How to choose a suitable UCI probe and kits for the hardness testing application?


Firstly, it must be known what material is tested, please check the typical application in the following table, it will be helpful to choose right probe. If there is coating or plating on the specimen, it is better to choose the motorzied probe with minimum testing force, but you must consider the roughness of surface. If the roughness is high, the light force probe is not suitable.

Secondly, if the specimen is small and massive, it is better to choose a stationary stand to make the testing reliably.

Thirdly, if the specimen is a cylinder-shape, it is better to fix the probe in a small/ large cylinder kit, or MU-200 portable stand, it will be benefical to get a credible testing result.

Fourth, if the specimen can not be reached by the standard length probe, it is able to test it in the lengthen manual probe or motorized probes. If it is inside wall of some turbines or pipes, it is able to use the manual shorten probe to complete the testing.

Force Model Control Probe Style Stands and Kits Typical Applications
98N HP-10K Manual Standard length MU-100H



Small-cylinder-kit Large-cylinder-kit


Standard probe cap

Deep-hole probe cap

Small forgings, cast material,

weld inspection, HAZ

50N HP-50K Induction hardened or

carburized machine parts,

for example, camshafts,

turbine weld inspection, HAZ

Measurement in grooves, on gear tooth flanks and roots, turbine blades

20N HP-20K Standard length

Lengthen length

Shorten Length

Ion-nitrided stamping dies and molds, forms, presses,thin walled parts

Bearings, tooth flanks, turbine blades, inside wall of pipes with Ø >110 mm

10N HP-1K
10N MP-1000 Motorized Standard Length MU-200M



Motorized V-Kit

Finished precision parts,

gears, bearing raceway

8N MP-800
5N MP-500
3N MP-300 Thin layers, for example, copper or chromium on steel cylinders;

Copper rotogravure cylinders;

Coatings, case hardened parts