Carbon residue is a key parameter used to evaluate the tendency of petroleum products to form coke deposits under high-temperature conditions. This method measures the mass percentage of carbonaceous residue remaining after controlled evaporation and thermal decomposition of the sample.

In this test, the petroleum sample—such as lubricating oil or heavy fuel oil—is heated in an electric furnace under specified conditions until volatile components are evaporated and carbonaceous residue remains. The final residue is weighed to determine the carbon residue content.

Compared with the micro carbon residue method (ASTM D4530), the Conradson method is a traditional and widely recognized testing procedure, particularly suitable for heavy petroleum products and residual fuels.

This instrument features compact structure, low power consumption, digital temperature control, and reliable operation, making it suitable for routine laboratory testing.

The Conradson Carbon Residue Analyzer is used to determine the carbon residue content of petroleum products and heavy oils.

• Lubricating oils
• Heavy fuel oils
• Residual oils
• Petroleum distillation residues
• Industrial fuel oils

Typical application environments include:

• Petroleum refineries
• Petrochemical plants
• Fuel testing laboratories
• Metallurgical industry laboratories
• Research institutes and universities

The instrument adopts a standard electric furnace heating system, ensuring stable and uniform heating conditions for carbon residue testing.

A digital temperature controller provides clear temperature display and precise temperature regulation, improving operational convenience.

The system maintains a constant temperature at 520°C ±5°C, meeting standard test requirements.

The instrument is equipped with a four-hole bath structure, allowing multiple samples to be tested simultaneously.

The instrument features low power consumption, stable performance, and safe operation, suitable for continuous laboratory use.

This Petroleum Carbon Residue Analyzer is designed according to:

• ASTM D189 – Standard Test Method for Conradson Carbon Residue of Petroleum Products
• SH/T 0170 – Test Method for Carbon Residue of Petroleum Products (Electric Furnace Method)

These standards are widely used for evaluating the coking tendency of heavy petroleum products and residual fuels.

Reliable Traditional Carbon Residue Testing

Provides accurate determination of carbon residue content using the Conradson method.

Stable Electric Furnace Heating

Ensures uniform heating and consistent test conditions.

Simple and Intuitive Operation

Digital temperature display makes operation easy and user-friendly.

Multi-Sample Testing Capability

Four test positions improve laboratory efficiency.

Ideal for Heavy Oil Analysis

Suitable for heavy fuel oils, lubricants, and petroleum residues.