The SKF TMEH 1 is a portable instrument that displays immediate information on the oil condition, which in many cases makes a lengthy laboratory investigation unnecessary. The unit measures the changes in dielectric constant of an oil. 

By comparing the measurements obtained from used and unused oils of the same type and brand, the oil check monitor is able to determine the degree of change in the condition of the oil. Dielectric change is directly related to the degradation and the contamination level of the oil. It will allow the user to achieve optimized intervals between oil changes and detect increased mechanical wear and loss of the oil’s lubricating properties. To facilitate trending the instrument is equipped with a numerical read-out.