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Versatile bipolar temperature controller for custom in vitro applications.

Sabrina Asteriti1,2, Lorenzo Cangiano1

  • 1Dept. of Translational Research, University of Pisa, Pisa, Italy.

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Summary
This summary is machine-generated.

This study presents a versatile, custom-built temperature controller for biological tissue research. It offers precise heating and cooling with simple instructions for modeling and optimization, outperforming commercial models.

Keywords:
Control systemCoolingElectrophysiologyHeatingIn vitroTemperature

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Area of Science:

  • Biophysics
  • Physiological Measurement
  • Instrumentation Engineering

Background:

  • Effective temperature control is critical for studying isolated biological tissues.
  • Custom-designed temperature controllers offer greater flexibility than commercial options for specialized applications.

Purpose of the Study:

  • To present a versatile temperature controller for precise heating and cooling.
  • To provide instructions for modeling, optimizing, and assembling the apparatus.

Main Methods:

  • Utilized analog components and linear stages for simplified circuit design and customization.
  • Incorporated LMT70A linear microchip sensors for accurate temperature monitoring.
  • Developed a rackable enclosure with BNC outputs for data acquisition.

Main Results:

  • Achieved fast temperature transitions with minimal static error and overshoot across a wide range.
  • Demonstrated rapid heating (23°C to 37°C in ~1 min) and cooling (23°C to 3°C in ~4 min).
  • Controller power output: -23.5 W/+22.0 W (-4.7 V/+4.4 V, ±5.0 A).

Conclusions:

  • The custom temperature controller provides a flexible and efficient solution for biological research.
  • Biologists with technical skills can replicate the device following the provided instructions.