| Tenmars | TM-507 | Insulation Tester |  | |
| Uni-t | UT511 | Insulation Resistance Testers | | |
| Uni-t | UT512 | Insulation Resistance Testers | | |
| Uni-t | UT513 | Insulation Resistance Testers | | |
| Uni-t | UT522 | Earth Groud Testers | | |
| Uni-t | UT526 | Multifunction Electric Meters | | |
| Tenmars | YF-509 | Insulation Tester | | |