Ultra-miniature Geolocator (with Accelerometer and Magnetometer Sensors)｜LoggLaw C7XI (Non-rechargeable model) / C7XIR (Rechargeable model)

Light, Pressure, Temperature, Acceleration, Geomagnetism data Logger

Overview of LoggLaw C7XI（Non-rechargeable model）

The LoggLaw C7XI is an advanced model that builds upon our previous depth-, internal temperature-, external temperature-, and light-sensor loggers (C7 and C8), now featuring additional acceleration and geomagnetic sensors.

In the past, loggers equipped with acceleration and geomagnetic sensors could record data for only a few weeks at most—insufficient for studying the long-term behavior of migratory fish.

The LoggLaw C7XI retains the core strengths of the C7/C8 series, including a high-precision internal clock (±95 seconds per year @ 25 °C) for accurate geolocation. On top of that, it introduces acceleration and geomagnetic sensors capable of long-term, year-scale measurements.

LoggLaw C7XIR（Rechargeable model）

The rechargeable model, LoggLaw C7XIR, offers approximately one-quarter the continuous recording duration of the C7XI, but can be reused repeatedly. Unlike the C7XI, the C7XIR does not come in a stalk-type configuration.

What we can understand with acceleration and geomagnetism :

– Amount of activity (energy consumption)
– Caudal fin frequency (growth)
– Geolocation where illumination does not reach
– Orientation change (navigation)
– Detailed understanding of behavior (feeding, spawning behavior, etc.)

attachment to abdominal cavity of bonito

Logger with stalk

Typical Recording Duration
-18months: Duty Cycle 5 sec (Accelerometer 16Hz, Magnetometer 1Hz), Off Duty 55 sec.
Depth, Internal and external Temp, Light at 60 second interval