Induction Conductivity Probes HI-453, HI-453E
The probes HI-453 are 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 probes can be used in water filled, dry and plastic cased boreholes. The response is practically instantaneous (<0.5s).
Probe Parameters
| Diameter | 45 mm |
| Length | 160 cm |
| Weigh | 7.0 kg |
| Max. Working Temperature/Pressure | 75°C/20 MPa |
| Min. No. of Cable Conductors | 2 |
| Supply Voltage Range | 30 – 45 VDC |
| Max./Nominal Current Consumption | 150/80 mADC |
| Supply Voltage Polarity | + on central cond. |
| − on probe casing |
Measuring Parameters
| Sensor | two coil system |
| Intercoil Spacing | 50 cm |
| 30 cm (HI-453E) | |
| Operating Frequency | ≈100 kHz |
| ≈2 kHz (HI-453E) | |
| Communication (negative pulse) | 0 – 20 000 cps |
| Conductivity range | 1 mS/m – 3 S/m |
| 0.3 S/m – 1 000 S/m (HI-453E) | |
| Accuracy | < 3% F.S. |
| Stability | < 0.5 mS/m/10°C |
| < 0.2 S/m/10°C (HI-453E) |
Special orders
Probes of diameters 32 and 38 mm can also be manufactured upon special order. Their measuring parameters are similar to those stated above.