The FGM650/10 is a vertical difference magnetometer with a standard measurement range of ±10 μT. It is used in various surface-, underwater- and borehole measurement systems for the detection of magnetic objects, interference fields and signatures in the ground.
The FGM650/10 consists of two single-axis Fluxgates that are aligned vertically to each other in a distance of 650 mm. This alignment allows for differential measurements thus suppressing the Earths magnetic field and global disturbances. The result is an improved detection of object signatures in the ground.
The FGM650/10s rugged aluminum housing makes the sensor also a suitable device for borehole measurements e.g. with the SENSYS MAGNETO® BM2 DISTLOG system with distance measurement.
|Maximum ambient field||±75 µT|
|Specified measurement range||FGM650/10: ±10 µT|
|FGM650/3: ±8 µT|
|Sensor element spacing||650 mm|
|Point of reference||393mm*/4mm**|
|Noise||<40 pT rms /?Hz@1 Hz|
|Cut off frequency (bandwidth)||20Hz (DC...20Hz)|
|Temperature drift||<0.3 nT/K|
|Drift over time||t.b.d.|
|Sensitivity gradiometer||FGM650/10: 0.5 V/µT|
|FGM650/3: 0.6 V/µT|
|Sensitivity absolute||5.0V / 75 µT|
|Output||FGM650/10: ±5V full scale|
|FGM650/3: ±4,8V full scale|
|Power supply||±7,0 V to ±15,0 V|
|Current consumption||±26 mA|
|Dimensions||35 mm diameter x ca. 850 mm length (without connector)|
|IP code||IP68 down to 100m available|
|* measured from edge between head and tube||** from symmetry axis|