Ultrasonic Hardness Meter

Ultrasonic Hardness Meter

  • Product Number:LD-YD900
  • Product Difference:Surface hardness testing for various components of all sizes

Product Introduction

The ultrasonic hardness tester features a color display with comprehensive readouts. Nine buttons on the front panel enable various menu settings. A USB port on the side facilitates charging and data communication, with an indicator light beside it showing charging status. This instrument measures surface hardness on both large and small components, including hard-to-reach areas such as tooth flanks or gear roots.

Applications include:
1. Hardness measurement of flange edges, gear root stampings, tooling, sheet metal, surface-hardened teeth and gear grooves, and tapered sections
2. Hardness measurement of shafts, thin-walled pipes, and containers
3. Hardness measurement of wheels and turbine rotors
4. Hardness measurement of drill bit cutting edges
5. Hardness measurement of welded areas
6. Measurement of deep holes with specific bore diameters, indentations/protrusions with significant curvature, and irregular surfaces
7. Hardness measurement covering the vast majority of ferrous metals, non-ferrous metals, and their alloys in industrial production

Product Features

  • Compact size and lightweight design for easy portability. Enables straightforward online measurement, suitable for field applications and large workpiece inspections. Accessible even in hard-to-reach areas such as tooth flanks or gear roots.

  • High measurement accuracy: Achieves ±4%HV, ±4%HB, ±1.5HR.

  • Minimal test indentation: Requires high-power microscope observation, causing negligible damage to workpieces.

  • Rapid measurement speed: Outputs test results in as little as 1 second.

  • Large-screen display: Directly shows current measurement values, cumulative measurements, maximum/minimum values, averages, and unit conversion values.

  • Simple calibration: Stores 5 sets of single-point calibration data, 1 default set, and 5 multi-point calibration sets internally.

  • Stores 50 sets of measurement data and 10 calibration sets.

  • Single-point calibration for materials with varying elastic moduli ensures convenience and efficiency.

  • For materials without clear conversion tables or unknown materials, any hardness scale can be selected for multi-point calibration, eliminating systematic errors caused by conversion tables.

  • Any hardness scale can be customized in multi-point calibration mode.

  • Can connect to an external Bluetooth printer to print measurement data (optional) or connect to a computer terminal to export measurement data.

Product parameters

Measurement RangeHV50-1599, HRC20-68, HB85-650, HRB41-100, HRA61-85.6, HS34.2-97.3, MPa 255-2180
Test ParametersVickers HV
Conversion ParametersRockwell HRC, HRA, HRB; Brinell HBW, etc.
Measurement Accuracy±4% HB, ±1.5 HR, (Refer to HV Maximum Permissible Relative Error Table)
Test DirectionSupports 360° measurement. Measurement possible when indenter forms 90°±3° angle with test surface
Data Storage50 sets of measurement data and 10 calibration data sets
Display TypeColor screen display
Battery Specifications3.6V, 3000mAh lithium battery
Battery life10 hours


Table of Maximum Permissible Relative Errors

Hardness of the standard blockMaximum Permissible Relative Error of the Hardness Tester %
HV10HV5HV2HV1
<250HV4444
250HV-500HV4444
>500HV-800HV4455
>800HV4466


Probe Parameters

Probe Type1kgf Manual Probe2kgf Manual Probe3kgf Manual Probe5kgf Manual Probe10kgf Manual Probe
ConfigurationOptionalStandardOptionalOptionalOptional
True test force10N20N30N50N98N
Diameter22mm22mm22mm22mm22mm
Length150mm150mm150mm150mm150mm
Resonator rod diameter2.4mm2.4mm2.4mm2.4mm2.4mm
Maximum surface roughnessRa<3.2μmRa<5μmRa<5μmRa<10μmRa<15μm
Minimum workpiece weight0.3kg0.3kg0.3kg0.3kg0.3kg
Minimum thickness of workpiece2mm2mm2mm2mm2mm
Probe ApplicationsIon nitrided punches, mold shells, fixtures, thin-walled components, bearings, gear flanks, and pipe inner wallsIon nitrided punches, mold shells, fixtures, thin-walled components, bearings, gear flanks, and pipe inner wallsIon nitriding for punches, mold shells, fixtures, thin-walled components, bearings, gear flanks, and pipe inner wallsMeasuring grooves, gear flanks, and gear rootsSmall forgings, cast materials, weld inspection, heat-affected zones, low roughness requirements
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