CFC-free refrigeration (optional for customer;s request refrigeration R507,R410a) and 7'' touch ... condenser lowest temperature.304 or 316 stainless construction.CFC-free refrigeration.(optional for customer’s request refrigeration:R507,R410A, etc.) Heating ... parameters include vacuum, condenser temperature, run time, ambient temperature. For water based samples, the -55C condenser is the perfect choice ...