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