Ultrasonic Contact Impedance Hardness Tester – UH200

  • Ultrasonic Contact Impedance Hardness Tester
  • Ultrasonic Contact Impedance Tester is used in a wide variety of industries including manufacturing, oil and pipe, construction and more.
  • Ultrasonic Contact Impedance Tester provide a wide range of benefits including high HV hardness test range, large LCD screen and quick measurement results.
  • Ultrasonic Contact Impedance Tester comes standard with a manual test probe of your choice.
  • Ultrasonic Contact Impedance Tester can be upgraded to have a motorized test probe of your choice.


Ultimate User-Friendliness
Ultimate User-Friendliness
Leading Dependability and Reliability
Leading Dependability and Reliability
NIST Certified Consumables
Strict Compliance with Industry Standards
Stocked Consumables and Spares
Stocked Consumables and Spares
Trusted After Sales Technical Support
Trusted After Sales Technical Support
Lifetime Product Support Advantage
Lifetime Product Support Advantage


The UH200 non-destructive ultrasonic hardness tester, relying on the principle of ultrasonic vibration sensor rod, can easily and swiftly detect the material hardness of several metals without any damage.

This method produces no indentation and it has both high precision and speed. It makes use of a single chip technology and advanced sensing system which makes it better than the usual ultrasonic hardness testers in both function and structure. UH200 support value conversion among HV, HB, HRC, and others and the average of the multi-point measurement can be derived. Accurate display and printing of the results is also possible. It is popularly used in testing hardness of metal foil, finished workpiece, metal thin layer (electroplating layer, carburizing layer, nitriding layer, etc.), the special shape parts are easy to dismantle but the hard parts are difficult to move. It is a good equipment for testing precision to save cost and improve production pass rate.

Working Principle

Ultrasonic Contact Impedance Tester is used in a wide variety of industries including manufacturing, oil and pipe, construction and more.
Industries Using Ultrasonic Hardness Tester

The ultrasonic hardness tester has a hand-held host and probe connected with the cable. The probe contains a vibration bar to connect the Vickers pressure head. The vibrating bar produces ultrasonic vibration, after the boot, the frequency of the vibration is fixed to the sensor on the vibrating bar to sensate, the probe head lower end is pressed into the material surface tightly, the micro-vibration rod to the shock to the material Microcrystal, to enable the grain vibrate at different frequencies, it will result in resonance once there is a synchronization of the two vibration frequency, this makes it possible for the sensor to detect the resonance frequency before and after. The value of the material hardness can be calculated based on the number of frequency change and the elastic modulus of the material.

UCI System Demonstration and Calibration Video


Ultrasonic Contact Impedance Tester provide a wide range of benefits including high HV hardness test range, large LCD screen and quick measurement results.
Benefits of UCI

The Ultrasonic Contact Impedance (UCI) tester is used for measuring the hardness value of small items, objects with a thin wall, complex forms, and to measure the hardness of surface hardened layers.

The built-in camera allows user to picture of testing object and mark tested area with corresponding hardness value.

UCI Hardness Tester has the sealed housing with rubber protective strips. It is ideal for use in workshop, and in-field conditions with high humidity, dust, etc. The hardness tester has frost-resistant display, which allows user to use the device at any season and in any virtually any climate zone. The device has PC software with a comfortable and intuitive interface.

  • Highest Accuracy - ±3% HV, ±1.5HR, ±3%HB
  • Microscopic Indentation - Indentation can be observed by high-power microscope only
  • Quick Measurement - Result in 2 seconds
  • Large LCD Display - Direct display of measurement results, time count, maximum, minimal, average and deviation.
  • User-Friendly Interface - The system is easy to learn and operate even after short training
  • 2-Year Extended Warranty for the Main Unit (Excludes Probe)
  • Large Storage Capacity - Saves up to 2000 groups of measurement data
  • Simple Calibration - Saves up to 20 groups calibration data for invoking and improve calibration efficiency.
  • Hardness measurement of any mass products with a thickness of over 1 mm - inaccessible to the dynamic (Leeb) hardness testers (small parts, thin-walled structures, pipes, tanks, steel sheets, articles of complex shape, hardness control of metal coatings, etc.)
  • Measuring the hardness of the surface hardened layer
  • Small imprint after measuring (mirror surfaces of shafts necks, blades, gear teeth, etc.)
Ultrasonic Contact Impedance Tester comes standard with a manual test probe of your choice.
Ultrasonic Hardness Tester's Manual Probe: 1/2/5/10kgf
  • Wide range of hardness testing
  • Various measurement modes
  • Calibration of any scale in any range
  • Convenience and ease for measurement
  • Optimized number of buttons
  • Large full color graphic display with bright back-lighting
  • Calibrations stored in memory of probe
  • Internal memory and communication with PC
  • New, intuitive menu with tips on the buttons
  • Optional wireless mini printer
  • Water resistant case
  • Rubber protected bumper
  • Graph - the mode of building of graph
  • Histogram - the mode of building of histogram
  • Statistics - the mode of statistic
  • Smart - the mode of filtering of incorrect measurements

