The compact Bacharach Sling Psychrometer uses the accurate wet bulb-dry bulb thermometer principle to provide a simple, rapid measurement of relative humidity without tables, charts, or formulas. Portable and non-electronic, the sling psychrometer consists of two thin bulb thermometers and a refillable water reservoir in a high-strength plastic case. There is no need to wet the wick each time a reading is made. The case is simply whirled freely in the hand; wet and dry bulb temperature readings are taken; and percent relative humidity is determined from the built-in slide rule on the handle. When not in use, the thermometer case telescopes into the handle for protection.
Easy to use and designed for portability. Slide rule construction quickly converts temperature to relative humidity. Built-in reservoir holds sufficient water for several hours of testing. Thin thermometer bulb gives fast thermal response. Thermometers constructed of shock-resistant glass. Stems have deep-etched numerals and 1° scale divisions for easy reading. Inexpensive, reliable and accurate.
