The device comprises a first
electrode plate, a
handle, an
electromagnetic shielding cover, a
rubber ring with insulating paste, an
adhesive layer, a patch, a microneedle and the like. The first
electrode plate is connected with a constant-
current source of a
body composition measuring instrument through a lead; the microneedle penetrates through the
adhesive layer and the
tail end is connected with a detection device. According to the device, transverse current on the
skin surface is blocked through insulating paste,
contact resistance is reduced through conductive gel, electromagnetic disturbance is reduced through a shielding cover, and
skin resistance and
capacitance are completely detected through cooperation of microneedles and a first
electrode plate. By means of the measurement condition with the stable contact state, stable and credible
skin impedance data can be obtained, the
body fluid resistance value of the
human body can be obtained by combining
body composition measurement and skin resistance removal, and the three advantages of microneedle detection,
skin impedance measurement and
body composition impedance calculation are achieved.