Julabo Ultra-Low circulator SL

Julabo SL Ultra-Low Temperature Circulating Bath

The Julabo SL Ultra-Low Temperature Circulating Bath is the precise solution for laboratories and industrial applications where reliable temperature control in the ultra-low temperature range is essential. With an impressive temperature range from -90°C to +100°C, the device effortlessly meets demanding requirements in the chemical and pharmaceutical industries, materials testing and cryogenics. High temperature stability, powerful pump technology and state-of-the-art control make this system the preferred choice over conventional refrigeration thermostats for extreme applications where precision and reliability are top priorities.

Performance and technology at the highest level

The device impresses with its intelligent combination of powerful cooling technology, customer-specific flexibility and easy integration into existing laboratory networks. Particularly noteworthy is the excellent temperature stability of ±0.05 °C, which makes working with high or low temperature processes particularly safe and reproducible. Thanks to the high-resolution LCD dialogue display, operation is intuitive and enables continuous monitoring of all parameters - a decisive advantage in demanding, automated laboratory processes and in continuous operation.

Main technical features at a glance

• Temperature range: -90°C to +100°C
• Temperature stability: ±0.05°C
• Pump capacity: 0.4 to 0.7 bar (22 to 26 l/min flow rate)
• Heating capacity: 3 kW
• Filling volume: up to 22 litres (depending on model)
• Interfaces: RS232/RS485 for real-time integration and remote monitoring
• IP protection class: IP 21 according to IEC 60529 (protection against solid foreign bodies >12.5 mm, dripping water)

The dimensions of the device (59 cm × 76 cm × 116 cm) and its robust weight of 201 kg underline its industrial orientation - exceptional performance even with high demands on robustness and durability in continuous use.

The RS232/RS485 interfaces enable seamless integration into higher-level systems and easy connection to external process control technology. The flexible communication capability is a clear advantage for laboratories where digitalisation and automation play a central role.

The safety features comply with protection class IP 21, which guarantees reliable protection against larger foreign objects and dripping water in accordance with IEC 60529 - important for daily use even under challenging laboratory conditions.

The clear LCD dialogue display contributes to user-friendly control, allowing all settings, operating states and fault messages to be clearly read and operated. The self-optimising ICC (Intelligent Cascade Control) temperature control, in combination with temperature control features, ensures maximum precision and fast response times.

Certifications and standards

The system is certified according to IEC 60529 and meets IP 21 protection requirements, which is crucial for research, development and industrial processes. This ensures maximum safety for users and hardware, especially in environments with increased risk from dripping water or dirt.

Typical areas of application

The SL cryogenic circulating thermostat is indispensable in various industries and offers the following practical applications:

• Cryogenic applications: Monitoring and control of sample storage, e.g. of biological samples, blood, tissue or cell lines
• Pharmaceutical processes: Cooling and temperature control of temperature-sensitive active ingredients and intermediate products, transport fluids such as ethanol and isopropanol
• Chemical synthesis and material development: Precise temperature control in reactor processes with substances such as solvents, catalysts or polymer melts
• Materials testing: Cold and shock tests for plastics, metals and materials to simulate extreme conditions

Substances that are frequently used in such low-temperature processes include: methanol, ethanol, glycerine, various refrigerants and solvents that require low temperatures and high temperature stability.

FAQs

How is the temperature controlled in this circulating thermostat?

Temperature control is achieved by self-optimising, intelligent ICC (Intelligent Cascade Control) control electronics, supported by Temperature Control Features (TCF) for extremely precise control behaviour.

What protection does IP 21 offer for use in laboratories or industry?

IP 21 guarantees protection against the ingress of solid foreign bodies >12.5 mm and dripping water, ensuring safe operation even under difficult operating conditions.

Can the thermostat be integrated into automated processes?

Thanks to the integrated RS232 and RS485 interfaces, the device is ideally suited for connection to higher-level control and monitoring systems and can be easily integrated into automated laboratory networks.

What maintenance conditions should be observed?

The device is designed for continuous operation in industrial environments and has low maintenance requirements. Regular checks of the fill volume and inspection of the inlet and outlet filters are recommended to ensure consistently high performance and longevity.

Conclusion

The SL cryogenic circulator from JULABO is designed for professional users who demand the highest standards of temperature precision, reliability, and functionality. Its extraordinary temperature range, sophisticated safety technology and seamless system integration make it a central component in research laboratories, the chemical and pharmaceutical industries, and complex material testing. For cryogenic applications that require maximum control and process reliability, this device is clearly the first choice.