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Hardness Tester
Keywords: Barcol impressor, HT-25 hardness tester, digital hardness tester, aluminum hardness tester, portable hardness tester
Digital indentation hardness tester with balance positioning, digital display and non-disassembly calibration, measuring Barcol, Brinell, Vickers, Webster and Rockwell hardness with Bluetooth and RS232 output options.

HT-25 Barcol Impressor
1. Digital indentation hardness tester, latest design and development
2. Balance positioning, digital display of hardness value, non-disassembly calibration and adjusting
3. Good stability, convenient calibration and high detection accuracy
4. Small and portable; single hand operation, can be used wherever the hand can reach
5. Wide test range from very soft pure aluminum to particularly hard aluminum alloy, equivalent to 25~150HB
6. No support needed; tests on only one side of the sample
7. Measures Barcol (HBa), Brinell (HB), Vickers (HV), Webster (HW) and Rockwell (HRB/HRE/HRF/HRH) hardness
8. Maximum hold function holds the maximum hardness value during measurement
9. Average value calculation, up to 29 sets of data
10. Bluetooth data output and RS232 output options
![]() Close-up of the control and display area. | ![]() Detail view of the body, finish and markings. | ![]() Close-up of the connections and mounting section. |
| Range | 0~100HBa, equal to 25~150HBW |
| Resolution | 0.1HBa |
| Indication Error | 81~88HBa: ±1HBa; 42~48HBa: ±2HBa |
| Repeatability Error | 81~88HBa: ±1.5HBa; 42~48HBa: ±2.5HBa |
| Brinell Hardness | Yes |
| Vickers Hardness | Yes |
| Webster Hardness | Yes |
| Rockwell Hardness | Yes |
| Maximum Hold | Yes |
| Average Calculation | Yes |
| Operating Condition | Temperature: 0~50°C; Humidity: below 80%RH |
| Power Supply | 2 x 1.5V AAA (UM-4) battery |
| Dimensions | 170 x 63 x 82mm |
| Weight | 390 g (not including batteries) |
| Standard Packing | Main unit; 2 pins; 2 standard blocks; pin length calibration block; screw driver; spanner |
| Optional | Bluetooth data adapter, RS232 software and cable |


