| Company | Country | ZIP | City |
| Arnold Horsch | Germany | 42859 | Remscheid |
| Belec GmbH | Germany | 49124 | Georgsmarienhütte |
| Buehler Worldwide HQ | USA | 60044 | Lake Bluff / IL |
| Buehler European HQ (ITW Test & Measurement) | Germany | 73734 | Esslingen |
| Bürkert GmbH & Co. KG | Germany | 74653 | Ingelfingen |
| Czah Pomiar Sp. z o. o. | Poland | 40241 | Katowice |
| Datapaq Ltd. | Germany | 13127 | Berlin |
| Dias Infrared GmbH | Germany | 01189 | Dresden |
| Econox SA | Switzerland | 2942 | Alle |
| ESI Prüftechnik GmbH | Germany | 73240 | Wendlingen |
| The Fredericks Company (Televac Vacuum Measurement) | USA | PA 10996 | Huntingdon Valley |
| Galdabini SpA | Italy | 21010 | Cardano al Campo |
| Günther GmbH | Germany | 63589 | Linsengericht |
| Heitronics GmbH | Germany | 65205 | Wiesbaden |
| Heraeus Kulzer GmbH – Division Technique | Germany | 61273 | Wehrheim |
| Herth GmbH | Germany | 59368 | Werne |
| HSL-Härtereizubehör | Germany | 51789 | Lindlar |
| Isserstedt Prüfmaschinen GmbH & Co. KG | Germany | 41751 | Viersen |
| Keller HCW GmbH – Division MSR | Germany | 49479 | Ibbenbühren |
| Latzke Prüfmaschinen-Service e. K. | Germany | 51674 | Wiehl |
| Leco Instruments | USA | MI 49085 | St.Joseph |
| LumaSense Technologies | USA | CA 95054 | Santa Clara |
| MESA Electronic | Germany | 82538 | Geretsried |
| Mitutoyo (Hardness Testing Machines) | Worldwide | Worldwide | |
| Mitutoyo Europe GmbH | Germany | 41469 | Neuss |
| MKS Instruments | USA | MA 01810 | München |
| OptoPrecision GmbH | Germany | 28359 | Bremen |
| Optris GmbH | Germany | 13127 | Berlin |
| Oxford Instruments | UK | Oxford | |
| PhoenixTM GmbH | Germany | 32549 | Bad Oeynhausen |
| Qness GmbH | Austria | 5440 | Golling |
| 3-Rath Kalibrier + Prüftechnik GmbH & Co.KG | Germany | 57299 | Burbach |
| Raytek | USA | CA 95061 | Santa Cruz |
| Rohmann GmbH | Germany | 67227 | Frankenthal |
| Schimadzu | Japan | Kyoto | |
| Schütz + Licht Prüftechnik | Germany | 40764 | Langenfeld |
| Sensortherm GmbH | Germany | 65843 | Sulzbach |
| Spectro Analytical Instruments GmbH | Germany | 47533 | Kleve |
| Struers GmbH | Germany | 47877 | Willich |
| Thermo Sensor GmbH | Germany | 59199 | Bönen |
| Thermo-Control Körtvélyessy GmbH | Germany | 13469 | Berlin |
| Vogtlin Instruments AG | Switzerland | 4147 | Aesch BL |
| Zwick GmbH & Co. KG | Germany | 89079 | Ulm |