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Temperature measurement during microwave cooking

J Mullin1, J Bows

  • 1Colworth Laboratory, Sharnbrook, Bedford, UK.

Food Additives and Contaminants
|November 1, 1993
PubMed
Summary

Accurate temperature monitoring is crucial for improving microwavable food heating. New methods like fiber optic probes and thermal imaging overcome limitations of traditional sensors in microwave environments.

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Area of Science:

  • Food Science
  • Microwave Engineering
  • Measurement Science

Background:

  • Microwave heating of foods often results in non-uniform temperatures, with overheated edges and underheated centers.
  • Short reheating times limit temperature equilibration, exacerbating uneven heating issues.
  • Conventional temperature sensors (e.g., thermocouples) are unreliable in high microwave electric fields.

Purpose of the Study:

  • To address challenges in measuring food temperatures during microwave heating.
  • To explore alternative temperature measurement techniques suitable for microwave environments.
  • To evaluate the utility of these techniques for developing microwave packaging and testing regimes.

Main Methods:

  • Investigated time-temperature data acquisition for understanding heating patterns.
  • Utilized fiber optic probes as an alternative to conventional sensors.
  • Employed thermal imaging for surface temperature data acquisition.
  • Examined microwave packaging materials heated in situ within a microwave oven.

Main Results:

  • Fiber optic probes provide discrete temperature data, complementing thermal imaging surface data.
  • These advanced techniques offer viable solutions for accurate temperature measurement in microwave cooking.
  • The data generated are essential for establishing effective testing protocols for microwavable products.

Conclusions:

  • Accurate temperature measurement is key to optimizing microwave heating uniformity.
  • Fiber optic probes and thermal imaging are effective tools for in-situ microwave heating analysis.
  • These methods support the development of improved microwaveable food products and packaging.

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