The ACL-3 is an advanced automatic colorimeter for petroleum products, measuring Saybolt, ASTM, Pt-Co/Hazen, and Gardner color values using Tri-Stimulus spectroscopy (ASTM D6045). It delivers precise, repeatable results in about 5 seconds without subjective judgment, ensuring full traceability. The device displays spectral transmittance, optical density, and color values via a 5.7-inch color LCD touchscreen. It features a white LED light source, CMOS linear image sensor, and supports USB and parallel port connectivity, with data saved to USB flash drives. Compliant with major ASTM and ISO standards, the ACL-3 is compact and user-friendly.