| Feature |
A1310 Petroleum Products Colorimeter |
Basic Visual Color Comparison |
Digital Colorimeter |
| Measurement Method |
Standard color glass comparison |
Visual comparison |
Electronic optical measurement |
| Petroleum Color Scale |
No. 1–25 |
Depends on standard |
Depends on instrument |
| Standard Color Plates |
Integrated |
Usually required separately |
Not normally required |
| Controlled Illumination |
Yes |
Usually basic |
Electronic light source |
| Optical Focusing |
Yes |
Limited |
Not applicable |
| Sample Tube |
Dedicated color comparison tube |
Varies |
Instrument-specific |
| Result Reading |
Standard color number |
Visual color number |
Digital value |
| Operation |
Manual visual comparison |
Manual visual comparison |
Instrument-assisted |
| Typical Application |
Petroleum and lubricating oil color testing |
Basic color inspection |
Quantitative color analysis |