ZDZ-1A Vacuum Gauge with Leybold TR211 Pirani Sensor
| Origin | Sichuan, China |
|---|---|
| Manufacturer Type | Distributor |
| Origin Category | Domestic (China) |
| Model | ZDZ-1A |
| Price | Upon Request |
| Full Scale Range | 1×10⁵ to 1×10⁻¹ Pa |
| Compatible Gauge Tube | Leybold TR211 (KF16 Flange) |
Overview
The ZDZ-1A Vacuum Gauge is a precision analog/digital hybrid vacuum measurement instrument engineered for reliable, real-time monitoring of low-to-medium vacuum environments. It operates on the thermal conductivity principle inherent to Pirani gauge technology: gas molecules conduct heat away from a heated filament at a rate proportional to pressure within the 1×10⁵ Pa (atmospheric) to 1×10⁻¹ Pa (rough vacuum) range. The system integrates the Leybold TR211 resistive vacuum sensor—a rigorously calibrated, KF16-flanged Pirani transducer known for long-term stability, minimal zero drift, and compatibility with inert and non-corrosive process gases. Unlike capacitance manometers or cold cathode gauges, the ZDZ-1A provides cost-effective, continuous readout without high-voltage components or complex ionization mechanisms—making it ideal for applications where robustness, ease of integration, and operational simplicity are prioritized over ultra-high vacuum capability.
Key Features
- Integrated signal conditioning electronics housed in a compact, front-panel-display enclosure with analog output (0–10 V or 4–20 mA configurable) and digital RS485 interface for PLC or SCADA connectivity.
- Pre-calibrated compatibility with the Leybold TR211 Pirani sensor—ensuring traceable performance aligned with ISO 3567:2017 (Vacuum technology — Vocabulary) and IEC 60068-2 environmental test standards.
- KF16 vacuum flange interface enables rapid, leak-tight mounting directly onto vacuum chambers, diffusion pump forelines, or sputtering systems without additional adapters.
- Temperature-compensated circuitry minimizes measurement deviation across ambient operating conditions from 0 °C to 40 °C.
- Front-panel push-button zeroing and span adjustment support field recalibration verification per user-defined reference points—facilitating routine QA/QC checks in production environments.
Sample Compatibility & Compliance
The ZDZ-1A is designed for use with dry, non-condensable, chemically inert gases including nitrogen, argon, helium, and air. It is not suitable for corrosive vapors (e.g., Cl₂, NH₃), solvent-laden atmospheres, or high-humidity environments without external gas conditioning. Its mechanical and electrical design conforms to CE marking requirements under the EU Electromagnetic Compatibility Directive 2014/30/EU and Low Voltage Directive 2014/35/EU. While the instrument itself does not carry ISO/IEC 17025 calibration certification, the TR211 sensor is supplied with factory calibration data traceable to PTB (Physikalisch-Technische Bundesanstalt) standards. For GLP/GMP-regulated facilities, users may implement periodic in-house verification using certified reference gauges per ASTM E2842–22 (Standard Practice for Verification of Vacuum Measurement Systems).
Software & Data Management
The ZDZ-1A supports Modbus RTU protocol over RS485, enabling seamless integration into industrial automation platforms such as Siemens SIMATIC, Rockwell Automation Logix, or LabVIEW-based monitoring systems. No proprietary software is required; configuration and real-time data logging can be achieved via standard terminal emulators or third-party SCADA tools. Audit trail functionality is not embedded in the device firmware, but when connected to validated supervisory systems compliant with FDA 21 CFR Part 11, electronic records—including timestamped pressure readings, alarm events, and calibration logs—can be generated with appropriate user access controls and electronic signatures.
Applications
- Rough vacuum monitoring in vacuum drying ovens, freeze dryers, and degassing chambers used in pharmaceutical and food processing.
- Process pressure supervision during physical vapor deposition (PVD), thermal evaporation, and plasma etching pre-pump-down phases.
- Leak testing setup verification and chamber evacuation validation in R&D laboratories and pilot-scale coating lines.
- Foreline pressure monitoring upstream of oil-sealed rotary vane pumps and dry scroll pumps in semiconductor tool maintenance workflows.
- Educational demonstrations of gas kinetics and thermal conduction behavior in undergraduate physics and materials science labs.
FAQ
What vacuum range does the ZDZ-1A cover?
It measures continuously from 1×10⁵ Pa (ambient atmospheric pressure) down to 1×10⁻¹ Pa—covering rough and low vacuum regimes typical of mechanical pump operation.
Is the TR211 sensor replaceable independently of the controller unit?
Yes—the TR211 is mounted via KF16 flange and electrically connected through a standardized 4-pin LEMO connector, allowing field replacement without soldering or firmware reconfiguration.
Does the ZDZ-1A meet NIST-traceable calibration requirements?
The unit ships with factory calibration documentation referencing PTB-traceable standards; end-users requiring NIST-traceable certificates must arrange third-party calibration services prior to deployment in regulated environments.
Can the ZDZ-1A be used in oxygen-rich or hydrogen atmospheres?
Operation in pure O₂ or H₂ is not recommended due to accelerated filament oxidation or embrittlement risks; consult Leybold’s TR211 technical datasheet for gas-specific derating guidelines.
What is the typical response time for pressure changes?
The system exhibits a 90% step response time of ≤1.5 seconds under stable thermal conditions, consistent with industry-standard Pirani gauge dynamics.
