This invention discloses a magnetic detection device and a detection method using the same. The magnetic detection device comprises an excitation unit for generating an excitation signal a sensing coil set including an excitation coil excited by the excitation signal to generate excitation magnetic field having applied field intensity a coupling coil and a container for receiving a detection target containing a magnetic substance, wherein the detection target has magnetic clusters the coupling coil senses the electromagnetic field cause by the extra AC electromagnetic coefficient generated by the magnetic clusters magnetized by the excitation magnetic field and the AC electromagnetic coefficient has a time vibration magnetization (M(t)) related to H a magnetic sensor having an input coil and a magnetic detector, wherein the input coil senses M and the magnetic detector detects a time dependent phase delay ([theta](t)) and a calculation unit for analyzing [theta] to derive a time-dependent slow response time (teff).本發明揭露一種磁性檢測裝置及使用其檢測的方法,該磁性檢測裝置係包括:產生激發信號的激發單元;感測線圈組,其包含由該激發信號激發產生具有施加場強度的激發磁場之激發線圈;耦合線圈;容納含有磁物質之檢測標的之容器,該檢測標的具有磁團簇,該耦合線圈感應該磁團簇受該激發磁場磁化而產生額外的交流電磁化係數所造成的電磁場,該交流電磁化係數具有相關H的時間振動磁化強度(M(t));磁偵測裝置,係具有輸入線圈及磁偵測器,該輸入線圈感測M,且該磁偵測器測定時間相依相延遲(θ(t));以及分析θ以導出時間相依反應遲緩時間(teff)的計算單元。
