High-Accuracy Directional Sensor Based on Proprietary Fluxgate Magnetometer and Liquid Capacitive Tilt Sensors
The MELDOR Directional Sensor is a complete directional measurement solution designed for integration into MWD, LWD, wireline, and other borehole surveying systems.
Unlike conventional directional sensors that rely on MEMS accelerometers, the MELDOR sensor combines a proprietary 3-axis digital fluxgate magnetometer with liquid capacitive tilt sensors developed entirely in-house. This architecture enables direct inclination measurement while maintaining excellent stability under vibration, shock, and high-temperature drilling conditions.
Every key sensing element—including the magnetometer, tilt sensors, signal processing electronics, and calibration algorithms—is developed and manufactured by MELDOR, ensuring complete control over measurement quality and long-term reliability.
Why Choose MELDOR Directional Sensor?
Direct Inclination Measurement
Most directional sensors estimate inclination from MEMS accelerometers by measuring gravitational acceleration. During drilling, however, accelerometers are affected by vibration, impacts, stick-slip, rotation, and other dynamic forces that introduce significant measurement errors.
The MELDOR Directional Sensor uses proprietary liquid capacitive tilt sensors that measure inclination directly rather than estimating it from acceleration. The liquid sensing element naturally suppresses high-frequency mechanical disturbances, providing significantly higher measurement stability in real drilling environments.
Fully Digital 3-Axis Fluxgate Magnetometer
The directional sensor incorporates a fully digital three-axis fluxgate magnetometer designed and manufactured by MELDOR.
Main advantages include:
- Fully digital signal processing
- Excellent orthogonality between sensing axes
- Stable performance over a wide temperature range
- Low noise
- High repeatability
- Proprietary calibration technology
- Long-term measurement stability
Because the complete magnetometer is developed in-house, every stage—from magnetic core production to calibration—is optimized for directional surveying applications.
Proprietary Liquid Capacitive Tilt Sensors
The inclination measurement system is based on MELDOR liquid capacitive sensors rather than MEMS accelerometers.
Benefits include:
- Direct angle measurement
- High immunity to drilling vibration
- Excellent long-term stability
- No temperature hysteresis
- High measurement repeatability
- Stable performance under severe drilling conditions
This sensing technology has been specifically developed for precision directional measurements in borehole applications.
Designed for Harsh Drilling Environments
The MELDOR Directional Sensor has been engineered for reliable operation under demanding downhole conditions.
Its robust mechanical construction provides excellent resistance to:
- Continuous vibration
- Mechanical shock
- Rotary drilling loads
- High-temperature operation
- Long-term field use
The compact design allows straightforward integration into existing directional tools while maintaining high measurement accuracy.
Complete In-House Development
Unlike many manufacturers who integrate commercially available sensors, MELDOR develops every critical measurement component internally.
This includes:
- Fluxgate magnetometers
- Liquid capacitive tilt sensors
- Digital electronics
- Signal processing algorithms
- Calibration systems
- Mechanical design
This approach allows continuous optimization of the complete measurement system instead of individual components.
Applications
The MELDOR Directional Sensor is suitable for a wide range of directional surveying applications, including:
- Measurement While Drilling (MWD)
- Logging While Drilling (LWD)
- Wireline surveying tools
- Directional drilling systems
- Rotary steerable systems
- Borehole navigation instruments
- High-temperature directional tools
- OEM directional measurement systems
Key Advantages
| Feature | Benefit |
|---|---|
| Proprietary 3-axis fluxgate magnetometer | Stable and accurate magnetic measurements |
| Liquid capacitive tilt sensors | Direct inclination measurement |
| No MEMS accelerometers | Improved performance under vibration |
| Fully digital signal processing | High repeatability and stability |
| Complete in-house development | Full quality control |
| Compact design | Easy OEM integration |
| Robust construction | Reliable operation in harsh environments |
| Custom configurations | Adaptation to customer requirements |
OEM Integration
The MELDOR Directional Sensor can be supplied as an OEM module for integration into customer-designed directional systems.
Configuration options include:
- Custom mechanical dimensions
- Various communication interfaces
- Customer-specific electronics
- Adaptation to project requirements
- Calibration according to application specifications
Why MELDOR?
For more than 15 years, MELDOR has specialized in the development of precision directional measurement technologies for the oil and gas industry.
Our engineering philosophy is based on designing measurement systems rather than assembling commercially available components. This enables us to achieve high stability, excellent repeatability, and reliable operation under the challenging conditions encountered in modern drilling applications.
Frequently Asked Questions
Why does the MELDOR Directional Sensor not use MEMS accelerometers?
Liquid capacitive tilt sensors provide direct inclination measurement and significantly reduce the influence of drilling vibrations and dynamic acceleration.
Is the fluxgate magnetometer developed by MELDOR?
Yes. The complete three-axis digital fluxgate magnetometer is designed, manufactured, and calibrated entirely by MELDOR.
Can the sensor be integrated into existing MWD systems?
Yes. The directional sensor is designed for OEM integration and can be adapted to customer-specific mechanical and electronic requirements.
Is customization available?
Yes. Mechanical dimensions, interfaces, electronics, and calibration parameters can be customized for individual projects.
