eralytics has expanded the technical capabilities of its eraspec oil, a portable, stand-alone FTIR lubricant analyzer. Designed to deliver laboratory-grade precision directly to on-site environments, the analyzer utilizes a fully automated, solvent-free workflow with an integrated sample pump. To address increasingly demanding field requirements, we have introduced three advanced hardware and software features designed to enhance trace-level detection, water quantification, and rapid product verification.
Triple-Cell Design: The hardware integrates an additional 500 µm measurement cell alongside the standard 100 µm cell and a built-in reference cell. This dual-path-length configuration improves the Limit of Detection (LOD) for antioxidant additives (such as AO Phenol), water, and ester. The analyzer’s software automatically calculates and reports the result using the 500 µm cell when concentrations fall below a standard threshold.
Chemometric Water Quantification: To prevent spectral overlaps from oil oxidation products and additives, the analyzer implements a chemometric model calibrated against ASTM D6304-B Karl Fischer oven titration. The model utilizes specific spectral regions to mathematically isolate water absorption. For water concentrations of 50 ppm or higher, this doubles analytical performance compared to direct FTIR methods, providing results in under two minutes.
Automated Fingerprinting: FTIR spectral matching using the eraspec oil analyzers provides an objective method for the positive product identification of fresh lubricating oils. This capability verifies an unknown lubricant’s unique molecular fingerprint by cross-referencing its spectrum against a comprehensive on-board reference database. The analytical process relies on a matching algorithm that calculates a Pearson correlation coefficient to determine the optimal product match. This new feature was developed to enhance process reliability and optimize incoming goods inspections.