Fluid Resistivity & Temperature Probe HRT-381
The probe is designed for measurement of electric conductivity of rocks in boreholes. High stability and exceptionally wide dynamic range are giving you a possibility to carry out 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 of the probe is practically instantaneous (<0.5s).
Probe Parameters
| Diameter |
38 mm |
| Lengt |
100 cm |
| Weigh |
3.0 kg |
| Max. Working Temperature/Pressure |
75°C/15 MPa |
| Min. No. of Cable Conductors |
2 |
| Supply Voltage Range |
30 – 45 VDC |
| Max./Nominal Current Consumption |
100/50 mADC |
| Supply Voltage Polarity |
+ on central cond. |
| |
− on probe casing |
Resistivity Meter Parameters
| Resistivity Range |
0 – 200 Ωm |
| Precision |
±3% |
| Exciting Current (square Wave) Frequency |
300 Hz |
| Communication (positive pulse) |
0 – 20 000 cps |
Thermometer Parameters
| Temperature range |
0 – 70°C |
| Precision |
±0,2°C |
| Sensitivity |
0,003°C |
| Time Constant |
1 sec |
| Communication (negative pulse) |
0 – 40 000 cps |
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.
