Regarding measurement of electric contact

Probe Structural Difference

Outer Spring Type - Spring is assembled outside

  • Intrinsic resistance is hardly varied even with a long period of use.
  • High current can flow due to its large cross-section.
  • Expansion / contraction of components, which is caused by heat from friction or electric charge, would not affect intrinsic resistance.
Test of the durability up to 10 million times of hits
Test of the resistibility against the temperature from -70℃ to 100℃

Suitable for measurements that require precise readings or that are performed under high current.

Comparative example of resistance

resistance Contact frequency
Outer Spring Type Inner Spring Type
15mΩ or less About 480,000 times It is not possible to use it.
30mΩ or less About 1,870,000 times About 30,000 times
100mΩ or less About 2,270,000 times About 50,000 times

<NOTE>This data is based on our experiment. The result is differentdepending on the material of measurement object,the surfacetreatment and shape,the current value when measuring it,thevoltage value when measuring it,the temperature. Please see to the last as material for the comparison.