Emerson offers dewpoint sensors designed for indoor and outdoor applications.

Product Information:

210-2002 Indoor Dewpoint (24VAC)
210-2006 Indoor Dewpoint (12VDC or 24VAC)
210-2007 Outdoor Dewpoint (12VDC)Technical Bulletins:

210-2002 Indoor Dewpoint (24VAC)
210-2006 Indoor Dewpoint (12VDC or 24VAC)
210-2016 Indoor Dewpoint & Temp Probe