Induction Conductivity Probe HI-381
The probe HI-381 is designed for measurement of electrical conductivity of rocks in boreholes. High stability and exceptionally wide dynamic range are giving you possibility to carry on precise measurements of conductivity of sand-clay layers and also mineralized water-soaked sands. Thanks to the induction method applied the probe can be used in water filled, dry and plastic cased boreholes. The response is practically instantaneous (<0.5s).
Probe Parameters
| Diameter |
38 mm |
| Length |
160 cm |
| Weigh |
5.0 kg |
| Max. Working Temperature/Pressure |
70°C/10 MPa |
| Min. No. of Cable Conductors |
2 |
| Supply Voltage Range |
30 – 45 VDC |
| Max./Nominal Current Consumption |
100/80 mADC |
| Supply Voltage Polarity |
+ on central cond. |
| |
− on probe casing |
Measuring Parameters
| Sensor |
two coil system |
| Intercoil Spacing |
50 cm |
| Operating Frequency |
≈26 kHz |
| Communication (negative pulse) |
0 – 20 000 cps |
| Conductivity range |
1 mS/m – 3 000 mS/m |
| Noise Level |
< 0.5 mS/m |
| Accuracy |
< 100 mS/m .. 5% F.S. |
| |
100 - 1 000 mS/m .. 3% F.S. |
| |
1 000 - 3 000 mS/m .. 10% F.S. |