UCI method for the hardness testing:

Ultrasonic Contact Impedance Tester can be upgraded to have a motorized test probe of your choice.
Ultrasonic Hardness Tester's Motorized Probe: 0.3/0.5/0.8/1kgf

The UCI hardness measuring method complies to ASTM A1038. The ultrasonic contact impedance (UCI) probe is purposed to be used for hardness measuring testing areas with minimal thickness (starting from 1 mm). It is specifically designed for objects of complex surface shape, and for measuring surface hardened layers hardnesses.

This method is very fast and easy: place the probe on the tested object surface, press the probe with the required effort to the surface and save the hardness value, shown on the display of the device. Small size diamond indenter allows measuring hardness value of all items thicker than 1 mm. The UCI method of hardness testing is the least destructive because the hardness tester with UCI probe leaves much smaller prints (imprints) than the majority of bench hardness tester would. That's why a portable hardness tester with UCI probe is the best choice. The unit comes with CE certificate of conformity for Portable UCI Hardness Tester.

Technical Specification:

Product Name UH200 – Ultrasonic Hardness Tester
Model UH200
Loading Force 5kgf manual probe (optional 1/2/10kgf manual probe)
(optional motorized probe: 0.3/0.5/0.8/1kgf)
Measuring Range Main Line: HB: 85-650; HV 10-2980 HV; HRC 20-70; HRB: 41-100; HRA: 61-85.6 HS: 34.2-97.3; Mpa: 255-2180N/mm

Economical Line: HRC(10-80) HB (200-550) HV (200-999)
Hardness Scale HV, HB, HRC, etc.
Measuring Accuracy HV: ±3%HV; HRC: ±1.5HRC; HB: ±3%HB
Indenter 136° Vickers Diamond Indenter
Measuring Direction Support 360°
Hardness Indication LCD display
Data display Loading force, Testing-times, Testing result, Average, Maximum, Minimum, Deviation and Conversion scale.
Data Storage Saves 2000 groups of measuring data and 20groups of calibration data
Operating Environment Temperature: -10℃~50℃; Humidity: 30%~80%R.H
Operating Voltage DC 6V
Dimensions Machine: 160x80x31mm; Packing: 35x35x15cm
Net Weight Approximate 500g (Without probe)
Gross weight 5kg (After packing with standard accessories)

Standard Package:

Product Name Q'ty
Main Instrument 1
5kgf Manual Probe 1
USB Cable 1
Probe Cable 1
Probe Silicone Cap 1
Instrument Manual 1
Accessories Box 1
Certificate 1

Instrument Maintenance

Be cautious when using it to avoid any damage

In a strong magnetic field the accuracy of the precision sensor measurement will be reduced. While in use or after use, it is very essential to keep the instrument away from strong magnetic materials or fields.

request a quote
Request Quote


The surface roughness of your material depends on the type of probe you are hoping to test with. The below chart does an excellent job guiding you in the right direction based on your desired probe type. NOTE: HP-1K = 1kg probe, HP-2K = 2kg probe, etc.

Ultrasonic Contact Impedance Hardness Tester - UH200

Please refer to the below calibration steps for your Ultrasonic Hardness Testing System:

Step 1:
There are two HRC Blocks, one is 26.5, the other is 61.9. (Please check your block which may have a different value).

Step 2:
Measure the higher value hardness block first a few times. This will offer you a calculation of the average value. Note it down.

