About Sin Jia

Sin Jia Enterprise (also called “SJ Gauge”) was originally a one-man shop. Jeff Cheng, our founder, traveled to Japan in 1982 to study the professional techniques needed to craft industrial instruments. went through the period in the 1980s, when Taiwan Instruments was monopolized by foreign companies. After returning to Taiwan and founding SJ Gauge in 1998, he continued to learn and improve..