Low-temperature circulator Models RC6-CS and RC20-CS provide temperature control from -30 to 150°C with a control accuracy to ±0.02°C. Both models are supplied with a stainless steel bath cover, a drain valve, and carrying handles. Circulating liquid contacts only stainless steel. Both models feature a combination pressure and suction pump with a 20L/min flow rate for circulation to open reservoirs or closed external systems. Built-in external controller, adjustable over-temperature and low liquid level shutoff. CFC-free refrigerant.