Step 3:
Press the "Set" button, the display shows "E". That is the set state. In this case, if you press the SET button, there will be 4 group values. First: the high block value 61.9; second: the high profile value (which may be around 45 - this is set by factory to guarantee accuracy; third: the Low block value, 26.5; forth: is the low profile value, (which may be around 14 - this is also set by the factory to guarantee accuracy).

When you calibrate the system, you need to only adjust the High profile value and the low profile value to correctly adjust the systems calibration. If on the first step when running your tests, you get a high average value of for example, 65; you need to adjust the high profile value to a higher value. It won't be (65-61.9=3.1), however, it may be 1,2,1.5,2.5. You will need to try it a few times to find the accurate value until you get your hardness block value of 61.9.

When calibrating the low value, the same process applies. Adjust the profile value to a higher value, when the test value is lower than the block value.

There are a few factors that may affect the reading accuracy. They include thickness, hardness, weight and also surface roughness. Please refer to the below roughness table for reference.

UCI Testing

Here are the two most important questions we ask our clients to answer to help offer the optimal solution for their UCI needs.

#1 What are the hardness ranges of your materials?

#2 Would you happen to know the surface roughness of your materials?

Contact us today and one of our qualified representatives today to get the help that you need with the right solution for your Ultrasonic hardness testing requirements.

When performing UCI testing on harder and thinner materials of around 3mm because knives typically have a very high hardness, a 2mm or 3mm (1/8") thickness can be accurately tested directly. For example, gears and knives are typically hardened materials with hardness values in the carbide ranges. Provided the specimens are over 2mm thick, the operator is not required to stack the materials in order to gain accurate reading results.

Please refer to the below picture example of an abrasive cutting wheel with a 2 mm thickness tested on our UH200 model.

UCI Testing

When performing the Ultrasonic Hardness Test while testing thinner materials, in the 2-5mm range, an excellent solution is to stack the specimens to increase thickness. The goal is to bring the thickness over 5mm (0.2"). This will drastically improve your accuracy.

The same concept applies to the specimen's weight. In order to optimize accuracy, the weight of the specimen should be over 300g. Should your specimens be lighten than 300g, a stacking option may be highly beneficial to meet this weight requirement. This too will improve your testing result accuracy.

The Ultrasonic tester can get the HV scale directly, and support conversions for the following scales and ranges:
HBW (85-650) / HRA (61-85.6) /HRB (41-100) /HRC (20-70)/HS (34.2-97.3), etc.

The UH200 model offers operating temperature between -10*C - +50*C. Additionally, the unit can be stored within temperature ranges of -30*C - +60*C.

The UH200 ultrasonic tester comes standard with a Brinell scale which it automatically converts and displays hardness readings on the unit. Simply set the scale to HBW and the unit will take care of the rest.

NextGen's Ultrasonic hardness tester offers HV scale range of 8-1500 HV for the Main Line model and 200-999 for the Economical Line model.

Krautkramer Mic 10 tester is a German engineered unit. They have an overall good market presence for over 10 years. Based on our most recent competitive research, the technology is somewhat out of date with the primary design being virtually identical to what it was when first manufactured.

UH200 offers a unit that provides your facility with a machine offering the same functions. The difference is our improved ease of use and accuracy. The major difference, however is the price. Request quote today to learn more.

Using a Vickers indenter and ultrasonic technology, the hardness tester is first calibrated using a sample of known hardness. The working principle, in short, is the use of an oscillating rod inside your hardness probe. When you apply force to the indenter on your sample, you change the frequency of the oscillating rod. By doing this, and having calibrated using the sample of known hardness, the ultrasonic hardness tester can compare and determine your material hardness.

While the UCI tester does use a Vickers indenter, the instrument will provide values in Vickers, Brinell and Rockwell (HRC and HRB). With the UH200 UCI portable hardness tester, you can set and forget about constantly requiring to change your favorite scale.

With a variety of hardness probes requiring different forces, the ultrasonic contact impedance hardness testing system is prepared to test on applications as delicate as metal foil and reach as far as finished work pieces, electroplating layers, carburizing layers, nitriding layers and other heat treat hardness testing requirements.

The main accessories available for the UH200 ultrasonic hardness testing instrument include a variety of probes. There are manual as well as automatic motorized probes. Probes for hard to reach areas with long needle point indenters and shorter probes for getting into tight spaces. We also have a variety of forces available for our probes which require different loading forces before a measurement is ready. This is especially useful when you are looking to UCI test more fragile specimens.

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