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 that contains a liquid that is conditioned to a specific temperature. This liquid is then circulated to an application to transfer heat. There are different types of circulation baths depending on:
- 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 supports laboratories in selecting the optimal solution based on performance, compliance and lifecycle expectations.
Anticipating the 2027 EU Refrigerant Regulation
The European F-Gas roadmap introduces stricter limitations on high Global Warming Potential (GWP) refrigerants. From 2027 onwards, servicing conditions and availability of certain refrigerants used in older refrigerated circulators will become increasingly restricted.
Laboratories operating legacy cooling systems may experience:
- Increased refrigerant costs
- Longer maintenance lead times
- Spare part constraints
- Growing compliance and sustainability pressure
JULABO’s latest generation refrigerated circulators already integrate low-GWP and natural refrigerant technologies, aligned with upcoming European environmental regulations.
Upgrading 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 are available to assess your laboratory’s readiness and support your transition toward compliant and energy-efficient cooling systems.
What is a recirculating cooler?
A recirculating cooler is a kind of compact semi-closed chiller/cryostat that contains a thermal liquid (mainly water or a water-glycol mixture). The aim is to circulate the liquid in a closed circuit and to remove heat out of the application by circulating the chilled liquid with the help of a circulation pump via a heat exchanger. They have been designed to replace tap water cooling solutions and to avoid spoiling it. They are available in different cooling power versions and optionally with a heater. Focus is on the cooling power and not on the accuracy-stability of the temperature. Typical applications: cooling down the condenser of rotary evaporators or Soxhlet extraction systems.
What is a heating circulator?
Heating circulators are open bath systems (eventually with cover) that contain a thermal liquid (mainly water or thermal oil). The heating circulators consist of a heater, a pump and a temperature sensor to allow a precise temperature control in a temperature range going from room temperature up to +300°C. They have been designed for internal bath applications or external applications (ex. temperature control of reactors). With an external temperature sensor the control precision in external applications can be improved. Temperature profiles can be programmed to adjust the temperature automatically over time. Via an USB, RS232, RS485, Ethernet or Modbus port it is possible to connect the heating circulator to a logging software.
What is a refrigerated circulator?
Refrigerated circulators are open bath systems (eventually with cover) that contain a thermal liquid (mainly water, water-glycol or thermal oil). The refrigerated circulators consist of a heater, a cooling coil cooled via environmentally-friendly natural refrigerants, a pump and a temperature sensor to allow a precise temperature control from -95°C to +300°C. They have been designed for internal bath applications or external applications (e.g. temperature control of reactors). With an external temperature sensor, the control precision in external applications can be improved. Temperature profiles can be programmed to adjust the temperature automatically over time. Via an USB, RS232, RS485, Ethernet or Modbus port it is possible to connect the heating circulator to a logging software.
What is a highly dynamic temperature control system?
Highly dynamic temperature control systems are very compact closed bath systems that contain a thermal liquid (mainly thermal oil). The highly dynamic temperature control systems consist of a heater, a cooling coil cooled via environmentally friendly natural refrigerants, a magnetic coupled motor-pump and a temperature sensor to allow a precise temperature control from -93 to +250°C. Equipped with a colour touchscreen, a user-friendly and intuitive control is possible. They have been designed for exclusive external applications (e.e. temperature control of reactors). The closed bath system allows the control system to heat up the thermal liquid far above its flashpoint, allowing to cover a very broad temperature range without the need to change the thermal liquid. No contact with the environment avoids also the fast oxidation and aging of the thermal oil. No oil fumes will fill the lab thanks to this design. The very small internal bath allows very quick reaction times. With an external temperature sensor the control precision in external applications can be improved. Temperature profiles can be programmed to adjust the temperature automatically over time. Via an USB, RS232, RS485, Ethernet or Modbus port it is possible to connect the heating circulator to a logging software.
