Pressure Temperature Differential Temperature Logging
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Basic Information
| Model | Diameter (mm) | Length (mm) | Weight (kg) | Pressure Resistance (MPa) | Operating Temp. (°C) |
| SA2712 | φ50 | 1557 | 16 | 40 | 0~100 |
Description
This tool measures fluid pressure and temperature inside the borehole. It integrates dual temperature detectors and dual pressure detectors, spaced 1 meter apart. The differential output provides pressure difference and temperature difference signals.
The temperature sensor uses a high-precision PT100 thermistor powered by a precision constant current circuit. Its voltage drop reflects the borehole temperature, which is then amplified, converted via A/D, encoded, and transmitted to the surface acquisition recorder. The pressure sensor adopts an imported titanium/silicon-sapphire sensor, offering high sensitivity and low drift.
Currently, it is mainly applied in hydrological, geothermal, engineering, and related logging fields.
Specification
| Parameter Name | Temperature | Differential Temp. | Pressure | Differential Press. |
| Measurement Range | 0~100 ℃ | 4 ℃ | 0~40 MPa | 0.04 MPa |
| Measurement Error | ±0.5 ℃ | — | 0.1‰ | — |
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