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Hardness Testing

Equotip 550 UCI

The leading Ultrasonic Contact Impedance measurement system with advanced capabilities

  • Unmatched versatility owed to HV1, HV5, and HV10 test loads in a single probe
  • Patented adjustable test load for higher accuracy on a wide range of applications
  • Powerful measurement device on the market packed in a rugged chassis


Ultrasonic Inspection of Welds / Ultrasonic Inspection of Cast and Forged Metals / Heat-treated surfaces

Adjustable test load and a rugged touchscreen with enhanced software and analysis features
Efficiency to the power of 2 thanks to three loads in one single probe HV1, HV5, and HV10 and possible combination with Portable Rockwell and Leeb in one device.
Features with wizards, user guidance, personalised views, and on-screen feedback to reduce measurement inaccuracies that can be caused by the operator.
User Experience
User guidance, smart material, and probe selection wizards, and ready-to-go reports through a powerful built-in reporting feature facilitate even short measurement campaign.

SWISS MADE_horizontal lockup.svg
Software for Equotip 550 Platform
Equotip 550 Platform
Tech Specs
Equotip 550 Platform
7” color capacitive touchscreen

Instrument protection
- IP54, fully rugged with shock absorbing casing,
- Scratch-resistant Gorilla® Glass screen protection,
- Circuit and connector protection against dust, debris, chemicals and voltage spikes
- Foldable additional screen cover for additional protection during storage and transportation

Internal 8 GB flash memory (> 1’000’000 measurements)

Combination with another testing method
Leeb, Portable Rockwell (PRT)

Ethernet & USB-B (PC connection), USB-A (PRT), Probe-specific slots

3.6V, Li-Ion, 14’000 mAh

Battery lifetime
> 10h (in standard operating mode)

Charging time
< 9h, < 5.5 h (External quick charger)

Power input
12V +/- 25% / 1.5A

250 x 162 x 62 mm / 9.87 x 6.37 x 6.44 in

1’525 g / 3.35 lbs. (incl. battery)

Humidity operation
< 95% RH, non-condensing

Operating temperature
(-) 10°C + 50°C / 14°F – 122°F


Equotip 550 Software Features
- Heat-Affected Zone (HAZ) maping tool
- Fully customizable reporting
- Customizable views
- Verification wizard
- Measurement wizard
- Mapping wizard
- Integration in automated testing environments (incl. remote control)
- Custom conversion curves (1-point, 2-point, polynomial)
- Built-in pdf creator

Conversion curves applicable for materials
- Steel and cast steel
- Aluminium
- Titanium Ti 6Al 4V
- Cast Iron
- Incoloy 825 / 2.4858
- 304L/1.4307
- Alloy 75/2.4630
- P/T91

English, German, French, Italian, Spanish, Portuguese, Turkish, Chinese, Korean, Russian, Japanese, Polish, Czech

Regional settings
Metric and imperial units, multi-language and time-zone

Audio support
Full digital audio

Desktop Software (Windows)
PC Software
Equotip Link for data download, management and export (CSV, PNG), Conversion curve management, and for upgrades of constantly expanding Equotip and Equotip Link Software

Language support
English, Chinese, Czech,German, Spanish, French, Italian, Korean, Japanese, Polish, Portugese, Russian, Turkish
Equotip 550 UCI Tech Specs
Tech Specs
Native Scale

Conversion scales
HLD, HB, HRC, HRA, HRB, HR15N, HR15T MPA (σ1, σ2, σ3)

Measurement range
20-2000 HV

ISO 6507-2 compliant, 136° Vickers diamond

Impact energy / Test force
HV1 (9.8 N), HV5 (49 N), HV10 (98N) in one probe

Accredited calibration
ISO/IEC 17025

Standard compliance
ASTM A1038
DIN 50159
GB/T 34205

DGZfP Gudeline MC 1
VDI / VDE Gudeline 2616 Paper 1

Conversion standards
ISO 18265
Proceq's own conversion curves

Measurement resolution
1 HV(UCI), 0.1 HRC

Measuring accuracy
± 2%

Measurement deviation (E)
Lower than DIN 50159 & GB/T 34205

Coefficient of variation (R)
Lower than DIN 50159 & GB/T 34205

245 g / 8.6 oz

155 x ø 40 mm (6.1 x ø 1.57 inches) without foot
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Standards & Guidelines


  • Arrow, click names to download Standards & Guidelines ASTM A 1038
  • Arrow, click names to download Standards & Guidelines ASTM A 370
  • Arrow, click names to download Standards & Guidelines ASTM E 140
  • Arrow, click names to download Standards & Guidelines DIN 50159
  • Arrow, click names to download Standards & Guidelines GB/T 34205-2017
  • Arrow, click names to download Standards & Guidelines ISO 18265


  • Arrow ASME CRTD-91
  • Arrow DGZfP Guideline MC 1
  • Arrow Nordtest Technical Reports 424-1, 424-2, 424-3
  • Arrow VDI / VDE Guideline 2616 Paper 1

What influence does the chemical composition of a certain steel group has on the UCI measurement?

For example, will the result be different on 100Cr6, 100CrMnSi6-4 or 100CrMnMoSi8-4-6 ?

All the mentioned steel compositions have similar values of Elastic modulus (E), therefore the results will not be strongly affected...

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What is UCI particularly good for?

Inspection of HAZ (Heat Affected Zones) especially used in oil and gas in industry, inspection of lighter objects where Leeb can not be used due to weight limitation, inspection of areas that can not be reached by anything...

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What parameters are important when choosing the right UCI Probe?

There are several important parameters that shall be taken into account when selecting the UCI probe:

Minimum thickness of the object
If a coating is tested, then also the minimum thickness of the “coating“ which...

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What is the most used Load?

The HV5 (5kgf, 49.05 N) load is the most commonly used, especially within the Oil and Gas industry.

How to extend the UCI Probe's longevity?
  • NEVER impact the surface with the probe, it may damage the diamond tip
  • NEVER slide the probe along the surface after initiating a penetration, it may damage the diamond tip
  • Regular service and verification in service...
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