The HBRVU-250 Blowe Optical Hardness Tester has a total of 7 test force levels, and three test methods are available for users to choose from. Among them, Vickers hardness (HV) 30 and 100 have two test forces; Brinell hardness (HB) 31.25, 62.5, 250 has three test forces; Rockwell hardness (HRA, HRB, HRC) 60, 100 and 150 have three levels of test force, which can meet the needs of users for a variety of hardness tests

●The Rockwell hardness value is directly read by the optical projection screen, and the Vickers and Brinell hardness values are measured by a microscope device (measured in two directions perpendicular to each other) and obtained by using their arithmetic mean look-up table
●The loading, retaining and unloading of the test force are semi-automatically controlled, and the speed is controlled by the flow rate of the buffer
●This instrument has high sensitivity, stability, strong operability, and is widely used in workshops and laboratories
| Standard configuration | |||
name | quantity | name | quantity |
| Rockwell diamond indenter | 1 pc | Diamond Vickers indenter | 1 pc |
| φ1.5875mm steel ball indenter | 1 pc | φ2.5mm steel ball indenter | 1 pc |
| φ5mm steel ball indenter | 1 pc | Large, medium flat, "V" type test bench | 3 in total |
| Brinell hardness block | 1 piece | Rockwell hardness block | 3 pieces |
| Vickers hardness block | 1 piece | Small weight 0 | 1 pc |
| weight | 1 set | Fuse 0.5A (Specification ¢5*20) | 2 pcs |
| Power cord | 1 root | Instrument bulb 6V/15F | 2 pcs |
| Dust-proof plastic bag | 1 pc | Product Certificate of Conformity | 1 serving |
| Instruction manual for the product | 1 serving | Microscope seat | 1 pc |
| 15x micrometer eyepiece | 1 pc | 2.5x objective | 1 pc |
| 5x objective | 1 pc | Skateboard test bench | 1 pc |
| Conical test bench | 1 pc | "V" type test bench | 1 pc |
| Inner lighting head | 1 pc | Exterior lighting shades | 1 pc |
| Small bulb 6V/5W | 4 pcs |