BRS-02 Borehole Multiple Array Resistivity Probe
The BRS-02 resistivity probe is contained in a 42-mm diameter non- magnetic and non- conductive housing, that is pressure rated to 3,000 meters of water depth.The probe is controlled by an on- board microprocessor that samples the electrical potential between the two electrode arrays at a rate of 2 samples per second.
The potential range of the measurement is +/-50V and has a resolution of 0.1mV. The digital data is then transmitted along a 4 conductor logging cable to the surface, to the data interface (BIN-04). The BRS-02 resistivity probe has the constant current generator build into the probe.
This probe has a true normal array configuration. The potentials are measured between the 16 and 48inch potential electrodes and the infinite electrode on the surface. The self-potential voltage in the borehole can be measured with the current generator "OFF".
PROBE SPECIFICATION | |
Sensor Range | 0 to 50,000 ohm-m |
Sensitivity | 1 ohm-m |
Input Current | 2,5,10,20 mA (selectable) |
Options | Temperature Sensor 0 to 50C range 0.001C sensitivity |
Housing | High strength filawound tube |
Maximum Depth | 3000 meters |
Connection | 4-pin (Gearhardt Owen) |
Temperature Range |
Storage; -35 to +70°C Operating: 0 to +70°C Extended: 0 to +120°C |
Sampling Rate | 2 Hz |
Output | 20mA current loop, 4800 baud |
Supply Voltage | 48 VDC @ 5W (at probe header) |
Dimensions | 40mm diameter x 2.0 meters long |
Weight | 3.6 kg |