Kolery is mainly engaged in petrochemical analysis instruments, oil testers like karl fishcher moisture analyzer, kinematic viscometer, oil flash point tester, pour point & could point tester, sulfur content analyzer, oil acidity meter, octane meter, softening point tester, ash content analyzer, lubricating oil foaming tester, dropping point tester, emulsion breaking test, oil distillation range tester, oxygen bomb calorimeter, etc.