Marmonix MHT-720-DSP Portable Hardness Tester
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The Marmonix MHT-720-DSP portable hardness tester measures common hardness scales from a rechargeable handheld unit and prints field reports with its built-in thermal printer.
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Description
The Marmonix MHT-720 (MHT-720-DSP) is a portable Leeb hardness tester with a built-in thermal printer for on-site reports. Compared with the sibling MHT-710DS digital hardness tester, choose the MHT-720 when you need instant printed tickets in the field plus a rechargeable Li-ion pack—rather than AA batteries and PC-only report printing.
Browse Marmonix hardness testers, and see related gauging tools under thickness testers and our coating thickness gauges guide.
MHT-720 portable hardness tester highlights
What the MHT-720-DSP delivers for metal QC and field NDT:
- Built-in high-speed thermal printer for immediate hardness tickets
- Measuring range about 170–960 HLD with ±6 HLD accuracy (typ.)
- Multi-scale support including HL, HRC, HRB, HRA, HB, HV, HS and U.T.S. conversion
- Memory for about 600 groups with PC connectivity for archive work
- Auto recognition of multiple impact devices; test at any angle, including upside down
- Rechargeable Li-ion battery; compact about 230×86×46 mm / ~450 g
Where teams use the MHT-720 DSP hardness meter
Typical MHT-720 use cases include:
- Bearings & heavy parts — production and incoming inspection
- Pressure vessels & turbines — failure analysis and maintenance rounds
- Steel & castings — cast steel, tool steel, stainless, gray/nodular iron
- Tight access — components where a portable impact device fits better than a bench tester
MHT-720 typical specifications
| Model | MHT-720-D/S (MHT-720-DSP) |
| Measuring range | (170–960) HLD; (17.9–69.5) HRC; (19–683) HB; others per scale |
| Accuracy | ±6 HLD (typ.) |
| Memory | 600 groups |
| Printer | Built-in thermal (paper ~40.5–44.5 mm) |
| PC connection | Available (USB / software) |
| Battery | Rechargeable Li-ion |
| Operating temp. | −20 °C to +60 °C |
| Size / weight | 230×86×46 mm / ~450 g |
| SKU / Brand | MHT-720 / Marmonix |
MHT-720 hardness tester questions
What hardness scales does the MHT-720 support?
It supports multiple Leeb-derived scales including HL, HRC, HRB, HRA, HB, HV, and HS, with conversion to tensile strength (U.T.S.) for broader reporting.
When should I choose the MHT-720 instead of the MHT-710DS?
Choose the MHT-720 for a built-in thermal printer and rechargeable Li-ion pack for ticket-style field reports; pick the MHT-710DS when a lighter AA-powered unit with PC software printing is enough.
What sample conditions are needed for reliable readings?
Typical guidance is sample weight above about 2 kg, thickness above about 10 mm, and suitable surface finish; couple to a steel backing when the part is thinner or lighter.
Related: Hardness testers · MHT-710DS · Coating gauges guide
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