Magnetometer Sensors

Model 1540

22-bit 3-Axis Fluxgate Magnetometer
Model 1540

The Model 1540 is a high-speed 3-axis fluxgate magnetometer employing 22-bit analog-to-digital converter.

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The Model 1540 system communicates over a bi-directional serial interface using TTL logic levels and RS232 levels. The system can be optionally configured to communicate with the RS422 protocol.

An autosend data mode is included in the Model 1540 software. When this mode is active, data is repeatedly sent out the serial port automatically after power is applied to the system.

The Model 1540 is packaged as either a cylinder (1” diameter and 4.725” length) or as a rectangular package (Model 1540S).

Fluxgate magnetometers measure the Earth’s magnetic field and thereby determine the orientation. Also, magnetometers measure fluctuations in the earth’s magnetic field or other magnetic fields such as those generated by the human body.

Fluxgate magnetometers employ a saturable core driven by a high frequency carrier parametrically up convert low frequency magnetic field variations to sidebands on the carrier. This approach produces a low noise, high accuracy sensor. The magnetometer electronics consist of a miniaturized 3-axis servo system which nulls magnetic field changes applied to the saturable cores. This design produces a very linear response over the entire dynamic range of the system.

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