Answer:
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
MU-200H MU-300H Small-cylinder-kit Large-cylinder-kit Plane-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 |
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| 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 |
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| 10N | HP-1K | ||||
| 10N | MP-1000 | Motorized | Standard Length | MU-200M
MU-300M MU-400M 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 |