Julabo CF31 Recirculating Chiller Heater with Programmable Digital Controls

The Julabo CF31 is a versatile and space-saving Cryo-Compact circulator designed for high-precision temperature control in demanding laboratory environments. Engineered to handle both cooling and heating tasks, the CF31 features a powerful integrated pump and sophisticated programmable digital controls, making it ideal for controlling the temperature of external systems such as refractometers, viscometers, and small bioreactors. Its compact "Cryo-Compact" footprint is specifically designed to minimize bench space while providing industrial-grade thermal stability.

Technical Performance and Design

• Wide Temperature Range: Capable of operating from -30°C to +200°C, providing a flexible solution for both sub-ambient cooling and high-temperature heating applications.

• Sophisticated PID Control: Utilizes advanced ICC (Intelligent Cascade Control) PID technology to maintain temperature stability of ±0.02°C, ensuring reproducible results for sensitive experiments.

• High-Performance Pressure Pump: Features a robust pump system with an adjustable flow rate of up to 15 L/min and 0.35 bar pressure, optimized for efficient fluid circulation through external loops.

• Cryo-Compact Footprint: The upright, narrow design (only 24 cm wide) allows the unit to fit into tight spaces or even inside a fume hood without sacrificing thermal capacity.

Product Specifications

• Model: CF31

• Working Temperature Range: -30°C to +200°C

• Temperature Stability: ±0.02°C

• Cooling Capacity: 0.32 kW at +20°C / 0.15 kW at -20°C

• Heating Capacity: 2 kW

• Pump Flow Rate: 15 L/min (adjustable)

• Bath Volume: 3.5 Liters

Programmable Digital Controls

• Intuitive VFD Display: Features a bright Vacuum Fluorescent Display and an additional LCD for simultaneous monitoring of setpoints, actual values, and high/low temperature warnings.

• Integrated Programmer: Includes a built-in timer and programmer for creating complex temperature profiles and automated ramp/soak cycles.

• Safety & Warning Systems: Equipped with adjustable high-temperature cut-off and low-liquid level protection to prevent equipment damage or dry-running.

• Digital Communication: Standard RS232 interface allows for remote PC control and data logging via Julabo EasyTemp software.

Operational Advantages

• Rapid Cool-Down: The high-efficiency refrigeration system provides quick pull-down times, reducing wait intervals between different experimental phases.

• Quiet Operation: Engineered with low-noise fans and a vibration-damped compressor, maintaining a focused and comfortable laboratory workspace.

• Front-Access Drain: Features an easily accessible drain tap on the front of the unit, simplifying fluid changes and routine maintenance.

• Splash-Proof Keypad: The control surface is protected by a durable, easy-to-clean membrane that resists chemical spills and moisture ingress.

Used, like-new condition; see video here.