... , DTM312B, DTM315A, DTM315B, DTM322A, DTM322B, DTM325A, DTM325B suits the measurement with target and prism. Angle accuracies are 2", 3" and 5 ... measurement sectionHorizontal angle panelPhotoelectric incremental rotary encoder scanning, adopt diametrical detectionVertical angle panelPhotoelectric incremental rotary encoder scanning, with absolute 0 index pointMinimum display1 ...