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.