Authorized Resellers | Handheld Particle Counters Only
| International Territory | Company | Products |
| Australia | Ecotech | Handhelds |
| Belgium, Netherlands, France, Tunisia, Algeria and Luxembourg. | Envitec | Handhelds |
| China | Handhelds | |
| China | Handhelds | |
| Germany | Handhelds | |
| Italy | Handhelds | |
| Japan | Sibata Scientific Technology Ltd. |
Handhelds |
| Korea | HiMax Tech Co., Ltd. | Handhelds |
| Pakistan | Dawn Scientific Company. | Handhelds |
| Singapore | Absolute Instrument Systems (Pte.) Ltd. | Handhelds |
| Taiwan | Sheng Yi Tech & Analytics Co., Ltd. | Handhelds |
| Thailand | DKSH (Thailand) Ltd. | Handhelds |
| Trinidad and Tobago, southern Caribbean region | Handhelds | |
| United Kingdom, Ireland | Handhelds |
| United States | Company | Products |
| Entire Country | Handhelds | |
| Entire Country | Handhelds | |
| Entire Country | Handhelds | |
| Entire Country |
Zefon International |
