Phase2+ 900-331 Rockwell Hardness Tester
The Phase2+ 900-331 and 900-331D are professional-grade benchtop Rockwell hardness testers built on the same proven platform - available in two readout configurations to match your workflow. Both instruments combine state-of-the-art design with dynamic precision to deliver highly sensitive and accurate hardness readings across all standard Rockwell scales, and both conform to ASTM E-18 for reliable, traceable results in any production or laboratory environment.
The 900-331 features a direct analog dial gauge readout - favored by experienced operators for its real-time feedback, zero dependence on electronics, and immediate legibility in any lighting condition. The 900-331D pairs the same trusted mechanical platform with the 9500 Series digital indicator upgrade, delivering direct digital Rockwell readings and automatic conversion to Brinell (HB) and Vickers (HV) - eliminating manual conversion charts and reducing transcription errors during inspection and reporting.
Both models use dead weight test force application and a hydraulic dashpot control system to deliver smooth, consistent load performance on every test cycle. They are perfect, rugged performers suited for heat treat facilities, tool rooms, workshops, laboratories, and inspection labs and both include lifetime technical support at no additional cost.
Key Features
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Two Display Options, One Proven Platform - Choose the 900-331 with a direct analog dial gauge for battery-free simplicity, or the 900-331D with a digital LCD display and automatic conversion to Brinell (HB) and Vickers (HV) both built on the same ASTM E-18 compliant mechanical platform.
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Full Rockwell Scale Coverage - ASTM E-18 Compliant - Tests all standard Rockwell hardness scales including HRA, HRBW, HRC, HRD, HRE, HRF, HRG, and more, delivering consistent, repeatable results across a broad range of metals and alloys.
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Dead Weight Loading with Hydraulic Dashpot Control - Dead weight force application at 60, 100, and 150 kgf major loads combined with a hydraulic dashpot system ensures precise, repeatable indentation force on every test cycle, free from the variability introduced by spring or motorized systems.
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Generous Vertical Capacity & Throat Depth - A 6.7" vertical capacity and 6.6" throat depth accommodate a wide variety of part sizes and geometries, from small precision components to larger castings and forgings.
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Built Tough for Any Production Environment - Heavy-duty construction stands up to the demands of heat treat facilities, QC labs, tool rooms, and machine shops without any compromise in measurement accuracy or long-term reliability.
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Lifetime Technical Support Included - Every Phase2+ 900-331 and 900-331D ships with lifetime technical support, a full set of anvils and indenters, and NIST-traceable test blocks - everything needed to be operational and compliant from day one.
Specifications
| Specification |
900-331 (Analog) |
900-331D (Digital) |
| Results Display |
Analog Dial Gauge |
Digital LCD |
| Digital Indicator |
— |
9500 Series Upgrade |
| Auto Scale Conversion |
— |
Brinell (HB) & Vickers (HV) |
| Minor Load |
10 kgf |
10 kgf |
| Major Load |
60 kgf, 100 kgf, 150 kgf |
60 kgf, 100 kgf, 150 kgf |
| Test Force Application |
Dead Weight |
Dead Weight |
| Test Force Control |
Hydraulic Dashpot System |
Hydraulic Dashpot System |
| Rockwell Scales |
HRA, HRBW, HRC, HRD, HRE, HRF, HRG, and more |
HRA, HRBW, HRC, HRD, HRE, HRF, HRG, and more |
| Vertical Capacity |
6.7 in. |
6.7 in. |
| Throat Depth |
6.6 in. |
6.6 in. |
| Height |
30.0 in. |
30.0 in. |
| Width |
8.50 in. |
8.50 in. |
| Depth |
20.0 in. |
20.0 in. |
| Shipping Weight |
242 lbs. |
242 lbs. |
| Standard Compliance |
ASTM E-18 |
ASTM E-18 |
| Technical Support |
Lifetime |
Lifetime |
Items Included
- Hardness Tester Main Unit
- C-Scale Diamond Indentor
- 1/16" Ball Indentor
- 3 HRC Test Blocks
- 1 HRB Test Block
- Test Table 5.87" (150 mm)
- Flat Anvil 2.5" (63 mm)
- Standard Vee Anvil
- Accessory Case
- Dust Cover
Phase2+ 900-331 Rockwell Hardness Tester User Manual
Phase2+ 900-331 Rockwell Hardness Tester Catalog
Phase2+ 900-331D Rockwell Hardness Tester Catalog
