NOACK Volatile Loss Tester for Lubricating Greases and Oils (DIN 51581 Compliant)
| Origin | Switzerland |
|---|---|
| Manufacturer Type | Authorized Distributor |
| Origin Category | Imported |
| Model | NOACK Method |
| Price | Upon Request |
Overview
The NOACK Volatile Loss Tester is a precision-engineered benchtop instrument designed to quantify the evaporation loss of lubricating greases and oils under controlled high-temperature conditions, in strict accordance with DIN 51581 (equivalent to ASTM D5800 and ISO 2592). This test method evaluates volatility by heating a precisely weighed sample at 250 °C for 60 minutes under atmospheric or optionally reduced pressure, then measuring mass loss as a percentage of the original weight. The measurement principle relies on gravimetric analysis following standardized thermal exposure—critical for assessing base oil volatility, formulation stability, and long-term performance in high-temperature applications such as engine oils, gear lubricants, and automotive greases. The system integrates thermally isolated aluminum heating blocks, calibrated Pt100 RTD sensing, and PID-controlled temperature regulation to ensure repeatability within ±0.5 °C across the full operating range (ambient to 250 °C).
Key Features
- Benchtop architecture with fully insulated aluminum heating block and jacketed sample holder accommodating standard stainless steel crucibles with matching chromium-plated copper lids
- Compliant lid assembly featuring a 3.5 mm test ball and precision-machined screw clamp per DIN 51581 specifications
- Digital microprocessor-based temperature controller with PID algorithm and real-time display; Pt100 RTD probe embedded in heating block for traceable thermal feedback
- Integrated 60-minute programmable timer with audible alarm signaling test completion
- Complete condensation train: 3 L Woulff bottle with ceramic-coated stainless steel fittings, stopcock, U-tube manometer, buffer flask, and reinforced rubber tubing—all rigidly mounted on structural frame
- Optional vacuum pump (D51581-A02) enables testing under sub-atmospheric conditions per modified NOACK protocols
- CE-marked design compliant with IEC 61010-1 safety standards for laboratory electrical equipment
- 1500 W heating capacity operating at 220 V / 50 Hz; thermal insulation ensures minimal ambient heat dissipation
Sample Compatibility & Compliance
This instrument accommodates both lubricating oils and NLGI-grade greases, including lithium-, calcium-, and polyurea-thickened formulations. Sample volume is standardized at 60 g (±0.1 g) per DIN 51581, placed in supplied stainless steel crucibles (D51581-A00). All wetted components—including crucible, lid, Woulff bottle, and condensate receiver—are chemically inert and corrosion-resistant. The system supports GLP-compliant workflows through optional data logging (D51581-A01), which records temperature and pressure traces on 100 mm chart paper with timestamped output. Calibration traceability is maintained via certified PT100 simulators (CAL001/CAL002), enabling verification against national metrology standards. The methodology satisfies regulatory requirements for volatility assessment under ASTM D5800, ISO 2592, and JIS K 2220.
Software & Data Management
While the base unit operates without software dependency—ensuring robustness and audit readiness—the optional D51581-A01 data recorder provides analog chart-based documentation suitable for 21 CFR Part 11–aligned environments when paired with manual signature logs and controlled record retention. The chart recorder captures dual-channel inputs (temperature and system pressure), with resolution sufficient to resolve deviations ≥1 °C and ≥1 kPa. All printed outputs include instrument ID, operator initials, date/time stamp, and test duration—facilitating integration into existing QA/QC documentation systems. Optional calibration accessories (CAL001/CAL002) support periodic verification of temperature sensor linearity and accuracy, fulfilling internal calibration SOPs aligned with ISO/IEC 17025 Clause 6.5.
Applications
- Quality control of finished lubricants during manufacturing and batch release
- R&D evaluation of base oil volatility and additive package thermal stability
- Formulation screening for high-temperature grease applications (e.g., wheel bearing, chassis, and industrial gear lubricants)
- Third-party certification testing for OEM specifications (e.g., GM 6277M, Ford WSS-M2C945-A, VW TL 521 82)
- Regulatory compliance testing for CE-marked lubricant products sold in the European Economic Area
- Failure analysis of in-service lubricants exhibiting excessive thinning or viscosity drop
FAQ
What standards does this instrument comply with?
DIN 51581, ASTM D5800, ISO 2592, and JIS K 2220.
Is vacuum operation supported out of the box?
Vacuum capability requires the optional D51581-A02 vacuum pump and associated pressure regulation components.
Can the system be used for both oils and greases?
Yes—validated for NLGI grades 000 through 3 and mineral/synthetic base oils meeting ASTM D445 viscosity ranges.
What is the temperature accuracy specification?
±0.5 °C over the full 250 °C range, verified using traceable Pt100 reference probes.
Are consumables included with the base unit?
No—Woulff bottles (D51581-C01), absorbent flasks (D51581-C02), and chart paper (D51581-C00) are ordered separately.
Does the instrument meet FDA or pharmaceutical regulatory requirements?
While not designed for direct pharma use, its GLP-supporting data logging and calibration traceability align with general laboratory quality system expectations for non-clinical testing environments.
