Implantable Heart Rate, Activity and Temperature Logger Overview of changes in animal activity and heart rate over time. Minimally invasive, leadless and simple to implant. Ideal for use in physiological and behavioral research on large animals.Leadless, Minimally Invasive: The DST centi-HRT ACT logger simultaneously measures long term heart rate, activity, and body temperature in the animal. The device has no external wires, making it especially simple to implant. It is hermetically sealed for biocompatibility.Application: Ideal for studies monitoring behaviour and stress response in laboratory animal research, wildlife studies, animal welfare, and fish physiology.Correlation Between Heart Rate and Activity: Enables researchers to identify correlation between heart rate and activity, useful in stress response studies. Available with two or three sensors: activity and temperature or activity, heart rate, and temperature.Leadless ECG Derived Heart Rate: Heart rate is derived from a leadless single channel ECG. Electrodes are part of the housing, making implantation easy. The logger takes burst ECG measurements at set intervals and calculates mean heart rate for each recording. Each burst is graded with a QI (quality index) accessible in the application software.Overview of Changes in Animal Activity Over Time: Measures acceleration-derived activity, allowing monitoring of changes in animal activity over time. Measures acceleration in three dimensions relative to earth's gravity field.Stress-Free Long-Term Studies: Battery life over 19 months with a 10-minute sampling interval. Enables comprehensive data collection with no disturbance to the animal.Single or Multiple Intervals: Supports sampling at a single interval or multiple intervals, useful for frequent measurements at certain periods.Guaranteed Accuracy and Performance: Each logger is individually calibrated and comes with a calibration certificate. Accuracy and performance are guaranteed for one year after purchase. Using the loggerDesigned for ease of use from setup to data retrieval. Supported by Mercury software and a Communication Box (purchased with first order).Programming: Logger is placed in the Communication Box and connected to the software to set start time, date, and sampling interval.Multiple measurement intervals can be set for the same study, optimizing data space and battery life.Software calculates memory fill and battery consumption based on interval settings.Data upload: After recovery, logger is inserted into the Communication Box and data is uploaded to the software, displayed in graphic and tabular form, and exportable.Reusable: Logger can be sterilized and reused as long as the battery lasts. Battery is not replaceable. Key featuresLeadless, minimally invasiveSmall size: 46mm x 15mm, 19gCorrelation between heart rate and activityStress-free long-term studiesGuaranteed accuracy and performance SpecificationsSensors: Heart rate, Activity (3-axes acceleration), TemperatureSize: 15mm x 46mmHousing Material: Alumina (Ceramic)Weight: 19g (in air) / 12g (in water)Data Resolution: 12 bit (Temperature), 13 bit (Acceleration)Acceleration Resolution: 2mgTemperature Range: 5°C to +45°C (41°F to 113°F)Temperature Resolution: 0.032°C (0.058°F)Temperature Accuracy: +/-0.2°C (0.36°F)Memory Type: FLASHMemory Capacity: 99,863 measurements per sensor (if all parameters are recorded simultaneously)Memory Capacity Bytes: 2,097,152 bytes / HR+T 3 bytes, acceleration statistics 18 bytesMeasurement Interval: User specified in minutes or hoursMinimum Measurement Interval: 2 minutes (T+HR+ACT, T+HR, T+ACT)Multiple Intervals Option: Up to 7 different intervalsMeasurement Options: T+HR OR T+ACT OR T+HR+ACTHeart Rate (HR): ECG Sampling Frequency: 80-800HzData Retention: 25 yearsClock: Real time clock. Accuracy +/-1 min/month.Communications: Communication Box, wireless transmission when DST is placed in the box. Connection to PC: USB cableAttachment Hole: 0.9 mm (diameter)Battery Life: 2-17 months (for sampling interval of 2-20 minutes; ECG sampled at 600Hz, Activity 1Hz over 1 minute)Replaceable Battery: NoDuration of HR Measurement: 600 or 1500 ECG samplesAccelerometer Sampling Frequency: 0.03Hz-10HzDuration of ACT Measurement: 1 minute AccessoriesCommunication Box: Interface between logger and PC, used for starting logger and retrieving data. Comes with USB cable.Mercury Software: Graphical Windows software for laboratory and wildlife sectors. Supports measurement setup, graphical/tabular data view, and data export. ImplantationMinimally invasive due to leadless design and small size.Recommended to implant subcutaneously close to the heart for best ECG signal.Suitable for large animals such as cattle, sheep, pigs, and bears.Can be sterilized and reused as long as battery lasts. Not all sterilization methods are suitable (avoid temperatures above 60°C). DocumentationComparison document: DST centi-HRT ACT - G2 vs G1 (see PDF in documentation section). Characteristics / Technical Specifications Product: Animal Heart Rate Activity Data Logger Model: DST centi-HRT ACT Brand: Star-Oddi Sensors: Heart rate, Activity (3-axes acceleration), Temperature Size: 15mm x 46mm Weight: 19g (air) / 12g (water) Housing: Alumina (Ceramic) Battery: Non-replaceable, 2-17 months Memory: 99,863 measurements per sensor Temperature Range: 5°C to +45°C Data Retention: 25 years Communication: Communication Box, USB Warranty: 12 months