单一导杆完全绝对值型
(single-pitch&single-rod)
以1个pitch检出8.192～32mm范围内绝
对值。

单一导杆半绝对值型
(multi-pitch&single-rod)
以多个pitch来检出20~64mm范围内绝
对值。

双导杆半绝对值型
(multi-pitch&dual-rod)
以2根导杆构造来检出2048mm范围内绝
对值。