| Highlights • High precision absolute field measurements within +/- 1 mT range • Long term stability measurement over 1 week • High precision field orthogonality measurement • Sensor noise measurement at high fields against SQUIDs as a reference • Linearity measurement • Temperature range -20 to 50 °C Equipment • Calibrated 3D-HelmholtzcoM system with 2 m diameter • Tensor SQUID magnetometer/gradiometer • Fluxgates • Variable temperature facility • High precision current source |