Xian TianHou Electronic-Technology Co., Ltd is the leading supplier and manufacturer of oil quality analyzers in China. After established in 1992, THY series oil quality analyzers won praised by insiders in lubrication management. THY series oil quality analyzers have realized lubricant replacement according to quality. In 2000, THY-20C passed technology achievement appraisal by Lanzhou Military Command. In 2001, it won the second prize for technology progress in the military system of China and national patents which including one invention patent and three design patents. It introduced CIS in the same year. In 2002, the company passed Hi-tech Enterprise Authentication. Oil quality analyzer detects and measures the dielectric constant of oil. By measuring the complex dielectric constant of oil, it is able to determine the degree of change in the dielectric constant of the oil. Dielectric change is directly related to the degradation and contamination level of the oil and helps the user to optimize intervals between oil changes and to detect increased mechanical wear and loss of the oils lubricating properties. To guarantee the quality, we have established and perfected quality guaranty system. In 2001, we got ISO9001:2000 certificate. We sticks to firm and standard quality control in production process and carries out modern management. It attaches much attention to employee education and comprehensive enterprise character.