Quadruple Induction Conductivity Probe H4I-453
The probe H4I-453 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 or plastic cased boreholes.
The 30 cm channel is used to minimize the impact of the disturbed zone of the borehole wall on the measurement results.
The response is practically instantaneous (<0.5s).
Probe Parameters
| Diameter | 45 mm |
| Length | 180 cm |
| Weight | 7.5 kg |
| Max. Working Temperature/Pressure | 70°C/15 MPa |
| Min. No. of Cable Conductors | 2 |
| Supply Voltage Range | 30 – 45 VDC |
| Max./Nominal Current Consumption | 150/100 mADC |
| Supply Voltage Polarity | + on central cond. |
| − on probe casing |
Measuring Parameters
| Sensor | five coil system |
| Intercoil Spacing | 30, 50, 80 and 120 cm |
| Operating Frequency | ≈100 kHz |
| Communication (negative pulse) | 0 – 20 000 cps |
| Conductivity range | 1 mS/m – 3 000 mS/m |
| Accuracy | < 3% F.S. |
| Stability of Zero | < 0.5 mS/m/10°C |
Special orders
If customer's system allows it all the four channels can be measured simultaneously. If not, two channels are measured when the probe goes down and the other two ones when the probe moves up.