• Dewpoint and RH readings
• RH accuracy to +/- 1% full scale
• Requires No whirling
• Meets Weather Bureau and Navy specifications

This is the least expensive unit of its kind on the market today. This portable psychrometer indicates wet and dry bulb temperatures for relative humidity and dewpoint determinations. Housed in a high-impact case, the unit consists of a pair of matched thermometers, magnetic fan motor, plastic water bottle, illuminating lamp, psychrometric slide rule, spare parts kit and manual. No whirling of the instrument is required to obtain readings. A miniature fan provides constant air motion over the thermometers. Humidity is determined from the psychrometric tables included with the instrument. Three "D" cell batteries supply about 1000 operations.

22000	C Psychro-dyne (Organic)
22012	C Psychro-dyne (Mercury)
-NIST	NIST Calibration with data