Driving an AI-powered future, we use machine learning translation in this website.

Hardness Testing

Equotip 550 UCI

✔ In stock

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
Software / Workspace App
Tech Specs
Pc Software
Equotip Link allowing direct reporting and custom reports

Internal 8 GB flash memory (> 1’000’000 measurements)
Equotip 550 UCI Tech Specs
Sensor / Instrument
Tech Specs
7” color rugged touchscreen unit (800 x 480 pixels) with dual core processor

Native Scale

Available Scales

Available Probes
UCI (Adjustable load HV1, HV5 and HV10)

Combination With Other Methods
Leeb, Portable Rockwell

Average Roughness Ra (µm / µinch)
12.5 / 500

Minimum Mass (kg / lbs)
0.3 / 0.66

Minimum Thickness (mm / inch)
5 / 0.2

Instrument Firmware
Automatic compensation for impact direction
Personalized user profiles and views
Integration in automated testing environments (incl. remote control)
11 Languages and timezones
Measurement wizards
Custom curve wizard
Combined method wizard
User guidance features
Custom report features
One-step calibration
metric and imperial units support
Profile view
Heat Affected Zone (HAZ) line mapping

USB host / device and Ethernet

Measuring Range
20 - 2000 HV

Verification according to
ASTM A1038, DIN 50159, GB/T 34205-2017, custom method, combined method

IP54, fully rugged with shock-absorbing casing

Custom conversion curves
Yes, 1-point shift, 2-point, polynomial

Coefficient of variation
Significantly lower than the limits set in DIN 50159, ASTM A1038 & GB-T 34205-2017
Other customers also purchased:
Standards & Guidelines


  • Arrow, click names to download Standards & Guidelines ASTM A 1038
  • 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...

See More

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...

See More

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...

See More

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...
See More

Related content