The invention provides a portable device for conducting resistance tester,Including,One host,A probe pipe is arranged at the front end,The front end of the probe tube is provided with an opening；1. Equipment composition,Installed in the test pipe,It has a sounding hornA microphoneI. pressure pumpI. pressure gaugeOne reflex horn；An expansion element,A variable volume sleeve is arranged outside the probe pipe；When the host conducts immittance test,The expanding element can inflate and expand to seal the ear canal mouth,To ensure the effect of inspection and reduce the time for adjusting the fitting of ear canal.本創作係提供一種導抗檢查儀手持機，包含有，一主機，其前端設置有一探管，該探管之前端具有一開口；一設備組成，裝設於該探管內，具有一探管音喇叭、一麥克風、一壓力幫浦、一壓力計、一聲反射喇叭；一膨脹元件，體積可變的套設於該探管外側；當該主機進行導抗檢測時，該膨賬元件可以充氣膨脹對耳道口進行密封，以確保檢查的效果並降低調整耳道口密合度的時間。
