For each temperature range
Some applications need heating or cooling by circulation of an external liquid.
A circulation bath is a closed or open container holding a liquid conditioned to a specific temperature. That liquid is then circulated to an application to transfer heat. Circulation baths differ by:
- Required temperature range
- Cooling or heating capacity
- Pump performance
- External application requirements
- Regulatory and sustainability considerations
As official JULABO partner in Belgium, the Netherlands and Luxembourg, Analis helps laboratories choose the right solution based on performance, compliance and lifecycle expectations.
Anticipating the 2027 EU Refrigerant Regulation
The European F-Gas roadmap tightens limits on refrigerants with high Global Warming Potential (GWP). From 2027, servicing and availability of certain refrigerants used in older refrigerated circulators will become increasingly restricted.
Labs running older cooling systems may face:
- Increased refrigerant costs
- Longer maintenance lead times
- Spare part constraints
- Growing compliance and sustainability pressure
JULABO's latest refrigerated circulators already use low-GWP and natural refrigerant technologies, aligned with upcoming European environmental regulations.
Upgrading to modern systems supports:
- Regulatory readiness
- Reduced environmental impact
- Improved energy efficiency
- Secured long-term service continuity
- Optimized total cost of ownership
Learn more about our Refrigerant Transition & Trade-In Program in our latest news update
Request an installed base evaluation
Our temperature control specialists can assess your lab's readiness and support your move to compliant, energy-efficient cooling systems.
What is a recirculating cooler?
A recirculating cooler is a compact, semi-closed chiller/cryostat holding a thermal liquid (mostly water or a water-glycol mix). It circulates the liquid in a closed loop and removes heat from the application via a heat exchanger and a circulation pump.
Designed to replace tap-water cooling and avoid wasting it, recirculating coolers come in various cooling capacities, optionally with a heater. The focus is cooling power rather than temperature stability. Typical uses: cooling the condenser of rotary evaporators or Soxhlet extraction systems.
What is a heating circulator?
Heating circulators are open bath systems (optionally with a cover) holding a thermal liquid (mostly water or thermal oil). They combine a heater, a pump and a temperature sensor for precise control from room temperature up to +300 °C.
They suit internal bath applications or external ones (e.g. temperature control of reactors); an external sensor improves control accuracy in external setups. Temperature profiles can be programmed to adjust automatically over time. A USB, RS232, RS485, Ethernet or Modbus port allows connection to logging software.
What is a refrigerated circulator?
Refrigerated circulators are open bath systems (optionally with a cover) holding a thermal liquid (mostly water, water-glycol or thermal oil). They combine a heater, a cooling coil cooled by environmentally friendly natural refrigerants, a pump and a temperature sensor for precise control from -95 °C to +300 °C.
They suit internal or external applications (e.g. temperature control of reactors); an external sensor improves control accuracy externally. Temperature profiles can be programmed to adjust automatically over time. A USB, RS232, RS485, Ethernet or Modbus port allows connection to logging software.
What is a highly dynamic temperature control system?
Highly dynamic temperature control systems are very compact closed bath systems holding a thermal liquid (mostly thermal oil). They combine a heater, a cooling coil cooled by environmentally friendly natural refrigerants, a magnetically coupled motor-pump and a temperature sensor for precise control from -93 °C to +250 °C. A color touchscreen makes control intuitive.
They are designed for external applications only (e.g. temperature control of reactors). The closed bath can heat the thermal liquid well above its flash point, covering a very wide temperature range without changing the liquid. With no contact with the surrounding air, the thermal oil oxidizes and ages more slowly, and no oil fumes fill the lab.
The very small internal bath gives very fast reaction times. An external sensor improves control accuracy externally, and temperature profiles can be programmed. A USB, RS232, RS485, Ethernet or Modbus port allows connection to logging software.
