Transport IoT (Internet of Things) has enabled real-time analysis of oil samples and machinery using online sensors. In comparison to laboratory oil testing, online testing provides continuous evaluation of oil condition parameters. Thus, online testing is considered as technological advancement in the oil condition monitoring market. Online oil testing offers real-time analysis in which the sensors readily detects the problem and further provides suggestions for on-site or off-site testing. Online testing gives an indication of when an oil sample should be sent to a laboratory for more detailed information. Currently, plant operators are more interested in continuous oil quality testing rather than regular sampling. This is driving demand for online oil testing.