In this article, procedure of designing and manufacturing of a time domain Transient Electro-Magnetics (TDEM) equipment is described. This geophysical equipment consists of several parts, including transmitter, receiver, power generator, transmitter loop, receiver antenna, pre-amplifier, and acquisition parameters setting and data acquisition software. The transmitter with a power of 2000 watts sends a time variable current (square signal) to the transmitter loop. This current produces a primary electromagnetic field, so that it induces eddy currents into subsurface of the earth. whenever the transmitter current is turned off, the eddy currents that have formed beneath the earth surface, will produce secondary electromagnetic sources which the effect of these secondary electromagnetic sources will be received by antenna and after passing through the pre-amplifier will be recorded by receiver. The receiver is able to measure and record the received induced voltages with a range of tens of nanovolts to several volts After processing the data and applying inversion method to each acquired station and gridding produced 1D models, 2D sections with resistivity property of geological features under the earth, up to a depth of several hundred meters, can be concluded.