Specifications
Last updated on October 6, 2025
The Cryologger Ice Tracking Beacon (ITB) is an ultra-low-power, satellite telemetry-enabled GNSS tracking system designed for long-term autonomous deployments in polar environments. Its lightweight design, efficient electronics, and flexible power system make it well suited for use on drifting sea ice, icebergs, and remote platforms.
Cryologger ITB enclosure opened showing internal components.
Sealed Cryologger ITB case ready for deployment.
Electrical Specifications
Input Voltage
- Minimum input voltage: 5.2 V
- Recommended minimum: 7.0 V
- Maximum input voltage: 50 V
Avoid operating the system below 7.0 V when using the main power terminals. Voltage dropouts and cold temperatures can affect stability and performance.
⚡ Power Consumption
| Mode | Subsystems Active | Average Power Draw |
|---|---|---|
| Logging | GNSS + MCU | ~0.25 W |
| Transmitting | Iridium + MCU | ~1.5–3.25 W (peak) |
| Sleeping | RTC only | ~1.25 µW |
Power consumption can vary depending on sky visibility during GNSS positioning and Iridium transmission. In most cases, SBD messages are transmitted in under 5 seconds.
🔋 Battery
| Battery Pack | Capacity | Nominal Voltage |
|---|---|---|
| LiSOCl₂ | 38 Ah | 7.2 V |
Lithium thionyl chloride (LiSOCl₂) batteries offer reliable performance in extreme cold (down to -55 °C) and support the high-current demands of Iridium transmission.
LiSOCl₂ packs may be subject to shipping and transport restrictions. Please contact us for guidance on compliance and safe handling.
📏 Dimensions
| Component | Dimensions |
|---|---|
| PCB Assembly | 133 × 63 × 20 mm |
| 3D-printed Enclosure | 140 x 70 x 30 mm |
| External Enclosure | 259 × 201 × 114 mm |
The Cryologger ITB electronics can be adapted to various enclosure sizes depending on deployment needs.
⚖️ Weight
| Component | Weight |
|---|---|
| Assembled ITB | ~400 g |
| Inside Enclosure | ~1.5 kg |
💡 Notes
- The system is capable of operating continuously for over 4 years, depending on factors such as transmission frequency, environmental temperature, and battery capacity.
- Lower message frequencies and warmer ambient conditions generally contribute to extended deployment durations.
For full hardware schematics, software, and 3D-printed enclosure files, visit the Cryologger ITB GitHub repository.