Main features:

Fluxgate magnetometer (FGM) LEMI-036 was specially developed for the super sensitive measurements of 3 components of Earth magnetic field induction and their variations in accordance with new 1-second INTERMAGNET standard. The signals with periods from 1 to 100.000 seconds and more may be collected with reasonable error. In order to realize this design the major attention was paid to such principal FGM characteristics and parameters as frequency response and sampling synchronization accuracy as well as thermal and temporal stability and noise level. To fulfil such mutually contradictory requirements as speed of response and deep suppression of industrial noise, the specific combination of analogue and digital filters was realized in this instrument. The magnetic sensor of flux-gate type, which mainly determines magnetometer stability and noise level, was manufactured with high-tech glass-ceramics having close to zero thermal expansion factor using well-proved technology, which implements recent findings in the excitation circuit construction and operation mode. Using best available voltage references and passive components provides excellent stability of the FGM electronics.