Compact
Sling Psychrometer

Sling psychrometers are known for great accuracy, dependable results within about 90 seconds, and independence from batteries. The procedure is simple enough: wet the wick, swing the instrument until the wet bulb reading goes no lower, then take the wet-bulb and dry-bulb readings to the tables or slide rule supplied to determine relative humidity. It¹s a traditional and always reliable process.

Sling Psychrometer
#NSP01List Price $100.00Only $80.00