ERALYTICS ERADENS XS Portable Oscillating U-Tube Density Meter

Overview

The ERALYTICS ERADENS XS is a high-precision portable oscillating U-tube density meter engineered for rapid, traceable liquid density determination in field, laboratory, and production environments. Based on the fundamental physical principle of resonant frequency shift—where the oscillation period of a precisely machined U-shaped glass tube filled with sample correlates directly to its density—the instrument delivers metrologically traceable results compliant with international standards including ASTM D4052 (standard test method for density, relative density, and API gravity of liquids by digital density meter), ASTM D5002 (for crude oils), ASTM D5931 (for biodiesel), ISO 12185 (crude oil and petroleum products), and SH/T 0604 (Chinese standard for petroleum products). Its compact form factor, integrated rechargeable battery, and wireless connectivity enable uninterrupted operation without external power—ideal for mobile QC checks at refinery terminals, fuel depots, R&D labs, or offshore platforms.

Key Features

• Ultra-compact design: Total weight—including internal Li-ion battery—is only 2.1 kg, enabling one-handed transport and benchtop deployment in space-constrained locations.
• High-speed measurement: Full density result with five-decimal-place resolution (0.00005 g/cm³) delivered in ≤15 seconds after sample injection.
• Top-loading sample port: Ergonomically optimized for ambidextrous use; accommodates both right- and left-handed operators without repositioning.
• Integrated temperature-controlled measurement cell: Maintains thermal equilibrium across 10–60 °C with ±0.01 °C stability, ensuring compliance with standard-specified thermal conditioning requirements.
• Wireless data transmission: Bluetooth 5.0 interface supports secure, encrypted pairing with iOS and Android devices for real-time result viewing, annotation, and export via the dedicated ERADENS Connect app.
• Robust mechanical architecture: Housing rated IP54 for dust and splash resistance; borosilicate glass U-tube with proprietary surface treatment ensures long-term stability and chemical compatibility with hydrocarbons, alcohols, esters, and aqueous solutions.

Sample Compatibility & Compliance

The ERADENS XS is validated for homogeneous, low-viscosity liquids within the specified density range (0–3 g/cm³), including but not limited to gasoline, diesel, jet fuel (Jet A-1, JP-8), biodiesel (B100), ethanol blends (E10, E85), lubricating base oils, crude assay fractions, and solvent-based formulations. It excludes suspensions, emulsions, or highly viscous fluids (>100 mPa·s) that may impede complete tube filling or dampen oscillation amplitude. All measurements are fully traceable to NIST- or PTB-calibrated reference standards. The device meets the essential performance criteria defined in ASTM D4052 Section 7 (precision and bias), ISO 12185 Annex B (repeatability limits), and supports audit-ready documentation required under GLP and GMP frameworks when used with enabled electronic signature and audit trail functions in the companion software.

Software & Data Management

The ERADENS Connect application provides full instrument control, calibration management, and data governance. Users can perform single-point or multi-point calibration using certified reference materials (e.g., air/water or n-hexadecane/ethanol mixtures), store up to 1,000 measurement records locally on-device, and export CSV or PDF reports with embedded metadata (operator ID, timestamp, ambient temperature, calibration status). The software enforces 21 CFR Part 11–compliant user access levels (administrator, operator, reviewer), automatic electronic signatures, and immutable audit logs—ensuring data integrity for regulated environments such as fuel certification labs or pharmaceutical excipient testing facilities.

Applications

• On-site verification of fuel density prior to custody transfer or blending operations.
• Rapid screening of distillation fractions during crude assay workflows.
• Quality control of biofuel blends (e.g., FAME, HVO) per EN 14214 or ASTM D6751 specifications.
• Concentration monitoring of aqueous glycol or acid solutions in heat transfer or process chemistry applications.
• Research-grade density profiling of novel ionic liquids or low-molecular-weight polymer solutions.
• Field validation of handheld hydrometer readings where higher accuracy and temperature compensation are critical.

FAQ

What standards does the ERADENS XS comply with?
ASTM D4052, ASTM D5002, ASTM D5931, ISO 12185, and SH/T 0604—all verified through third-party type evaluation and factory calibration certificates.
Can it measure samples below 10 °C or above 60 °C?
No. The built-in Peltier temperature control system is designed exclusively for the 10–60 °C operating range; measurements outside this interval violate standard-compliant methodology and invalidate traceability.
Is cleaning required between different sample types?
Yes. A two-step rinse protocol (first with compatible solvent, then with dry air purge) is mandatory to prevent cross-contamination and preserve U-tube integrity—detailed in the operator manual’s maintenance section.
Does the device support external power while operating?
Yes. The unit accepts 12–24 V DC input via the optional power adapter; however, battery operation remains active during charging, ensuring zero measurement interruption.
How is calibration traceability documented?
Each instrument ships with a factory calibration certificate referencing NIST-traceable standards, and users may generate new calibration reports with digital signatures and timestamps via ERADENS Connect.