Chengyi ZDZ-1J Pirani Vacuum Gauge
| Brand | Chengyi |
|---|---|
| Origin | Sichuan, China |
| Manufacturer Type | Authorized Distributor |
| Country of Origin | China |
| Model | ZDZ-1J |
| Measurement Principle | Thermal Conductivity (Pirani) |
| Pressure Range | 1.0 × 10⁵ Pa to 1.0 × 10⁻¹ Pa (Atmosphere to 0.1 Pa) |
| Vacuum Port | KF16 |
| Display | TFT Touchscreen Interface |
| Processor | ARM Cortex-M3 |
| Accuracy | ±20% of reading |
| Standard Gauge Tube | CY-1Z Pirani Sensor (KF16 flange) |
| Cable Length | 3 m |
| Dimensions (H×W×D) | 103 × 120 × 155 mm |
| Weight | ~2.0 kg |
| Power Supply | AC 220 V ±10%, 50 Hz |
| Optional Outputs | 0–10 V analog output |
Overview
The Chengyi ZDZ-1J Pirani Vacuum Gauge is a compact, microprocessor-controlled thermal conductivity vacuum measurement instrument engineered for reliable and repeatable pressure monitoring in low-vacuum (rough vacuum) environments. Operating on the well-established Pirani principle—where gas thermal conductivity is correlated to pressure—the ZDZ-1J measures heat loss from a heated filament under varying ambient gas densities. This method provides stable, real-time readings across its calibrated range from atmospheric pressure (1.0 × 10⁵ Pa) down to 1.0 × 10⁻¹ Pa (0.1 Pa), making it suitable for applications such as vacuum drying ovens, packaging systems, vacuum furnaces, freeze dryers, and general-purpose laboratory vacuum lines where high-end ionization or capacitance manometers are unnecessary. The gauge integrates an ARM Cortex-M3 microcontroller, enabling fast response times (<1 s typical), enhanced digital filtering, and robust noise immunity in electrically noisy industrial settings.
Key Features
- High-resolution 4.3-inch TFT touchscreen interface with intuitive menu navigation and real-time pressure trend display
- Embedded ARM Cortex-M3 processor delivering deterministic timing, low-latency signal processing, and improved algorithmic compensation for ambient temperature drift
- Factory-calibrated CY-1Z Pirani sensor with KF16 vacuum flange interface—designed for long-term stability and minimal zero drift
- Compact housing (103 × 120 × 155 mm) constructed from reinforced ABS with IP20-rated front panel; optimized for benchtop or panel-mount installation
- Standard 3-meter shielded cable with integrated sensor power and signal lines—minimizing EMI coupling and ensuring signal integrity
- Configurable analog output (0–10 V DC, linear with log-pressure scale) and optional RS485 Modbus RTU interface for integration into SCADA, PLC, or centralized vacuum monitoring systems
- Compliant with IEC 61000-6-2 (immunity) and IEC 61000-6-4 (emission) standards for industrial environments
Sample Compatibility & Compliance
The ZDZ-1J is compatible with common process gases including nitrogen, air, argon, oxygen, and carbon dioxide. It is not recommended for use with condensable vapors (e.g., water, solvents) or reactive gases (e.g., chlorine, ammonia) without protective filters or cold traps, as these may contaminate or degrade the sensor filament. Calibration is traceable to national standards via Chengyi’s internal metrology lab, and the instrument meets general requirements for ISO/IEC 17025-aligned calibration practices. While not certified to FDA 21 CFR Part 11 or GMP Annex 11 out-of-the-box, its RS485 interface supports audit-ready data logging when paired with validated third-party software meeting ALCOA+ principles.
Software & Data Management
An optional Windows-based configuration and data acquisition software is available for the ZDZ-1J via RS485. The software enables remote parameter setup (e.g., damping time, unit selection, analog scaling), real-time graphing, CSV export, and scheduled data capture at user-defined intervals (1 s to 60 min). All logged records include timestamps, sensor ID, and environmental status flags. For integration into regulated environments, the software can be configured to generate electronic logs with operator identification and change history—supporting basic GLP documentation workflows. Firmware updates are delivered via USB-to-RS485 adapter and require no hardware modification.
Applications
- Monitoring vacuum levels in industrial vacuum packaging lines (food, pharmaceutical, electronics)
- Process control in vacuum-assisted resin transfer molding (VARTM) and composite curing ovens
- Quality assurance in lyophilizer (freeze dryer) chamber evacuation cycles
- Routine verification of rough vacuum performance in diffusion pump forelines and mechanical pump inlet stages
- Educational labs requiring cost-effective, durable vacuum instrumentation for undergraduate physics and engineering courses
- Pre-vacuum checks prior to high-vacuum system activation (e.g., before turbomolecular pump start-up)
FAQ
What gases can the ZDZ-1J accurately measure?
The ZDZ-1J is calibrated for dry air and nitrogen. For other gases—including argon, oxygen, CO₂, or helium—pressure readings require gas-specific correction factors, which are provided in the technical manual.
Is the CY-1Z sensor replaceable in the field?
Yes. The CY-1Z Pirani sensor is a modular component with standardized KF16 mounting and plug-in electrical connector, allowing for quick replacement without recalibration if using a factory-matched unit.
Does the gauge support automatic unit switching (Pa, mbar, Torr)?
Yes. The touchscreen interface allows users to select preferred pressure units; all conversions are performed internally using NIST-traceable conversion constants.
Can the ZDZ-1J operate continuously at atmospheric pressure?
Yes. The sensor and electronics are rated for indefinite operation at ambient pressure; no damage occurs during venting or startup sequences.
What is the recommended recalibration interval?
Chengyi recommends annual calibration for routine industrial use; laboratories operating under ISO/IEC 17025 should establish interval based on usage frequency, historical stability data, and risk assessment.
