The amorphous material Co-based wires as the sensing element in Vacquier type sensor was studied. The magnetic material used in these sensors is CoFeSiB wires produced at the harbin Institute of Technical Physics and prepared by melt extraction. The sensor's functional parameters were measured. The sensor sensitivity is 3.1mV/μT. The measurements demonstrate the usability of the sensor in a magnetometer for both continuous and alternating magnetic field measurements.