PULUODY PLD-CX-a Portable Gasoline Octane and Diesel Cetane Analyzer
| Brand | PULUODY |
|---|---|
| Origin | Shaanxi, China |
| Manufacturer Type | Direct Manufacturer |
| Regional Classification | Domestic (China) |
| Model | PLD-CX-a |
| Measurement Parameters | Gasoline Research Octane Number (RON), Diesel Cetane Number (CN) |
| Portability | Handheld |
| Measurement Range | 40–120 (RON/CN scale) |
| Accuracy | ±0.5 RON/CN |
| Measurement Time | ≤10 seconds |
| Sample Volume Required | 10 mL |
| Operating Environment | 0–30 °C, ≤85% RH |
| Repeatability | ±0.2 RON |
| Reproducibility | ±0.4 RON |
| Resolution | 0.1 RON/CN |
| Response Time | <1 s |
| Power Input | 100–240 VAC, 50/60 Hz |
| DC Output | 5 VDC / 1000 mA |
| Compliance Standard | GB/T 18339–2001 (Gasoline Octane Determination by Dielectric Constant Method) |
Overview
The PULUODY PLD-CX-a Portable Gasoline Octane and Diesel Cetane Analyzer is a handheld, field-deployable instrument engineered for rapid, on-site determination of Research Octane Number (RON) in gasoline and Cetane Number (CN) in diesel fuels. It operates on the principle of dielectric constant measurement—a non-destructive, physics-based method standardized in GB/T 18339–2001—where fuel composition directly influences its permittivity, enabling quantitative correlation to hydrocarbon knock resistance (RON) or ignition quality (CN). Unlike laboratory-based ASTM D2699 (RON) or ASTM D613 (CN) methods requiring engine testing, the PLD-CX-a delivers traceable, repeatable results without combustion, calibration gases, or solvent handling. Its compact architecture supports integration into mobile fuel inspection units, refinery gate labs, roadside compliance checks, and terminal quality assurance workflows where time-to-result and operational mobility are critical.
Key Features
- Handheld ergonomic design with integrated rechargeable battery support (via 5 VDC input), enabling continuous operation during multi-site inspections without external power dependency.
- Dual-parameter capability: simultaneous RON and CN estimation calibrated against reference fuel standards per GB/T 18339–2001 and aligned with empirical correlations to ASTM D976 and ISO 4264.
- High-speed electrochemical sensor array with proprietary dielectric transduction technology, delivering full-scale measurement in ≤10 seconds with <1-second real-time response latency.
- On-device microprocessor (CPU-based firmware) performs automatic temperature compensation (0–30 °C operating range) and humidity correction (≤85% RH), minimizing environmental drift.
- Factory-calibrated with NIST-traceable reference fuels; user-accessible two-point calibration routine ensures long-term metrological integrity without external service intervention.
- Ruggedized housing rated IP54 for dust and splash resistance, suitable for use in fuel terminals, depots, and transport refueling zones.
Sample Compatibility & Compliance
The PLD-CX-a accepts undiluted, homogenous liquid hydrocarbon samples—gasoline blends (including ethanol-gasoline E10/E15), reformulated gasoline, and middle-distillate diesel fuels (EN 590, ASTM D975 compliant). It excludes highly viscous or water-contaminated samples (>0.1% v/v free water), which may affect dielectric signal fidelity. The analyzer conforms to GB/T 18339–2001 for gasoline octane assessment and supports data traceability required under China’s GB 17930 and GB 19147 fuel quality regulations. While not a primary reference method per ASTM or ISO, its performance metrics (repeatability ±0.2 RON, reproducibility ±0.4 RON at 95% confidence) meet QC screening thresholds defined in ISO 4214 and internal refinery specifications for incoming fuel verification.
Software & Data Management
Data acquisition and reporting are managed via embedded firmware with local storage for up to 1,000 test records, each timestamped and tagged with ambient temperature/humidity metadata. USB-C interface enables secure export of CSV-formatted reports compatible with LIMS platforms. Audit trails—including operator ID (configurable), calibration logs, and firmware version—are retained and exportable to satisfy GLP-aligned documentation requirements. No cloud connectivity or remote telemetry is implemented, preserving data sovereignty—a key consideration for regulated fuel supply chains subject to national cybersecurity policies.
Applications
- Real-time verification of gasoline octane grade at retail service stations and wholesale distribution points.
- Pre-delivery quality screening of diesel batches prior to offloading at marine terminals or inland depots.
- Field validation of fuel adulteration (e.g., kerosene dilution, solvent blending) through deviation analysis from expected dielectric signatures.
- Supporting regulatory audits under China’s Market Supervision Administration (SAMR) fuel quality enforcement protocols.
- Integration into mobile fuel inspection vehicles operated by provincial commodity inspection bureaus (CIQ) and customs laboratories.
FAQ
Does the PLD-CX-a require certified reference fuels for daily operation?
No—factory calibration remains stable for ≥6 months under normal use. Reference fuel verification is recommended quarterly or after exposure to extreme thermal cycling.
Can it measure motor octane number (MON)?
No—it is optimized for RON and CN only. MON determination requires separate engine-based testing per ASTM D2700.
Is the device compliant with FDA 21 CFR Part 11 or EU Annex 11?
It does not implement electronic signature or role-based access control; therefore, it is intended for non-GxP environments such as commercial fuel QA/QC—not pharmaceutical excipient testing.
What maintenance is required beyond calibration?
Sensor cleaning with anhydrous isopropanol every 200 measurements and visual inspection of sample chamber seals every 6 months.
How is measurement uncertainty quantified?
Total expanded uncertainty (k=2) is ±0.5 RON/CN, derived from repeatability, reproducibility, temperature sensitivity, and reference standard uncertainty per ISO/IEC 17025 guidance.
