The DT30 (patented technology) is a precision chilled mirror hygrometer that provides quick and accurate measurements of dew point, air temperature, and humidity measurements. The hygrometer is configured as a tabletop mount for flow through applications. It’s isolated stainless-steel sensor cavity and its sapphire mirror makes it highly resistance to corrosion. User selectable, depending on options, unit displays (3 parameters) Dew Point (DP). Air temperature (T) and Relative Humidity (RH). The unit offers stable, accurate and repeatable measurements that are traceable to NIST.