A sensitive magnetometer whose fluxgate transducer is assembled using finished winding components produced by the radioelectronics industry is described. The maximum scale value of the magnetometer is 100 μT; the self-noise does not exceed 10 nT. During 8 h of operation, the zero shift is no more than 10 nT. At an 18-V supply voltage, the input dc is no more than 45 mA.