| 1974 - 1989 | Representative the products and services by Dynamic Supply Engineering |
| November 1989 | Founded the Yokogawa (Thailand) Ltd. with “Sale and Service Function” |
| April 1990 | Set up “Engineering Function” |
| April 1991 | Set up “Training Center Function” |
| April 1992 | Opened the Rayong Branch Office with “Sale and Service Function” |
| June 1997 | Capital increased from 10 Million Baht to 30 Million Baht |
| July - November 1998 | Capital increased from 30 Million Baht to 60 Million Baht,and 60 Million Baht respectively |
| July 1998 | Attaining the ISO/IEC Guide 25 Certificate for Accredited Standard Calibration Laboratory from TISI (Thai Industrial Standards Institute) |
| March 1999 | Opened the “Banpong Service Office” and “Surathani Service Office” |
| March 2001 | Set up “Sale Function” at Surathani office |
| May 2001 | Attaining the ISO9001: 2000 Certificate from URS (United Registrar of System Ltd.) |
| May 2002 | Attaining the ISO/IEC 17025 Certificate for AccreditedStandard Calibration Laboratory from TISI (Thai Industrial Standards Institute) |
| March 2004 | Joint venture with REPCO to establish E&I Solution Co., Ltd. serving the services and installations |