The instrument is used to measure the thermal conductivity of various refractory fiber products, insulating bricks and heat insulation boards. It is manufactured according to the basic principle of Fourier one-dimensional plate stable heat conduction process. The equipment is manufactured according to Yb / T 4130 "thermal conductivity test method (water flow plate method)". IPC industrial computer can be selected for automatic control. It has friendly interface, high temperature control precision, dynamic real-time data curve, and the original data can be converted into excel storage format, and the test report can be read and printed at any time.