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As market leader in Petroleum Analyzers, Optimus Instruments provides innovative and cost-effective techniques for physical property testing, distillation and element analysis for almost 30 years. Great instruments combined with excellent after sales service and our worldwide unique ISO17025 accredation for verification makes Optimus Instruments a partner you can count on.


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ROFOX4 - Automatic Oxidation Stability Tester (ASTM D525, D873)

The „ROFOX four” is a compact and automatic Oxidation Stability Tester with 4 independent test positions. Allowing its users to avoid the use of any liquids thanks to the solid ectric heating block.

The ROFOX four comes with andquot;ROFOX controlandquot; software that controls the entire process including automatic reporting. Test- and safety parameters are permanently monitored for optimal operations.


- Every unit can be heated separately
- short warm-up time
- unattended operations possible
- Easy temperatre-calibration
- Pressure sensors and calibration are maintenance free

Technical details:


ASTM D525/D873


This apparatus is used to test the stability of aviation reciprocating, turbine, and jet engine fuels to form gum and deposits under accelerated aging conditions like heating. This process is called an oxidation process.


- 4-unit device
- Electric heating blocks (no bath)
- Compact design
- Independently temperature regulated units (4 temperature controllers)
- Short heating-up time
- Software-controlled test procedure
- Automatic data interpretation and report generation (selectable file formats)
- Data and test results will be archived in database
- Selectable device interface