Available a Digital Psychrometer. It is a Check-It electronics model # 622. It is the most accurate evaporative type handheld unit to check relative humidity. It can be used in crampted spaces, even in air ducts. It is fast! Readings can be taken in 15 seconds. It is in original box with all instructions and Certification of Calibration. used condition and it appears to work fine.
Contact Bob @ 813-247-5649
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