Steady State Humidity Chambers are used in outstanding reliability and long service life in some of the most demanding environmental testing applications. They cover an exceptionally broad range of operating conditions. These are easy to program, and provide results that are measurably better today and over the long haul. The temperature range is -65°C above ambient to +93°C. They have motorized intake damper and glass observation panel. They also have safety airflow switch on single-phase models.