| Model No | TM-505B | TM-A505B | TM-1005B | TM-A1005B |
| Order No | 176-818A | 176-820A | 176-819A | 176-821A |
| Objective Lens | Standard accessory:2x,Options: 5x, 10x | Standard accessory:2x,Options: 5x, 10x | Standard accessory:2x,Options: 5x, 10x | Standard accessory:2x,Options: 5x, 10x |
| Mic Head.Max. Workpiece Height | 4.53in 115mm | 4.53in 115mm | 4.21in 107mm | 4.21in 107mm |
| Transmitted illumination | Stepless brightness adjustment, White LED light source, With green filter | Stepless brightness adjustment, White LED light source, With green filter | Stepless brightness adjustment, White LED light source, With green filter | Stepless brightness adjustment, White LED light source, With green filter |
| Surface illumination | Oblique single-source type, Stepless brightness adjustment, White LED light source | Oblique single-source type, Stepless brightness adjustment, White LED light source | Oblique single-source type, Stepless brightness adjustment, White LED light source | Oblique single-source type, Stepless brightness adjustment, White LED light source |
| Cross travel measuring range | 2 x 2in 50 x 50mm | 2 x 2in 50 x 50mm | 4 x 2in 100 x 50mm | 4 x 2in 100 x 50mm |
| Table top size | 16x6in 52x 152mm | 16x6in 52x 152mm | 9.44x6in 240x 152mm | 9.44x6in 240x 152mm |
| Usable area of stage glass | 3.8x3.8in 96x96mm | 3.8x3.8in 96x96mm | 6x3.8in 154x96mm | 6x3.8in 154x96mm |
| Linear measurement method | Mic Heads Optional | Mic Heads Included | Mic Heads Optional | Mic Heads Included |
| Resolution | N/A | .00005"/1µm | N/A | .00005"/1µm |
| Micrometer head travel range | N/A | 2"/50mm | N/A | 2"/50mm |