The Acoustic Data Logger is a robust, long-duration well monitoring system engineered to record, store, and acoustically transmit wellbore pressure and temperature data from depths up to 3,000 meters. Designed for both short-term appraisal campaigns and multi-year deployments, it delivers consistent performance in challenging offshore environments. Built with super duplex stainless steel for extended corrosion resistance, the system integrates seamlessly with both IWIS and non-IWIS downhole gauges, enabling accurate and continuous data capture without the need for intervention.
Utilizing Sonardyne’s 6G and Wideband 2 acoustic technology, the Acoustic Data Logger allows large volumes of logged data to be transmitted to surface platforms, vessels, or uncrewed systems at rates between 300 and 9,000 bps. Configurable logging intervals from two minutes to five days provide flexibility across diverse well monitoring applications. ROV-deployable and portable, the system can be redeployed between wells as needed, offering up to three years of autonomous operation. With 512 GB internal storage, low power consumption, and compatibility with external battery packs, the Acoustic Data Logger delivers dependable subsea data collection for well integrity, reservoir management, and long-term production monitoring.
Specifications:
| Type 8195 | |
| Acoustic Communication | |
| Operating Frequency | LMF (14–19 kHz) |
| Transducer Beam Shape |
±30° (directional) ±70° (omni with noise shield) |
| Transmit Source Level (dB re 1 µPa @ 1 m) | >190 dB |
| Receiver Threshold (dB re 1 µPa) | 85–120 dB (7 levels) |
| Acoustic Data Link | High speed, spread spectrum |
| Transmission Rates | 300–9,000 baud (true payload rate variable by telemetry scheme) |
| Battery Capacity – Single Battery Pack | 120 Ah @ 14.5 V dc |
| Battery Capacity – Dual Battery Pack | 240 Ah @ 14.5 V dc |
| Battery Life | Dependant on interface and logging configuration |
| Interface Card – Supply Voltage | 24 V dc ± 4 V |
| Interface Card – Maximum Power | 30 W |
| Communication and Interface | |
| Gauge Interface Card Type | 1x IWIS DHPT Interface Card (dependant on field requirements) |
| Interface Card Serial Communication Format | IWIS RS485 at 9,600 baud, Modbus TCP or Modbus RTU protocol |
| Interfaces – Serial | 2x RS485/422, 2x RS232 |
| Interfaces – Analogue | 6x Analogue |
| Serial Communication | Direct serial access to data logger and Gauge Interface Card via external serial port |
| Logging and Data Storage | |
| Minimum Memory Capacity | 512 Mb – Industrial SD Card (non-volatile) |
| Sample Rates – Standard | Configurable from 2 minutes to 5 days (dependant on interface) |
| Sample Rates – Special | High sample rate operation for user defined durations from 1 minute to 4 days with configurable rates from 5–60 seconds (dependant on interface) |
| Dimensions (Length x Diameter) |
MF single battery configuration 1,086 x 199 mm LMF dual battery configuration 1,348 x 199 mm |
| External Connectors – Gauge Interface | 1 x ODI or TRONIC (dependant on field requirements) |
| External Connectors – Serial Test Port |
1x Subconn MCBH8M 1x Subconn MCBH8F |
| Depth Rating | 3,000 m (dependant on connector) |
| Operating Temperature | -10 to +55°C |
| Storage Temperature | -25 to +70°C |
| Design Qualification | ISO 13628-6 Level Q1 and Q2 |
| Options | |
| ROV Handle Type 8195-007 | ROV handle assembly (folding), super duplex stainless steel – UNS32550 |
| Battery Configuration | Single (120 Ah), dual (240 Ah) or triple (360 Ah) |
