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Fluxgate Magnetometer FGM-301



  • High Accuracy
  • High Resolution
  • High Reliability
  • Low Noise
  • Low Power
  • Small Size and Weight
  • Two Year Warranty
  • Engineering Support

The FGM-301 is the best product for measuring DC and low frequency magnetic fields in three dimensions. This is a compact magnetic sensing device suitable for a wide variety of magnetic field measurement applications. Being an analog sensor, the FGM-301 provides high resolution and low signal delay. This product is far more stable and linear than magneto-resistive and magneto-inductive magnetometers.

Watson Industries has been developing state-of-the-art fluxgate magnetometers for almost thirty years to provide the FGM-301. As a result, this magnetometer is relied on for precision measurements from pole to pole in very critical projects.


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Range: X, Y, Z±700 mGauss±70,000 nTesla
Analog Scale Factor:±200 mGauss/V±3.5V Output
Scale Factor Accuracy:2%
Scale Factor Matching Between Axes:< 0.2%
Scale Factor Temp Coefficient:±100 ppm per °CTypical
Bias: X, Y, Z< 5 mGauss
Non-Linearity:< 0.01%
Bandwidth:30 Hz
Noise:< 0.3 mGauss rms (Typical)<10 uGauss in 1 Hz bandwidth
Output Ripple:< 0.2 mGauss P-P


Temperature: Operating-50°C to +85°C
Temperature: Storage-50°C to +85°C
Vibration: Operating3g rms100 Hz to 1 kHz
Vibration: Survival4g rms100 Hz to 1 kHz
Shock: Survival200g10mS ½ sine wave


Input Power:6 to 16VDC0.4W
Input Current:45mA
Analog Output:±3.5VDC
Analog Output Impedance:1000 Ohm


Axis Alignment:< 0.3°
Size: Including Mounting Flanges1.0W x 4.18"L x1.0"H2.5 x 10.6 x 2.5 (cm)
Weight:3.1oz (0.2lb)90 grams (0.1Kg)
Connection:9 pin male "D" subminiature
Life:> 50,000 Hrs MTBF
Specifications are subject to change without notice.
This product may be subject to export restrictions. Please consult the factory.