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This article in AJ

  1. Vol. 67 No. 2, p. 280-281
    Received: July 18, 1974

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An Electro-Optical Temperature Controller for Maintaining a Constant or Relative Temperature1

  1. J. M. Brown2



A simple, inexpensive temperature controller may be constructed utilizing thermistors in a Wheatstone bridge configuration. The unit may be used to maintain a constant temperature or to regulate the temperature of a plant enclosure to that of the naturally varying ambient temperature.

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