Product Description Two-Point 33% and 75% RH Humidity Field Calibration Kit for Weather Station Hygrometers This kit has a 33% and 75% RH Humidity packages that keep the 33% and 75% relative humidity for the release and absorption of water vapor, if necessary through the membrane, re-sealable 4 "x 8" resealable bag (each) multiple uses.
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Tags: Calibration, Field, humidity, Hygrometers, Station, TwoPoint, Weather