Feature: measure the working length of the tooth by DC resistance, accurate measure even in dry or wet abient.

Apply to: measure the length of all kinds of pulpitis, pulp necrosis, priapical priodonpitis, measure the length of transplanting or replanting tooth.

Technical parameter:

1.detect range:0,0.5,1.25,2.0.

2. detective precision: the tolerance of corresponding DC resistance will not more than ±10% when display the above ＆#118alue.

3.sonar alert: when the ＆#118alue is ≤0.5, there will be sonar alert.