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SU-300M Motorized Ultrasonic Hardness Tester

SU-300M Motorized Ultrasonic Hardness Tester

±3% HV, ±1.5HR, ±3%HB
12 month
Delivery Time
ASTM A1038-2017; DIN50159-2009; GB/T 34205-2017

SU-300M Motorized Ultrasonic Hardness Tester is a popular portable durometer made by Sinowon group. It applies method of ultrasonic contact independence to makehardness testing at the spot or in the laboratory.

SU-300M is a perfect portable durometer for hardness testing about the coating and plating, it can measure the hardness of chrome, copper plating, carburized layer andNitriding layer effectively.

SU-300M is a NDT durometer due to the contact indention is too small to observe, it is one of the excellent solution totest hardness of finished products, such as, the mold, gear, shaft, rod, screw, rails, etc. 

SU-300M can not only work with the motorized probes, but also work with the manual probes, which is able to meet the different application in light of different condition of surface roughness.

SU-300Mconformsthe standard ASTM A1038-2005, DIN standard DIN50159-1-2008 and China National standard GB/T 34205-2017.


Perfect Accuracy——±3% HV, ±1.5HR, ±3%HB.

Microscopic Indentation—— Only high-power microscope can observe the indentation.

Quick Measurement——Result in 2 seconds.

Large LCD Display——Directly display measurement result, times count, maximum, minimal, average and deviation.

Friendly Operation——Operate well after short training.

Promised Warranty——2-Year warranty for main unit (Excludes Probe).

Mass Storage——Save 1000 groups measurement data.

Simple Calibration——Save 20 groups calibration data for invoking, improve calibration efficiency.


Commodity Motorized Ultrasonic Hardness Tester
Optional probeMotorized Probe:3N、5N、8N、10N;  Manual Probe:10N、20N、49N、98N ;
Measuring RangeHBW:100-650; HV:100-1500; HRC:20-68; HRB:55-100; HRA:37-85; Mpa: 255-2180N/mm

Measuring Accuracy(%)

Hardness ScalesVickers(HV);Rockwell C(HRC); Rockwell A(HRA); RockwellB(HRB);Brinell(HB)
LCDColor Screen
Data DisplayLCD Backlight, Adjustable
LanguageChinese, English, German, Portugese, Turkish
Data OutputRS232 Hyper Terminal/Bluetooth Printer
Data StorageTo save 1000-groups of measuring data and 20-groups of calibration data
Word inputLetters and numerals
Working EnvironmentTemperature: -10°C to 50°C Humidity :30%-80% R.H.
Battery VoltageRechargeable lithium battery ; Voltage :4.2V, 4800mAh
Recharger VoltageAC220V/50Hz, 110V/60Hz
Main unit Dimension and WeightMain unit Dimension :160 x 80 x 30mm (L x W x H);Manual Probe:Φ22×153mm ; Weight(No Probe): 0.5Kg
Packing Dimension and WeightPacking Dimension 320 x 430 x 155mm (L x W x H) ; Packing Weight (Standard Delivery)4.3Kg

Standard Delivery:

Product NameCode #Product NameCode #Product NameCode #
Instrument Main Body882-141M10N Motorized Probe882-251Anti Vibration Case882-901
Standard Rockwell Block882-641Probe Cable882-801Screw882-951
USB Recharger882-851COM Cable882-810Operation ManualSU-300M
Qualification CertificateSU-300MPacking ListSU-300MWarranty CardSU-300M




Test samples and requirements:

Measured workpiece: Bearing (Figure one)

Product dimension: 1~49mm(internal diameter)

Product material: ISO683-17

Hardness requirement: 60~65HRC

Measurement requirements: Fully check the hardness of the bearing

Instrument used: Motorized ultrasonic hardness tester SU-300M

Figure 1. Bearing


                                                Figure 1

The company is the world's top bearing manufacturer, Japan's NSK Group, in Shenyang, China. It mainly produces high-quality bearings and guide rails. Figure 2, Bearing manufactured from the company.

Hardness is one of the important indicators of the quality of bearings and guide rails. 

As the world's top bearing manufacturer, its control of bearing hardness is very strict. The choice of hardness tester directly affects the quality of bearings and other products.

Sinowon SU-300M Motorized Ultrasonic Hardness Tester has won their love and high praise.

  Figure 2



1. The customer needs a hardness testing solution with precision, fast-speed and NDT . It is known that Rockwell hardness tester has a large indentation, and the measured product cannot be used after the testing. It is not suitable for mass nondestructive measurement or full inspection.

2. Vickers hardness tester need operators with experienced skills and low efficiency, and it is not suitable for customers to test large quantities of products.

3. Portable Leeb hardness tester is not suitable for such small parts due to the diameter is too small to test.


Our Solution

According to the current pain points of measurement, we decided to use an ultrasonic hardness tester to measure the sample.

Sinowon Ultrasonic Hardness Tester SU-300M adopts 3N test force, which can fully inspect the hardness of the motor shaft without damaging the workpiece, effectively guaranteeing the production quality of the product.


Test conclusion



 SU-300M is able to measure the hardness of hardness of small cylindrical workpieces with precision, fast-speed and NDT solution.

 SU-300M ultrasonic hardness tester has simple operation and high reliability. It only needs to prepare a standard sample to calibrate the   instrument, which can achieve accurate hardness measurement.

 While using the ultrasonic hardness tester to improve the quality control of the enterprise, it also reduces the loss and increases the profit of the enterprise.

Calibrationhttps://www.youtube.com/watch?v=lw9C2R3orNA&t=12s  ( Here is a video made up for helping you use our UCI )

Usagehttps://youtu.be/cKfTnwwc38Q ( Here is a video made up for helping you use our UCI)

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