ERAVISC X Portable Oscillating Viscometer & Density Meter by eralytics

Overview

The ERAVISC X is a dual-parameter, portable laboratory-grade instrument engineered for simultaneous or independent determination of kinematic viscosity and density in liquid samples—primarily lubricants, fuels, base oils, and synthetic fluids. It integrates two physically distinct, metrologically traceable measurement principles into a single compact platform: oscillating U-tube densitometry (per ASTM D4052 and ISO 12185) and dynamic capillary viscometry (per ASTM D445 and D7042). Unlike conventional rotational or falling-ball viscometers, the ERAVISC X employs a patented pressure-driven capillary flow method that correlates sample transit time with applied differential pressure—enabling high reproducibility without mechanical moving parts in the fluid path. Its Peltier-based thermal control system delivers precise, programmable temperature regulation from 15 °C to 100 °C with ramp rates up to ±20 °C/min—critical for viscosity index (VI) calculations requiring measurements at both 40 °C and 100 °C per ASTM D2270. The instrument’s all-aluminum corrosion-resistant housing and shock-absorbing internal architecture ensure operational integrity under field conditions—including mobile laboratories, refinery perimeters, and offshore platforms—while maintaining full compliance with ISO/IEC 17025-aligned calibration traceability.

Key Features

• True dual-parameter capability: Independent, concurrent, or sequential measurement of kinematic viscosity (1–1000 mm²/s) and density (0–3 g/cm³) using physically separate, optimized sensor cells
• Patented FillingProof™ technology: Real-time acoustic detection of micro-bubbles (<50 µm) during sample filling, eliminating density bias caused by entrapped air—essential for high-accuracy API gravity and VI determinations
• Top-loading, ambidextrous sample introduction: Minimizes operator error and cross-contamination risk; compatible with standard 10–15 mL sample vials
• Minimal sample consumption: Full viscosity + density analysis requires only 3 mL total—reducing waste, cost, and hazardous disposal burden
• Ultra-rapid analysis cycle: Kinematic viscosity result in ≤60 s; density in ≤15 s—enabling throughput of >30 tests/hour in routine QC environments
• Peltier-driven thermal control: Achieves stable setpoint temperatures within ±0.02 °C; supports multi-point temperature profiling for Arrhenius modeling and cold-flow simulation
• IP54-rated enclosure: Dust- and splash-resistant aluminum chassis designed for operation in ambient industrial environments (10–40 °C, 20–80% RH non-condensing)

Sample Compatibility & Compliance

The ERAVISC X is validated for Newtonian and mildly shear-thinning liquids with low volatility and no suspended solids—covering mineral oils, hydraulic fluids, transformer oils, jet fuels (Jet A-1, JP-8), biodiesel blends (B5–B20), and ethylene glycol–water antifreezes. It excludes highly viscous bitumens (>1000 mm²/s), polymer solutions exhibiting strong thixotropy, or samples containing particulates >5 µm. All measurement protocols are fully aligned with regulatory and quality frameworks: ASTM D445/D7042 for kinematic viscosity; ASTM D4052/D5002 and ISO 12185 for density and relative density; ISO 23581 for automated viscosity index calculation. Data output meets GLP/GMP documentation requirements, including full audit trail metadata (operator ID, timestamp, temperature log, fill validation status, and raw transit time/density oscillation period).

Software & Data Management

Instrument control and data acquisition are managed via eralytics’ PC-based ViscoSoft X software (Windows 10/11, 64-bit), which supports automated report generation compliant with ASTM reporting templates. Raw data—including pressure transients, oscillation decay curves, and thermal profiles—is stored in vendor-neutral CSV and XML formats. The software enforces user-level access control (administrator/operator/analyst roles), electronic signature capture, and 21 CFR Part 11–compliant audit trails with immutable timestamps. Calibration records, verification checks (e.g., NIST-traceable reference oils), and preventive maintenance logs are centrally archived and exportable for internal audits or regulatory inspections. Optional integration with LIMS via OPC UA or RESTful API enables seamless workflow automation in centralized QC laboratories.

Applications

• Routine quality control of finished lubricants and base stocks across manufacturing lines
• On-site verification of fuel specifications (e.g., ASTM D975, D1655) prior to blending or delivery
• Condition monitoring of in-service oils: detection of oxidation-induced viscosity increase, fuel dilution (via density deviation), or coolant contamination
• Research and development of low-viscosity synthetic esters and PAOs requiring precise density–viscosity correlation
• Educational use in university physical chemistry and petroleum engineering labs for teaching fundamental transport property relationships
• Third-party testing laboratories accredited to ISO/IEC 17025 seeking compact, standards-compliant alternatives to benchtop capillary viscometers and digital densimeters

FAQ

Does the ERAVISC X require annual recalibration?
Yes—annual traceable recalibration against NIST-certified reference materials is recommended. Factory calibration certificates include uncertainty budgets per ISO/IEC 17025.
Can it measure dynamic viscosity directly?
No—it measures kinematic viscosity (mm²/s) and density (g/cm³); dynamic viscosity (cP) is calculated internally using ρ × ν, with user-selectable unit conversion.
Is method validation support available for regulated industries?
Yes—eralytics provides IQ/OQ documentation packages, validation protocols aligned with ASTM E2500, and on-site qualification assistance for pharmaceutical and aerospace clients.
What sample preparation is required?
Samples must be filtered through a 5-µm syringe filter and degassed if volatile; no dilution or pre-heating is necessary—the instrument handles thermal equilibration autonomously.
How is temperature uniformity verified across the capillary and density cell?
Independent Pt100 sensors monitor both cells in real time; software cross-validates thermal gradients and aborts measurement if ΔT exceeds ±0.05 °C during analysis.