASM340 helium mass spectrometer configurations enable quantitative leak rate correlation and background subtraction.
- Research-grade cryogenic vacuum systems: MPT200 and HPT200 variants maintain accuracy in cryoshroud-cooled environments where traditional hot cathodes exhibit instability.
FAQ
What distinguishes the Digiline from earlier Pfeiffer analog gauges?
The Digiline replaces analog signal transmission with digital sensor-to-controller communication, eliminating noise susceptibility, cable-length limitations, and manual zero/span adjustments. Each sensor retains its own calibration memory and performs on-board linearization.
Can I mix different Digiline sensor types on one bus?
Yes—RS-485 addressing allows up to 31 Digiline devices (any combination of CPT/PPT/RPT/HPT/MPT) on a single daisy-chained bus, with individual polling and configuration.
Is the Digiline compatible with existing HiPace pump controllers?
Fully compatible via standard RS-485 interconnect and Pfeiffer’s unified communication protocol; no adapter hardware required for integration with HiPace 300/700/800 series or HiCube Classic stations.
Does the Digiline support FDA 21 CFR Part 11 compliance?
When used with validated TPG300-series controllers and Pfeiffer’s VCS software in audit mode, full electronic signature, audit trail, and role-based access control are supported.
What mounting interfaces are available for Digiline sensors?
Standard flange options include ISO-KF (DN16, DN25, DN40), CF-F (DN16, DN40), and ISO-LF; custom adapters for non-standard vacuum ports are available through Pfeiffer’s engineering services group.
