當您想要在客戶的產品測量中測量軸的軸直徑時使用它。
從噴嘴孔注入壓縮空氣，並通過接觸葉測量外徑。剪刀型和環型有兩種類型。
LV Type:
| Nominal Size D exceeded ~ less | A | B | L |
| 4 exceeded 10 or less | 38 | 47 | 90 |
| 10 exceeded 14 or less | 42 | 50 | 90 |
| 14 exceeded 24 or less | D+30 | 68 | 90 |
| 24 exceeded 40 or less | D+30 | 73 | 90 |
| 40 exceeded 55 or less | D+30 | 73 | 90 |
| 55 exceeded 70 or less | D+30 | 76 | 110 |
