Step into our short showcase to explore the SD-30011 Electric Furnace Carbon Residue Tester in action. In this video, we demonstrate how this benchtop instrument determines carbon residue in lubricating oils and heavy liquid fuels per SH/T 0170. Watch a full walkthrough of its 4-hole furnace, digital temperature control up to 520°C, and main/auxiliary heating modes — and see how four samples can be tested simultaneously for efficient, reliable lab results.