The Lubricating Oil Evaporation Loss Tester is a specialized analytical instrument designed to measure the mass loss of lubricating oils when exposed to elevated temperatures. It is manufactured in strict accordance with the SH/T0059 test method (Method B – Automatic operation mode) and is particularly suitable for evaluating the evaporation behavior of internal combustion engine oils as well as various lubricating base oils at a controlled test temperature of 250°C.
This parameter is critical for assessing oil consumption trends, high-temperature stability, and volatile loss during service, directly impacting oil change intervals and engine cleanliness.
The tester adopts a modular, split-unit design for enhanced flexibility and ease of maintenance. The main components include:
Metal bath heating system – provides stable and uniform thermal energy to the evaporation assembly
Temperature control system – maintains precise thermal conditions throughout the test cycle
Constant airflow and vacuum pressure system – ensures reproducible test atmosphere per method requirements
The evaporation bath itself is machined from high-grade aluminum alloy. An aluminum heating belt operates in close conjunction with Wood's alloy (a low-melting-point metal alloy) to create exceptionally uniform heat distribution across the entire bath volume. This design eliminates localized overheating and improves test repeatability.
High-performance thermal insulation materials encase the heating zone, reducing heat loss to the surroundings, improving energy efficiency, and extending the service life of critical components.
A dedicated vacuum control assembly is integrated into the instrument, comprising:
Precision pressure control instrument – real-time monitoring and adjustment
Oil-free vacuum pump – clean, maintenance-reduced operation
Pressure stabilizing buffer bottle – dampens pressure fluctuations, ensuring a steady vacuum environment
This configuration guarantees that the inclined tube pressure remains stable at the required level throughout the evaporation period.
The automatic control system is built around a microcontroller (MCU) core, which performs the following functions without operator intervention:
Automatic temperature ramp-up and stabilization at 250°C
Precise test timing as specified in SH/T0059 Method B
Scheduled alarm triggering at defined intervals
Automatic control and cut-off of the vacuum pump system
User interaction is handled through a sensitive touchscreen panel, replacing traditional physical buttons. This enables clear, real-time display of test parameters, intuitive menu navigation, and straightforward setup. Operators can monitor the current bath temperature, elapsed time, and system status at a glance.
| Parameter | Value / Range |
|---|---|
| Power supply | AC220V ±10%, 50Hz |
| Heating power | 1200 W |
| Temperature control range | Ambient (room temperature) to 250°C |
| Temperature control accuracy | ±0.5°C |
| Inclined tube pressure | 196 ± 2 Pa |
| Timing method | Automatic (microcontroller) |
| Display interface | Touchscreen (LCD) |
| Evaporation bath material | Aluminum alloy + Wood's alloy |
| Insulation layer | High-temperature resistant thermal insulation material |
Our organization brings decades of hands-on expertise in the field of petroleum product testing, with a specific focus on evaporation loss measurement. Unlike general-purpose instrument suppliers, we focus exclusively on this niche, allowing us to understand the subtle but critical factors that affect test results – from draft variations to vacuum integrity.
Our engineering team includes professionals who have worked directly with refinery laboratories, third-party testing centers, and OEM quality assurance departments. This background enables us to provide:
Tailored training – not just generic operation, but application-specific guidance
Responsive maintenance – quick turnaround and spare parts availability
Deep technical support – troubleshooting based on real-world lab scenarios
By incorporating unique design features (such as the Wood's alloy uniform heating layer and the stabilized buffer tank), we deliver higher testing efficiency, better data accuracy, and superior long-term reliability compared to conventional designs.
Dalian Analytical Instrument Factory is a dedicated manufacturer of petroleum analytical instruments with nearly forty years of continuous production experience. Over this period, we have built:
Complete sets of modern production equipment and precision testing tools
A strong technical workforce with deep domain knowledge
A diverse product portfolio spanning over 100 models and specifications
We are widely recognized as one of the manufacturers offering the broadest variety of petroleum analysis instruments in China. Our product range includes evaporation loss testers, cooling performance testers, and many other specialized devices for fuel, lubricant, and base oil analysis.
Our instruments are currently used by customers across domestic and international markets, including oil refineries, additive companies, third-party laboratories, and government inspection agencies. We take pride in our reputation for build quality, measurement consistency, and long-term durability.
If you have any interest in our Lubricating Oil Evaporation Loss Tester, please do not hesitate to contact us for a detailed technical discussion, product quotation, or customized configuration. Our team is ready to answer your questions in depth. We are confident that our high-quality oil tester will meet or exceed your performance expectations.
