1,high quality with low price
2,portable
3,long time life
4,

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 ( 7.5long×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.

Applications
Measurement of comfort conditions in air conditioned environments,hospital operating rooms,storage areas and laboratories Tests in industrial atmospheres where high or low humidity may be critical in manufacturing processes School athletics-to determine safe conditions for practice