In some special measurement environments, such as complex land conditions, high temperature measurements, and low temperature measurements, some problems cannot be solved. Only heat-resistant alloy (such as stainless steel, Kama, iron chromium aluminum, etc.) foil can be used as the substrate for strain gauges, and welded or strain gauges can be made. The strain gauges are subjected to sufficient high-temperature stabilization treatment indoors and then welded to the tested object using a small specialized welding machine.