Linetronic 615 Automated Grease Penetrometer
| Brand | Linetronic |
|---|---|
| Origin | Switzerland |
| Model | 615 |
| Temperature Control Range | 5–35 °C |
| Temperature Stability | ±0.1 °C |
| Penetration Resolution | 0.1 mm |
| Maximum Penetration Depth | 75 mm |
| Standard Compliance | ASTM D5, D217, D937, D1321, D1403, D1831, D2884 |
Overview
The Linetronic 615 Automated Grease Penetrometer is a precision-engineered instrument designed for standardized determination of consistency in lubricating greases, petroleum waxes, and semi-solid bituminous materials. Based on the fundamental principle of cone penetration—where a standardized cone of defined mass and geometry is allowed to descend into a sample under gravity for a fixed duration (typically 5 seconds)—the system delivers repeatable, traceable, and metrologically robust measurements in accordance with internationally recognized test methods. Developed and manufactured in Switzerland, the 615 model integrates thermally stabilized sample conditioning, electromechanical actuation, and embedded real-time data acquisition to meet the stringent requirements of QC laboratories in refineries, lubricant formulation centers, and third-party testing facilities operating under ASTM, ISO, and Chinese national standards.
Key Features
- Thermally regulated test chamber with integrated refrigeration unit, enabling precise temperature control from 5 °C to 35 °C at ±0.1 °C stability—critical for evaluating temperature-dependent rheological behavior of greases.
- Motorized positioning head combined with manual fine-adjustment gear mechanism ensures accurate alignment of the penetration cone over the sample surface prior to measurement.
- Stainless-steel conical penetrometer (ASTM/IP compliant, total mass 2.5 g) and standard grease cone (47.5 g total mass) both equipped with an electronic mechanical locking system that secures position during pre-test thermal equilibration and releases automatically upon initiation.
- 75 mm maximum vertical travel range accommodates full-depth penetration across low-, medium-, and high-consistency samples without mechanical interference.
- Rigid aluminum base plate with built-in spirit level and adjustable leveling screws ensures long-term mechanical stability and horizontal alignment—essential for minimizing gravitational vector error.
- Integrated 10.1-inch TFT/LCD touchscreen interface (1280 × 700 resolution, 16M color depth) with 49 GB internal SSD storage, dual USB ports for peripheral connectivity (e.g., thermal printers, flash drives), and embedded Windows-based control software.
Sample Compatibility & Compliance
The Linetronic 615 is validated for use with NLGI-grade lubricating greases, asphalt binders, petroleum jellies, and other semi-solid hydrocarbon-based materials. Its mechanical design and operational parameters strictly conform to ASTM D217 (standard grease penetration), ASTM D5/D937 (bituminous materials), ISO 2137 (petroleum products—penetration of lubricating grease), and GB/T 269–1991 (Chinese standard for grease consistency). The instrument supports GLP-compliant workflows through timestamped measurement logging, operator ID input, and audit-ready data export (CSV, PDF). Optional integration with LIMS environments is supported via USB or network-enabled data transfer protocols.
Software & Data Management
The embedded software enables fully automated test sequences—including programmable dwell time (pre-penetration thermal stabilization), penetration duration (default 5 s per ASTM), and post-measurement hold. All parameters are user-configurable and stored with metadata (date/time, operator ID, ambient temperature, bath temperature, sample ID). Measurement results—including penetration depth in 0.1 mm increments—are displayed in real time and archived with traceable calibration records. Data exports support regulatory review and quality documentation requirements under ISO/IEC 17025 and FDA 21 CFR Part 11 (when used with electronic signature modules and access-controlled user accounts).
Applications
- Quality control of finished lubricating greases across NLGI grades 000–6.
- Batch release testing in OEM lubricant manufacturing facilities.
- Research into thickener–base oil interactions and shear stability assessment.
- Conformance verification of specialty greases for aerospace, railway, and wind turbine applications.
- Comparative analysis of temperature-induced softening behavior (e.g., dropping point correlation studies).
- Supporting ASTM D1403 (worked penetration) and D1831 (extended working) procedures when paired with standardized grease workers.
FAQ
Does the Linetronic 615 support both unworked and worked grease penetration tests?
Yes—the instrument is compatible with ASTM D217 (unworked), D1403 (worked), and D1831 (extended working) protocols when used in conjunction with certified grease workers and appropriate sample preparation procedures.
Can external temperature baths be connected to the 615 system?
Yes—two dedicated ports allow connection to external recirculating chillers or water baths for extended thermal range validation or method-specific cooling requirements beyond the internal refrigeration limit of 10 °C.
Is calibration traceable to national metrology institutes?
All factory calibrations are performed using NIST-traceable depth gauges and certified reference cones; calibration certificates include uncertainty budgets compliant with ISO/IEC 17025 requirements.
What safety and maintenance features are built into the system?
The instrument includes automatic cone retraction after measurement, emergency stop button, thermal overload protection for the refrigeration module, and self-diagnostic routines accessible via the main menu.
How is data integrity ensured during long-term deployment in regulated environments?
The system logs all user actions, parameter changes, and measurement events with digital timestamps and immutable file attributes; optional 21 CFR Part 11 compliance packages include role-based access control, electronic signatures, and audit trail export functionality.
