XIATECH T9000 Downhole Temperature and Pressure Logger
| Brand | XIATECH |
|---|---|
| Model | T9000 |
| Temperature Range | –10 to +80 °C |
| Temperature Accuracy | ±0.1 °C |
| Temperature Resolution | 0.01 °C |
| Pressure Range | 0–20 MPa |
| Pressure Accuracy | ±0.1 % FS |
| Pressure Resolution | 0.01 % FS |
| Data Storage Capacity | 100,000 samples |
| Sampling Interval | 1 s (configurable) |
| Power Supply | 7.4 V rechargeable Li-ion battery |
| Battery Life | 24 h |
| Dimensions | Ø48 mm × 335 mm |
| Weight | 2.35 kg |
| IP Rating | Equivalent to IP68 (20 MPa pressure resistance) |
| Interface | USB Type-A for data export and charging |
Overview
The XIATECH T9000 is a high-precision, ruggedized downhole temperature and pressure logger engineered for continuous in-situ monitoring in deep-well environments. It operates on the principle of dual-sensor measurement—integrating a calibrated Pt1000 platinum resistance thermometer (PRT) with a piezoresistive pressure transducer—to deliver synchronized, traceable readings of temperature and static pressure at depths ranging from several hundred to several thousand meters. Designed specifically for geoscience, petroleum engineering, and geothermal resource assessment applications, the T9000 meets the operational demands of high-pressure, high-temperature (HPHT) boreholes while maintaining metrological integrity across its full operating range. Its thermal response time is optimized via low-mass sensor packaging and direct thermal coupling to the wellbore fluid or formation, enabling stable, drift-free measurements under dynamic downhole conditions.
Key Features
- High-accuracy temperature sensing: ±0.1 °C accuracy over –10 to +80 °C, verified against NIST-traceable reference standards using end-to-end system calibration (sensor + electronics + firmware).
- Dual-parameter acquisition: Simultaneous logging of temperature and absolute pressure with independent signal conditioning paths to minimize cross-talk and ensure measurement fidelity.
- Robust mechanical architecture: Hermetically sealed stainless-steel housing rated for continuous operation at 20 MPa (≈2,900 psi), compliant with API RP 14B and ISO 13628-6 environmental stress requirements for subsea and downhole instrumentation.
- Onboard non-volatile memory: Stores up to 100,000 timestamped records (temperature, pressure, elapsed time) with automatic overwrite logic; data retention guaranteed for ≥10 years at ambient storage conditions.
- Configurable sampling protocol: Adjustable acquisition interval from 1 second to 24 hours via host software; supports burst-mode logging for transient event capture.
- USB-powered interface: Enables both data retrieval and battery recharging without requiring proprietary docking hardware; compatible with Windows-based field laptops and lab workstations.
Sample Compatibility & Compliance
The T9000 is designed for deployment in liquid-filled boreholes (drilling mud, brine, geothermal fluid) and dry gas wells where ambient pressure exceeds hydrostatic thresholds. Its pressure port geometry and diaphragm material (316L stainless steel with ceramic isolation layer) resist corrosion from H₂S, CO₂, and chloride-rich media per NACE MR0175/ISO 15156. Temperature calibration conforms to IEC 60751 Class A tolerances, and pressure transduction adheres to EN 61326-1 for electromagnetic compatibility in industrial settings. While not certified for SIL-rated safety functions, the device supports GLP-compliant data workflows through audit-trail-enabled software operations and immutable binary data export (CSV and binary .DAT formats).
Software & Data Management
The included PC-based configuration and analysis suite provides full control over instrument setup, real-time telemetry preview, and post-mission data processing. Users may adjust clock synchronization, define custom pressure-to-depth conversion using user-input fluid density (e.g., 1.0–1.3 g/cm³), apply linear or polynomial thermal drift compensation, and generate annotated depth-temperature-pressure profiles. All software actions—including parameter changes, data clears, and firmware updates—are logged with timestamps and operator IDs, satisfying basic FDA 21 CFR Part 11 record-keeping expectations for non-clinical research environments. Exported datasets include embedded metadata (serial number, calibration date, sensor ID) to support ISO/IEC 17025 traceability requirements.
Applications
- Geothermal gradient mapping and reservoir thermal characterization
- Wellbore stability analysis during drilling and completion operations
- Long-term monitoring of abandoned well integrity and leakage pathways
- Calibration reference for distributed temperature sensing (DTS) fiber-optic systems
- Field validation of numerical heat-flow and fluid-flow simulation models
- Environmental baseline studies in deep aquifer monitoring programs
FAQ
What is the maximum operational depth supported by the T9000?
Depth capability depends on local fluid density and geothermal gradient; at 20 MPa rating and assuming average formation fluid density (~1.15 g/cm³), the T9000 is suitable for depths up to approximately 1,800 m in vertical wells.
Can the T9000 be deployed in high-H₂S environments?
Yes—the pressure sensor diaphragm and housing materials are qualified per NACE MR0175 for sour service up to 100 °C and partial pressures ≤100 kPa H₂S.
Is firmware upgrade supported in the field?
Firmware updates are performed via USB connection using the official XIATECH utility; version history and checksum verification are provided in each release package.
Does the device support external trigger inputs or analog outputs?
No—the T9000 is a self-contained data logger with no external I/O ports beyond USB; it does not provide real-time analog voltage or current outputs.
How is calibration traceability documented?
Each unit ships with a factory calibration certificate listing individual sensor coefficients, uncertainty budgets (k=2), and reference standard IDs traceable to CNAS-accredited laboratories.
