One of the magnetometric survey methods is gradiometry. In this method, the tensor can record the intensity of the magnetic field in the desired direction and also eliminate the effect of temporal changes in the Earth's magnetic field. In this way, the resolution can be increased. In this study, four MEMS sensors with the cross shape geometry are set up. Then the survey has been performed on an iron ore deposit near the village of Divandareh city. Simultaneously with these measurements, a magnetic survey was conducted on the same profiles for validation of the outcome. Finally, the full tensor matrix was obtained for all data along with the survey profile. The results showed that the gradiometric survey using MEMS sensors has a great capability of measuring the full tensor of the Earth’s magnetic field and benefits from their advantages compared to the proton magnetometer like low weight, small size, high sampling rate, and low power consumption.