Test device for conductivity and electric equipment

The present invention provides a test device for conductivity and electric equipment. The test device comprises: a square wave generation source used for generating a square wave signal; a first filter circuit connected to the square wave generation source and used for acquiring a sinusoidal signal without a DC component; a test electrode unit which comprises two groups of test electrodes connected in parallel, is connected to the first filter circuit, and is used for applying a test voltage to medium to be tested; a current detection circuit used for detecting a current signal flowing through the test electrode unit, and converting the detected current signal into a voltage signal; a switching circuit connected between the test electrode unit and the current detection circuit; and a signal processing circuit used for determining the conductivity of the medium to be tested. The technical scheme of the present invention can accurately test the conductivity of the medium to be tested on the premise of avoiding the test electrode from being polarized, and can avoid the problems of inconvenient test and inaccurate test result caused by adoption of one group of test electrodes.