Equotip 550 UCI Portable Hardness Tester

The Equotip 550 UCI is a flexible UCI hardness tester for fine-grained material with any shape and heat-treated surfaces. The patented adjustable test load enables a wide range of applications. The Equotip 550 features a rugged touchscreen with enhanced software features and analysis functions.


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Product Information

The UCI Measuring Principle

The UCI (Ultrasonic Contact Impedance) method uses the same pyramid-shaped diamond as a conventional Vickers hardness tester. Unlike Vickers testing, no optical evaluation of the indentation is required, enabling fast and portable measurements. The UCI method excites a rod into an ultrasonic oscillation. The test load is applied by a spring and typically ranges from 1 to 5 kg of force (HV1 – HV5). As the diamond is forced into the material, the frequency of the rod oscillation changes in response to the contact area between the diamond and the material under test. The instrument detects the shift in frequency, converts it to a hardness value which is immediately displayed on the screen.


  • Standard to large objects
  • Round objects
  • Light objects
  • Very hard objects
  • Heat treated surfaces
  • Polished objects
  •  Additional Applications :
    • Steam turbine generator
    • Thermal cutting


Your Benefits
Combine with Leeb and Portable Rockwel Combine with Leeb and Portable Rockwell
On-screen feedback to reduce measurement inaccuracies caused by the operator On-screen feedback to reduce measurement inaccuracies caused by the operator
Ready-to-go reports through powerful built-in reporting feature Ready-to-go reports through powerful built-in reporting feature

Native Scale



Measuring Range

20 – 2000 HV


Measuring Accuracy

± 2% (150 – 950 HV)


Available Scales



Available Probes

UCI (Adjustable HV1 – HV5)


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
  • Profile view
  • One-step calibration
  • Automatic compensation for impact direction
  • Personalized user profiles and views
  • Integration in automated testing environments (incl. remote control)
  • 11 Languages and timezone supported
PC Software Equotip Link allowing direct reporting and custom reports
Display 7” color rugged touchscreen unit (800 x 480 pixels) with dual core processor
Memory Internal 8 GB flash memory (> 1’000’000 measurements)
Connections USB host / device and Ethernet


  •  DIN 50159
  •  ASTM A 1038
  •  ASME CRTD-91
  •  DGZfP Guideline MC 1
  •  VDI / VDE Guideline 2616 Paper 1
  •  Nordtest Technical Reports 424-1, 424-2, 424-3


Measurement Accessories
  • Equotip UCI Probe HV1-HV5 (356 00 700)
  • Equotip UCI Special Foot (356 00 720)
  • Battery complete (327 01 033)
  • Quick Charger (external) (327 01 053)
  • 2-in-1 Kits Special Offers: Equotip 550 Portable Rockwell & UCI Kit (356 10 020), Equotip 550 Leeb D & UCI Kit (356 10 022)
Verification Tools Equotip UCI Test Block ~850HV, ISO 6507-3 HV5 Calibration (357 54 100)