Maybe.  The ETC was designed specifically to control EXAIR Cabinet Coolers, and the temperature range is limited as shown in question #1 to a range that is appropriate for the application.  The ETC could be used in conjunction with an EXAIR Vortex Tube provided that the temperature required for your application fell within the  80ºF to 120ºF (approximately 27ºC to 49ºC) range of the ETC.  Please contact an Application Engineer to discuss your application requirements.