C7-250 vs C7XI
The C7-250 is optimized for long-term shallow-water logging, while the C7XI carries 3-axis accelerometer and geomagnetic sensors for detailed behavioral analysis. Choose the model that best fits your research objectives, target species, and deployment scenario.
Records depth, temperature, and light for up to 24 months. Lightweight, compact housing suitable for small animals.
3-axis accel. / geomagnetic sensors and 512 MB memory enable detailed analysis of activity, feeding, and other behaviors.
Detailed Specifications
Side-by-side comparison
★ marks indicate areas where each model particularly excels.
Basic Specifications
| LoggLaw C7-250 | LoggLaw C7XI-9D44 | |
|---|---|---|
| Weight in Air | 4.8 g | 7.0 g |
| Dimensions | φ9 × 32 mm | 9 × 44 mm |
| Depth Rating | 1,000 m | 1,000 m |
| Memory | 8 MB | 512 MB |
| Time Accuracy | ±95 s/yr | ±95 s/yr |
Sensors
| LoggLaw C7-250 | LoggLaw C7XI-9D44 | |
|---|---|---|
| Depth (pressure) | ✓ | ✓ |
| Internal / External Temperature | ✓ | ✓ |
| Light | ✓ | ✓ |
| Salinity | — | ✓ |
| 3-axis Accelerometer | — | ✓ (up to 64 Hz / ±8 g) |
| 3-axis Geomagnetic Sensor | — | ✓ (up to 16 Hz / ±1200 μT) |
| Stalk (Ext. Temp / Light sensor) | Optional | Optional (not supported on C7XIR) |
Measurement Performance
| LoggLaw C7-250 | LoggLaw C7XI-9D44 | |
|---|---|---|
| Measurable Depth | ~600 m | ~600 m |
| Depth Resolution | ≤1 cm | ≤1 cm |
| Interval Settings | 1 / 5 / 15 / 30 / 60 / 120 / 300 / 600 s | Duty Cycle / Continuous (up to 64 Hz) |
| Continuous Burst Sampling | — | 5 s × 4–64 Hz × 3 axes |
Deployment
| LoggLaw C7-250 | LoggLaw C7XI-9D44 | |
|---|---|---|
| Battery Life | 24 months [*1] | 18 months [*2] / Continuous: 2 months [*3] |
| Rechargeable Model | — | C7XIR variant |
| Primary Use Cases | Long-term geolocation, dive-depth logging | Behavioral analysis (activity / tail beats / feeding / spawning) |
Each model's standout strengths
[*1] Pressure, internal temperature, external temperature, light intensity (60-sec interval)
[*2] Accelerometer (16 Hz) and geomagnetic (1 Hz) measured for 5 seconds at 60-sec intervals, plus pressure, int. temp., ext. temp., light at 60-sec interval
[*3] Depth and geomagnetic at 1 Hz, accelerometer at 16 Hz interval setting
C7XI's Duty-Cycle Operation
The C7XI records six sensor channels simultaneously in Duty Cycle mode. The standard configuration (5 s ON window with accelerometer at 16 Hz, depth at 1 Hz, and geomagnetic at 1 Hz; temperature and light sampled every 60 s) achieves up to 18 months of measurement. Duty cycle period, per-sensor frequencies (accelerometer up to 64 Hz), and sensor combinations are selectable to match your use case — battery life varies with the chosen settings.
View the detailed sampling patternWhich One to Choose?
Selection Guide
When LoggLaw C7-250 fits best
- Long deployment cycle of up to 24 months from attachment to recovery
- Recording the basic trio of depth, temperature, and light — no behavioral analysis required
- Target animals are small to medium in size, where the lighter (4.8 g) and smaller (φ9 × 32 mm) housing is preferred
- Migration / movement studies where geolocation from light data is the primary objective
- Projects where simple interval sampling (1–600 s) is sufficient
When LoggLaw C7XI fits best
- Need detailed analysis of activity levels, tail-beat frequency, or dive patterns
- Need to detect short-duration events such as feeding, spawning, or reproduction from behavioral data
- Need 16–64 Hz high-frequency sampling from the accelerometer
- Need heading / swim-vector analysis by combining the geomagnetic sensor
- Considering a continuous recording mode that takes advantage of the 512 MB memory
- Want a rechargeable C7XIR for repeated deployments
Shared Strengths
Both models share
Both models share a 1,000 m depth rating with a ~600 m depth-sensor range — sufficient performance for shallow- to mid-depth marine research.
The high-resolution spec common to the entire C-Series. Captures fine-grained dive patterns and surface-time durations with precision.
Temperature-compensated high-precision clock keeps drift small over long deployments, preserving geolocation accuracy.
Inquire About LoggLaw C Series
For detailed product information, pricing, case studies, and more, feel free to contact us. Our expert staff will propose the best solution for your needs.