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Inexpensive Microwave Survey Instruments: An Evaluation

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William A. Herman, Donald M. Witters, Jr. · 1979

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Cheap EMF detection devices often provide unreliable readings that can miss real hazards or trigger false alarms.

Plain English Summary

Summary written for general audiences

Government researchers in 1979 tested cheap microwave detection instruments that consumers and repair shops were using to check microwave oven safety. They found significant reliability problems with these devices, which could either miss real hazards or trigger false alarms that cost consumers unnecessary repair visits.

Why This Matters

This 1979 Bureau of Radiological Health study reveals a critical problem that persists today: the challenge of accurately measuring EMF exposure. While this research focused on microwave ovens, the core issue applies to all EMF measurement devices flooding the consumer market. The reality is that reliable EMF detection requires sophisticated, expensive equipment and proper calibration. When inexpensive meters give false readings, people either live with dangerous exposures they can't detect or waste money on unnecessary remediation. What this means for you is that those $50 EMF meters on Amazon may not be giving you accurate information about your actual exposure levels. The science demonstrates that proper EMF assessment requires professional-grade equipment, not consumer gadgets that may provide a false sense of security or unnecessary alarm.

Exposure Information

Specific exposure levels were not quantified in this study.

Cite This Study
William A. Herman, Donald M. Witters, Jr. (1979). Inexpensive Microwave Survey Instruments: An Evaluation.
Show BibTeX
@article{inexpensive_microwave_survey_instruments_an_evaluation_g4690,
  author = {William A. Herman and Donald M. Witters and Jr.},
  title = {Inexpensive Microwave Survey Instruments: An Evaluation},
  year = {1979},
  
  
}

Quick Questions About This Study

Consumer and repair shop interest in inexpensive microwave detection devices prompted the Bureau of Radiological Health to evaluate their accuracy compared to sophisticated regulatory instruments used for precise measurements.
The instruments produced unreliable readings that could be either erroneously low (missing real hazards) or erroneously high (causing unnecessary expensive repair calls for consumers).
The fundamental challenge remains the same: inexpensive consumer EMF detection devices often lack the precision and calibration of professional-grade equipment, potentially providing misleading exposure information.
Under the Radiation Control for Health and Safety Act of 1968, they were responsible for developing and assessing methods to measure radiation emissions from electronic products like microwave ovens.
Yes, researchers solicited comments from the manufacturers of the tested instruments and incorporated their responses into the final evaluation report documenting the devices' performance issues.