At high temperatures the oil used for lubricating engines generates vapours. When these come into contact with the colder atmosphere in the crankspace at temperatures around +70 deg. C, they condense into an oil mist and represent the condition associated with the excess temperatures such as those caused by main crankshaft, big end or connecting rod small end bearing defects.
The Visatron VN215/93 is the Oil Mist Detector with the highest sensitivity. The Visatron VN215/93 is suitable for the monitoring of crosshead engines that are running at medium and slow speed. This is because the oil mist spreads out slower from the damaged compartment, compared to trunk piston engines.