Thy-18f oil quality analyzer is a portable instrument which measures changes of contamination and electro-chemical which occur in lubricant. by comparing data obtained from used oil and new oil of same brand, the oil quality analyzer can check the degree of change in the dielectric constant of oil. \n\ndielectric change directly relates to the degradation and contamination level of oil. oil analyzer helps users optimize intervals between oil changes and detects increased mechanical wear and loss of the oil lubricating properties.