Its insulating layer is made of silicon dioxide fiber and its protective layer is weaved by silicon dioxide fiber. Another insulating layer is made of ceramic fiber and the protective layer is weaved by ceramic fiber.
| Model | Graduationm Mark | Measuring rangef'C) | Section |  |
| WRNG-010 | K | 0~1000 | 1.0 | |
| WRNG-015 | K | 0~1200 | 1.5 |
