| Model | TH300 | TH320 |
| Hardness scales | Rockwell A, B, C,D,E,F, | Rockwell A,B,C,D,E,F,G,H,K,L,M,P,R,S,V |
| G, H, K ,L, M ,P, R, S, V | Rockwell superficial15/30/45N,T,W,X,Y | |
| Resolution | 0.1Rockwell unit | |
| Pre-load | 98.07N/10kgf | 98.07N/10kgf, 29.42N/3kgf |
| Total load | 588.4N/60kgf, 980.7N/100kgf, 1471N/150kgf | 588.4N/60kgf, 980.7N/100kgf, |
| 1471N/150kgf, 147.1N/15kgf, | ||
| 294.2N/30kgf, 441.3N/45kgf | ||
| Display | Matrix backlight LCD | |
| Language | English, French, Germany | English |
| Operation | Menu selectable, Membrane keypad | |
| Test process | Automatic | |
| Load duration | 2-50 seconds, can be set,dynamic displayed and stored | |
| Functions | Upper / lower hardness limits setting and alarming | |
| Data statistics : Ave., Max., Min., standard Deviation | ||
| Convert tested values to HB, HV, HLD and δb (Tensile-strength) | ||
| Curvature correction: cylinder and sphere surface | ||
| Data output | RS232 | |
| Tester standard | ISO6508.2 , ASTM E-18 | |
| Testing space | Vertical: 250mm (9.85〃) | Vertical: 250mm (8.66〃) |
| Horizontal:150mm (5.91〃) | Horizontal:150mm (6.00〃) | |
| Work piece size | External surface cylinder: Min.Ø3mm (0.120〃) | |
| Internal surface cylinder: Min.Ø23mm (0.900〃) | ||
| Power supply | 220v/110v, 50Hz, 4A | |
| Dimensions (mm) | 715×225×790 | 720×240×815 |
| Weight (kg) | 100 | 120 |