Abstract: Fiber compression device and a serial of one-side electrodes were used to study the factors affecting the electrodes resistance testing, and it’s hopeful to improve wool fiber moisture tester’s design. Experiment results show that the measuring depth is limited and the falling of measuring resistance is finite with the increasing of thickness of random wool fiber assembly. The resistance decreases with the decrease of the distance between electrodes, with the increasing of separation distance of one-side electrodes the variation of resistance increase. The resistance decreases with the increase of electrode area, and with the increase of area, variation of resistance slows down. The resistance decreases with the increase of wool fiber volume density. The measuring depth increases with the increase of applied voltage. The suitable voltage of one-side electrodes is bigger but no more than wool fiber’s local breakdown voltage.

Key words: electrical resistance, one-side parallel electrodes, wool fiber, on-line measurement