hygrometer
Extech RH550: Humidity/Temperature Chart Recorder with Touch Screen Datalog relative humidity, temperature, and calculated dew point on interactive, 7-inch (178 mm) color screen
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FLIR MR176 IGM™ Moisture Meter with Replaceable Hygrometer Featuring Infrared Guided Measurement (IGM) technology powered by a built-in FLIR Lepton® 80 x 60 thermal imaging sensor, the MR176 visually guides you to the precise spot that moisture may be hiding. Use the integrated laser and crosshair to help pinpoint the surface location of the issue found with IGM.
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