Implantable Activity and Temperature Logger

Overview of changes in animal activity over time. Minimally invasive, leadless and simple to implant.
Ideal for use in physiological and behavioral research on animals.

Key Features

Leadless, minimally invasive
Small, size 46mm x 15mm and 19g
Long battery life – typically 3 years
Stress-free long-term studies
Guaranteed accuracy and performance


Minimally Invasive
The DST centi-ACT simultaneously measures long term activity and core body temperature in the animal. The logger is simple to implant and is made from ceramic housing to guarantee biocompatibility.

For advice on implantation, please contact us.

The logger is ideal for a variety of studies including those looking at behavior, vaccinology and stress response, in the fields of laboratory animal research, wildlife research and animal welfare.

Overview of Changes in Animal Activity Over Time
Measuring acceleration derived activity gives researchers the chance to get an overall view of changes in the study animals’ activity over time. The DST activity data logger measures acceleration in three dimensions, in relation to earth‘s gravity field.

Stress-Free Long-Term Studies
The activity logger has a battery life of over 19 months, when using a sampling interval of 10 minutes. The logger is especially useful when a comprehensive data set throughout the research is needed with no disturbance to the animal.

Different Measurement Intervals
Optionally, the loggers can be programmed with up to multiple different intervals within a measurement sequence. This can, for example be useful when different intervals are preferred during the day or night and can save battery and memory at the same time.

Guaranteed accuracy and performance
Every logger is individually calibrated and comes with a calibration certificate. We guarantee the loggers’ accuracy and performance for one year after purchase.

SensorsActivity (3-axes acceleration), temperature
Size (Diameter x Length)15mm x 46mm
Housing MaterialAlumina (Ceramic)
Weight (in Air/in Water)19g/12g
Data Resolution12* bits for temperature, 13 bits for acceleration
Acceleration Resolution4 mg
Acceleration Accuracy+/-32 mg
Temperature Range5°C to +45°C (41°F to 113°F)**
Temperature Resolution0.032°C (0.058°F)
Temperature Accuracy+/-0.2°C (0.36°F)
Temperature Response TimeTime constant (63%) reached in 20 sec.
Memory TypeFLASH
Memory Capacity279,620 measurements per sensor (if all parameters are recorded simultaneously)
Memory Capacity Bytes2097152 bytes / temperature 1.5 bytes, acceleration 6 bytes
Memory MangementUser programmable sampling intervals for each sensor
Sampling IntervalUser specified in second(s) minute(s), or hour(s)
Minimum Measuring Interval1 second
Multiple Intervals OptionUp to 7 different intervals
Primary/Secondary OptionTemperature as primary, Activity as primary
Data Retention25 years
ClockReal time clock. Accuracy +/-1 min/month.
CommunicationsCommunication Box, wirelss transmission when DST sits in the box. Connection to PC: USB cable.
Attachment Hole0.9 mm (diameter)
Battery Life3 years***
Replaceable BatteryNo

*Adjusted resolution
**Outside ranges available upon request
*** For sampling interval of 1 minute; activity and temperature recorded simultaneously.
Warranty: 12 months

Simple in use, from setup to data retrieval
The logger and the accompanying accessories are designed for ease of use throughout the research process, from setting up the logger, implanting it, to retrieving and analysing the data. The logger is supported by the Mercury software and a Communication Box which need to be purchased with the first order.

Programming the logger
To start the logger for measurements it is placed into a Communication Box and connected to the software. The Communication Box serves as an interface between the logger and a PC computer. In the application software, the user sets the start time, start date and sampling interval before starting the recorder.

Multiple measurement intervals
Different measurement intervals can be set for the same study. This is especially useful when more or less frequent measurements are needed at a certain time period, saving data space and battery.

Memory and battery life calculations
The software automatically calculates when memory fills based on certain interval settings, making it easier for the user to decide how to program the logger. Estimated battery consumption during that time period is also calculated.

Uploading the Data
After recovering the logger, the logger is inserted into the communication box and the recorded data is uploaded to the software. The results are displayed both in graphic and tabular form and the data can be exported to other programs.

After retrieving the data the logger can easily be sterilized and reused as long as the battery lasts. Current battery life can be viewed in the software and the user can get an estimate of how long the logger memory and battery will last in a planned research.

Hermetically sealed
All Star-Oddi loggers are hermetically sealed and leak proof. Therefore the battery is not replaceable.