| 1949 | Founded by Mr. Fieseke and Mr. Hoepfner as Frieseke & Hoepfner GmbH, a company specialized in precision machinery, hydraulic tool equipment, radiation monitoring and industrial gauging technology. |
| 1954 | Acquired by the owner of FAG Kugelfischer, although the company still operated under the name of Frieseke und Hoepfner GmbH, continuing to manufacture practically the same product range. |
| 1981 | Integrated as 3 product divisions, Hydraulic & Control, Radiation Monitoring and Radiometrie into FAG Kugelfischer, a cooperaton with 38,000 employees. |
| 1986 | In March the Radiometrie division acquired Daystorm (Gloucester, England) and Nucleometre (Sarcelles, France) from Schlumberger and formed the largest gauging company in Europe. |
| 1993 | Thermo Instrument Systems acquired Radiometrie as of Nov. 1, 1993. In 1994, Eberline Instrument GmbH was formed. |
| 1996 | Thermo Instrument Systems spun out its divisions Eberline Radiometrie and Gamma Metrics to form Metrika Systems Corporation. |
| 1998 | Metrika Systems Corporation acquired the metals gauging division of Honeywell-Measurex, forming Radiometrie, the world's largest gauging company with three plants in Germany, U.K. and USA. |
