Pocket instrument indicates relative humidity

• Publisher: Elsevier Science
• Year: 1950
• Tongue: English
• Weight: 76 KB
• Volume: 250
• Category: Article
• ISSN: 0016-0032
• DOI: 10.1016/0016-0032(50)90453-4

✦ Synopsis

Pocket Instrument Indicates Relative Humidity.--A precision pocket instrument, shorter than a pencil, that shows relative humidity by the accurate wet-and-dry bulb method has been developed by the Weston Electrical Instrument Corp. Known as the "TAG" Pocket Humidicator Model 8704, this compact new instrument can be used either in the hand or mounted on a wall. A simple built-in slide rule converts the wet-bulb and dry-bulb readings directly into relative humidity, eliminating charts or tables.

This new "TAG" device consists of two etched scale glass thermometers, individually hand-calibrated for permanently accurate readings. These are secured in a sturdy white plastic case by integral resilient mountings. The psychometric slide rule forms the cover of this case. For use, a few drops of water are applied to the thermometer wick, and the instrument is fanned or swung for several moments. Setting the wet-bulb reading opposite the dry-bulb reading on the slide rule then indicates relative humidity.

The "TAG" Pocket Humidicator has a wide field of application in heating, air conditioning, ventilating, refrigeration, industrial and chemical processing where the per cent of atmospheric humidity is a factor.