BVM-01 Borehole Vector Magnetometer

The BVM-01 contains a high sensitivity three component fluxgate magnetometer and two-axis tiltmeter to provide measurements used in vector magnetic and borehole orientation surveys. The sensors are mounted in a non-magnetic housing, which is pressure rated to 1500 or 3000 meters. All functions within the probe are controlled by an on-board microprocessor, that samples each sensor twice every second, and transmits the digital data record up-hole along the four conductors logging cable to the BIN-04 digital data interface. Power and a return ground provided to the probe through 2 of the cable conductors.

Each component of the magnetic field is sampled over 0.5 seconds to a sensitivity of 0.1nT.

Its 40-mm outer diameter permits use of the BVM-01 in small hole drilling programs typical in the mining industry. A complete copy of all measurements is recorded that permits further analysis in area of high magnetic gradient, which are often associated with mineralization.


Magnetometer Range: +/-100,000nT
Sensitivity 0.1nT
Measuring time [0.5 sec.]
HOUSING High strength filawound tube.
MAXIMUM DEPTH 1500 meters for 40mm housing.
3000 meters for 42mm housing
CONNECTION 4 pin connector (Gearhardt Owen )
TEMPERATURE RANGE Storage: -35oC to 70oC
Operating: 0oC to 70oC
Extended: 0oC to 125oC
OUTPUT 10mA current loop, 4800 baud
SUPPLY VOLTAGE 24 VDC @ 5W (at probe header)
DIMENSIONS 40 mm diameter x 1.4 meters long
WEIGHT  2.8 kg