The uniquely compact Sling Psychrometer accurately determines percent relative humidity without the necessity of consulting complex tables.
There is no wet the wick each time a reading is taken;the Sling Psychrometer contains a slide rule calculator which correlates wet and dry bulb thermometer indications for direct reading of relative humidity.When not in use,the thermometer case telescopes into the handle for protection.


Features
   Designed for portability (7.5"long×1" diameter)

   Duel range (high & low temperature) scales for better resolution.

   Slide rule construction quickly converts temperature to relative humidity

  Available with either red spirit-filled thermometers or mercury-filled thermometers.

  Thermometers telescope into handle for protection when not in use.

  Built-in water reservoir holds sufficient water for several hours of testing.