Aquamax KF PRO LPG Coulometric Karl Fischer Water Analyzer for Liquefied Petroleum Gas and Natural Gas
| Brand | ECH |
|---|---|
| Origin | Germany |
| Model | Aquamax KF PRO LPG |
| Application | Coulometric Karl Fischer titration for trace moisture determination in pressurized liquefied gases (LPG, LNG) and vapor-phase hydrocarbon streams |
| Detection Range | 0.1–1000 µg H₂O (equivalent to 0.1–500 ppmv in gas phase, depending on sample volume and density) |
| Sample Form | Liquid or vapor-phase, pressurized |
| Automation Level | Fully automated sample introduction, titration, rinsing, and method execution |
| Compliance | Designed per ISO 8573-3, ASTM D6304, ASTM D7429, and EN 15472 |
Overview
The Aquamax KF PRO LPG is a fully automated coulometric Karl Fischer (KF) water analyzer engineered specifically for the precise quantification of trace moisture in liquefied petroleum gas (LPG), liquefied natural gas (LNG), and other pressurized hydrocarbon gas streams. Unlike conventional volumetric KF systems, this instrument employs coulometric generation of iodine at the anode—enabling sub-microgram detection limits and exceptional reproducibility for low-water-content samples (<1 ppmv equivalent). The system operates on the principle of controlled electrochemical iodine generation, where water reacts stoichiometrically with iodine, sulfur dioxide, and base in methanol-based electrolyte. This reaction is governed by the Faraday law, ensuring absolute quantification without reliance on physical standardization. The instrument integrates pressure-regulated sample handling, direct injection into the titration cell, and real-time compensation for gas density and expansion—making it suitable for both liquid-phase sampling (e.g., from pressurized cylinders) and vapor-phase analysis (e.g., via regulated gas flow). Its design eliminates manual intervention across the entire analytical workflow, from sample introduction to result reporting.
Key Features
- Fully automated pressure-controlled sample delivery with integrated pressure regulation and safety interlocks for operation up to 20 bar (290 psi)
- Direct-injection sample line with built-in purge and rinse bypass—ensuring zero carryover between analyses
- Integrated desulfurization and particulate filtration cartridge to suppress side reactions caused by H₂S, mercaptans, and hydrocarbon condensates
- Membrane-free coulometric titration cell—requires only fresh electrolyte; no diaphragm maintenance or replacement
- Programmable method library supporting custom calculation formulas for unit conversion (µg, ppmv, v/v ppm, mol/mol ppm, and mass-based ppm)
- Self-contained rinse cycle using the same reagent reservoir—no external rinse gas or auxiliary solvent required
- No balance, no calibration standards, no daily recalibration: system relies on fundamental electrochemical measurement principles
- High throughput capability: up to 125 analyses per 24-hour period under continuous operation; validated for ≥250 analyses within 48 hours
- Compact benchtop footprint (W × D × H: 420 × 510 × 380 mm) with integrated waste management and sealed reagent handling
Sample Compatibility & Compliance
The Aquamax KF PRO LPG accepts liquefied and gaseous hydrocarbon samples—including propane, butane, propylene, ethane, methane, and mixed LPG/LNG streams—without matrix-specific method development. It complies with key international standards for moisture analysis in hydrocarbons: ASTM D6304 (Standard Test Method for Determination of Water in Petroleum Products by Coulometric Karl Fischer Titration), ASTM D7429 (Standard Test Method for Determination of Water in Liquefied Petroleum Gases (LPG) by Coulometric Karl Fischer Titration), ISO 8573-3 (Compressed air — Part 3: Determination of moisture content), and EN 15472 (Liquid petroleum products — Determination of water content — Coulometric Karl Fischer titration method). The system architecture supports 21 CFR Part 11-compliant data handling when paired with the optional Aquadata Professional software suite, enabling electronic signatures, user access control, and immutable audit trails required for GLP and GMP environments.
Software & Data Management
Control and data acquisition are managed via the Aquadata Professional software platform (Windows-based, USB or Ethernet interface). The software provides full method editor functionality—including step sequencing for pressurization, injection, titration, post-rinse, and cell stabilization. All raw coulometric current/time curves, endpoint detection logic, and calculated results are stored with timestamp, operator ID, and instrument configuration metadata. Data export options include CSV, PDF report generation, and direct integration with LIMS via ODBC or OPC UA protocols. Audit trail functionality records all user actions—including method modifications, result overrides, and system configuration changes—with tamper-proof hashing. Optional IQ/OQ documentation packages are available for laboratory validation under ISO/IEC 17025 and pharmaceutical quality systems.
Applications
This analyzer is deployed in refinery laboratories, gas trading hubs, LNG terminal QC labs, and petrochemical R&D facilities for critical moisture monitoring tasks: verification of dehydration efficiency in amine treaters and molecular sieve dryers; specification compliance testing prior to pipeline injection or marine loading; troubleshooting of hydrate formation risk in upstream gathering systems; and stability assessment of lubricants and specialty solvents exposed to LPG/LNG handling infrastructure. Its robustness against sulfur compounds and condensed hydrocarbons makes it particularly suited for field-deployable or skid-mounted installations where maintenance intervals must be extended and operator dependency minimized.
FAQ
Does the Aquamax KF PRO LPG require daily calibration with certified water standards?
No. As a coulometric KF system, it performs absolute quantification based on Faraday’s law; no external calibration is necessary.
Can it analyze samples containing hydrogen sulfide (H₂S)?
Yes—the integrated desulfurization cartridge removes H₂S and reactive sulfur species prior to titration, preventing iodine consumption unrelated to water.
Is operator training required to achieve repeatable results?
Minimal training is required; the system executes pre-programmed methods autonomously, with only routine electrolyte replenishment and cartridge replacement needed.
What is the typical electrolyte lifetime under continuous operation?
Under standard operating conditions (100–125 tests/day), the coulometric electrolyte remains stable for ≥7 days without performance drift.
Does the instrument support remote diagnostics or preventive maintenance alerts?
Yes—via Ethernet-connected Aquadata Professional software, users can monitor cell impedance, electrode health, and reagent saturation status in real time.
