Model: K593 Conradson Carbon Residue Apparatus

Measures the carbon residue of petroleum products. It provides an indication of relative coke forming properties of petroleum products. The residue remaining after a certain period of evaporation and pyrolysis is calculated as a percentage of the original sample.

Conforms to ASTM D189 and related specifications.

A weighed quantity of oil sample is placed in a crucible and heated to a high temperature for a fixed period. The crucible and the carbonaceous residue is cooled in a desiccator and weighed. The residue remaining is calculated as a percentage of the original oil sample and reported as Conradson carbon residue.

Technical specification

Porcelain crucible: Low type, volume about 30mL

Inner iron crucible: Iron sheet material, volume 75±5mL, surface black coating

Outer iron crucible: Iron sheet material, volume 190±10mL, with cover, surface black coating

Tripod: Iron sheet material, surface nickel-chromium plated and polished, height 250±10mm, ring diameter Ф130±5mm

Flame shield: 0.6 --- 0.8mm thickness iron sheet material,diameter of upper opening of the middle hole isΦ90±2mm, and diameter of lower opening is Φ82±2mm. Loaded with an asbestos pressure ring. (The other type of flame shield contains three bending feet in the hole of flame shield to support the crucible.)

Round iron shield: 0.8mm thickness iron sheet material, the height of lower part is 50mm --- 53mm, the height of cone in the middle is 25±2mm. There is a piece of Φ3 iron wire welded on the upper section of round tube. The iron wire is bent to a fire bridge of 50±3mm in height, which is like a mouth. The fire bridge is black and is used as an indicator for the maximum height of the flame.


If you would like to discuss your requirements for this product further, please email us at or use our enquiry form.