Pen-type Steel Hardness Tester Metal Durometer, Non-destructive hardness testing of materials. Continuous working time：About 20 hours. Test conditions of Richter hardness tester: The workpiece weight is not less than 2KG, The minimum thickness is not less than 10mm, The surface roughness is not less than 1.6um. When the above conditions are not achieved stable support or dense coupling! Measurement direction: Support 360º (vertical downward, diagonal downward, horizontal, diagonal upward, vertical upward) Hardness system: Richter (HL), Brinell (HB), Rockwell B (HRB), Rockwell C (HRC), Vickers (HV), Shore (HS) Indication error: ±0.5%(HLD=800) Repeatability of indication: 0.8%(HLD=800) Dimensions:148mm×30mm×30mm lLarge capacity data storage: Unprecedented mass storage leads the technology trend. 270 groups of hardness measurement data can be saved, including average value and hardness system. This instrument is equipped with D-type sensor, which needs to measure the hardness of metal more than 5mm. D-type probe is a conventional probe, which is suitable for measuring most workpieces. Special workpiece (such as thin workpiece, groove workpiece, etc.) Scope of test: (170-960)HLD (17.9-69.5)HRC (19-683)HB (80-1042)HV (30.6-102.6)HS (13.5-101.7)HRB Leeb hardness tester does not contain calibration blocks, you need to purchase calibration blocks locally. When the "forged steel" sample is tested with D-type impact device, Hb value can be read directly without manual check. The upper and lower limits of hardness value can be set in advance, and the alarm will be automatically out of range, which is convenient for users to test in batches.