Logger for heart rate & temperature measurements, implantable, micro

Code DST micro-HRT
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Key features

  • Small, leadless logger (8,3 mm x 25,4 mm)
  • Data stored in memory
  • Automatic measurements
  • Simple and cost effective
  • Group and unconfined housing


The heart rate sensor DST micro-HRT simultaneously measures long term heart rate and core temperature in animals. This makes it ideal for studies in which baseline and immunology responses are recorded, it's also suitable for toxicological, metabolic and thermoregulation studies. The heart rate is derived from a leadless single channel ECG in which the electrodes are part of the housing material, making the logger especially easy to implant. The logger then takes a burst measurement on any set time interval and calculates the mean heart rate for each recording. Each burst recording of heart rate consists of 600 measurements. For validation purposes, each individual burst is graded with a certain quality index (QI) accessible in the accompanying application software.

The heart rate sensor can store up to 21844 paired heart-temperature measurements and has a battery life of circa 3.5 months (with sampling interval of 10 min). The DST micro-HRT logger is easy to sterilize (gas sterilizer or 70% ethanol) and can be reused as long as the batteries last. Each DST micro-HRT has its own five digit serial number permanently marked on the logger housing as well as placed in the logger's memory and provided with all downloaded data. DST micro-HRT is especially useful when you wish to record a comprehensive data set throughout your research with no disturbance to the animal. Each logger comes with a calibration certificate.

The DST micro-HRT is supported by the Mercury software and the Communication Box which serves as an interface between the logger and a PC computer. Communication between the logger and the Communication Box is wireless when logger is placed in the Communication Box.

In the software, the user programs the start time, start date and sampling interval before the logger is implanted. A single interval is defined in minutes or hours, fastest interval is 1 minute. Optionally it's possible to program with multiple intervals; up to seven different intervals can be used within the same measurement sequence. The user would then define the number of measurements to be recorded within each interval and thereby have more/less frequent measurements during specific time periods.

After recovering the DST, recorded data is uploaded in the software where the results are displayed both in graphic and tabular form. The software also provides the user with some basic statistic information on the data such as minimum and maximum values on defined area, median, average, distribution of values etc. When recorded data has been retrieved, the DST can be re-programmed and reused as long as the batteries last.

A set of Communication Box and Mercury software needs to be purchased with the first order.

  • Sensors: temperature and heart rate
  • Size (diameter x length): 8.3 mm x 25.4 mm
  • Housing material: alumina (ceramic) and biocompatible epoxy
  • Weight: 3.3g
  • Data resolution: 12 bits
  • Temperature range: 5°c to +45°c (41°f to 113°f)
  • Extended calibration option: calibration below 5°c available upon request
  • Temperature resolution: 0.032°c (0.058°f)
  • Temperature accuracy: +/- 0.2°c (0.36°f)
  • Memory type: non-volatile eeprom
  • Memory capacity: 43690 measurements per sensor
  • Sampling interval: user specified in second(s), minute(s), or hour(s)
  • Minimum measuring interval: 15 seconds
  • Multiple intervals option: up to 7 different intervals
  • Primary/secondary option: temperature as primary
  • Heart rate sampling frequency: 100-800hz
  • Data retention: 25 years
  • Clock: real time clock. Accuracy +/-1 min/month.
  • Communications: communication box, wirelss transmission when dst sits in the box. Connection to pc: usb cable
  • Battery life: 3.5 months*
  • Replaceable battery: no

For a sampling interval of 10 minutes.

Specifications may change without notice.

Extend system with following adds-on
  • COMBOX Communication box with USB converter
  • MERCURY Mercury software for DST system


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