The Checkline SH-21 (now SH-21A) is designed for precise measurement of hardness in difficult to reach areas of compact parts, metal casts, gears, crank shafts, component parts and more. It is ideal for inspection and maintenance of large-scale structures, vehicles, ships, steel towers, bridges, aircraft.
| Measuring Indentor | Diamond indenter for Micro-Vickers (facing-to- surface angle of 136) |
| Testing Force | SH-21-E2:Approx 2kgf (roughly 20N) SH-21-E1:Approx 1kgf (roughly 10N) SH-21-E4:Approx 4kgf (roughly 40N) (manual probe only) |
| Measuring Range | Rockwell hardness: HRC 10.0 - 70.0 Vickers hardness: HV 100 - 999 Shore hardness: HS 20.0 - 99.9 Brinell hardness: HB 85 - 550 |
| Resolution | 1HV, 0.1HRC, 0.1HS, 1HB, 1N/mm2 (tensile strength) |
| Repeatability | HRC : 1.0HRC HV : (3%rdg)HV HS : 1.0HS HB : (3%rdg)HB |
| Applicable test materials | Steel is the principle material, other metallic materials may also be measured by calibrating against a standard hardness test block. |
| Display | Digital display (LCD, 4 digits) with EL backlight |
| Temp limit | 0-50 C Ambient |
| Power | AC adapter(100 - 240V) or lithium ion rechargeable battery |
| Battery Life | 5 hours using backlight, 8 hours without backlight |
| Dimensions | Display: 97(W) x 50(D) x 170(H) mm Probe diameter: 40mm, length: 164mm |
| Weight | Display: approx. 400g (including battery) Probe and cable: approx. 400g |
| Carrying case dimensions | 400(W) x 220(D) x 140(H) mm |
| Output | RS-232C output used for data transmission or printing |
| Frequency | Motorized / manual switchover type approx 69-71kHz Manual type (optional) approx 38-40kHz |
| Conversion | HV, HRC, HS, HB, N/mm2 according to JIS B 7731, ASTM E 140, DIN 50150 |
| Warranty | 1 Year |