### Triaxial Fluxgate Magnetometer Tri-Mag 210C10 0500

- Compact and reliable, 10mm high and 22mm wide by 60mm long, suitable for At Bit
- Non-magnetic hermetic seal packaging for fluxgate circuit
- SOI electronics wafer successfully achieving -50℃ to 210℃
- Internal temperature sensor for thermal modeling from -50℃ to 185℃
- Three orthogonal measurement coils together with one permeable core
- Three components to be measured simultaneously at one point in space

Electrical wiring diagram

These voltage pulses from each measurement coil have been sampled and integrated in the circuit, accordance to the integration voltage the circuit supply feedback currents respectively to each of the measurement coils, which produce magnetic field completely offset the magnetic field ,as the result, the magnetic field in the inner of three measurement coils is zero. The triaxial fluxgate is closed-loop measuring, each of three feedback currents is exactly equal to each of three axis magnetic field components.

The At Bit allows the three magnetic field components simultaneously to be measured at the same point in space, and only 10mm thick. The At Bit adapted SOI (Silicon On Insulator) electronics wafer, hybrid circuit technology and non-magnetic hermetic seal packaging. The At Bit is able to work in wide temperature range (-50℃ to +185℃) and to survive over 2000 hours.

**Calibration coefficient after thermal modeling**

The temperature range of thermal modeling is -50℃ to +185℃,the axis alignment is thermal modeled by zero order polynomial, the setoff and scale factor are thermal modeled by third order polynomial.

Each unit will be calibrated before shipping and build up its own calibration coefficients file. To get the accurate X,Y, Z axis component the triaxial fluxgate output voltage shall be calculated with the calibration coefficient.

**Calculation of temperature**

TUM is output voltage of the temperature sensor, the unit is V. T is the current temperature, the unit is ℃.

**Calculation of Scale and Setoff**

**Calculation of three components of magnetic vector**

FXUM, FYUM, FZUM are the output voltage of the triaxial fluxgate, the unit is Voltage. HX, HY, HZ are the three components of magnetic field, the unit is Gauss.