Degree-Day monitoring:

An intelligent degree-day sensor that can be customized to your application.

The LifeTrack eTTI (electronic time-temperature integrator) tag is a new type of low-cost degree-day monitor.  Programmed with your application's precise time-temperature sensitivity curve, it can monitor degree-day statistics for time intervals ranging from days to years, constantly monitoring the impact of temperature and time, and generating a running total of the accumulative impact of time and temperature.

The LifeTrack computes the integral of time and a user programmed degree-day temperature function, and can also test if the function has exceeded a predetermined cutoff value.

Example of a LifeTrack display showing if a preset degree-day criteria has been met yet or not (here the criteria have not been met yet, and the process is only about 25% complete).

Intelligent monitoring:

Each LifeTrack unit is flash-programmed with the precise details of your application's temperature sensitivity.  The LifeTrack unit can be programmed with even complex degree-day criteria, such as upper and lower development thresholds, horizontal, intermediate and vertical cutoff methods, and other parameters.  The unit is so low cost that many LifeTrack units can be used to give a comprehensive set of degree-day statistics throughout a large area. 

Logging and temperature statistics: 

The LifeTrack unit outputs degree-day statistics, and other temperature history data, through its onboard infrared serial port.  This port, which sends data to the RS232 interface of essentially any computer through a low-cost download cable, provides flexibility and easy manipulation of the output data.  Each unit also has unique security codes and individual serial numbers to help guard against tampering or misuse.   A 60x speed "QC test mode" enables the unit to be rapidly validated.


What can it monitor?  With a standard battery life of up to three years, the LifeTrack can monitor degree-day statistics for any system operating from -20 oC to 70 oC, and from 1 day to three years, including:

  • Accumulated degree days
  • Agricultural products
  • Cutoff temperature sensitivity
  • Degree-day statistics
  • Energy use
  • Heating and cooling
  • Linear temperature sensitivity
  • Nonlinear temperature sensitivity
  • Pest management
  • Plant growth
  • Threshold temperature sensitivity

and nearly any other system where time-temperature history is critical.

  EN61000-6-1, EN61000-6-3, EN61000-4-2, EN610004-3, EN61000-4-8;  FCC 15B

Degree-day growing season map of the US