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Home > Overstock Items > MAX / MIN Thermometer > MAXIMUM / MINIMUM Thermometer

Model Number MMG-3

The Palmer MMG-3 MAXIMUM / MINIMUM thermometer records the highest and lowest temperatures seen by the thermometer between settings. A "U" shape tube holds a clear liquid and columns of mercury. As the temperature increases, the liquid expands forcing the mercury up the maximum scale. When the temperature falls, the liquid contracts and the mercury follows it back up the minimum scale. Small glass and wire floats called limit markers are pushed to the temperature limits by the two sides of the mercury column. The markers are held in position by a magnet in the back of the case and the maximum / minimum temperatures are read at the bottom point of the markers. A setting magnet will easily reset both scales so you can take periodic readings without worrying about recording the wrong information. The current or immediate temperature can always be read at the top of the mercury column as in a single tube thermometer.
  • MIN. -40F to 120F
  • MAX. 120F to -40F
  • FILL - Mercury Filled

It is important to note that the minimum scale is inverted with the lower temperatures above the higher. Until you become accustomed to reading this "upside down" scale, some care may be required to get accurate readings.

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    Palmer Wahl Instrumentation Group
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    Asheville, NC 28804
    828-658-3131    800-421-2853

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