Stuart SI600C/IQOQ Large-Capacity Refrigerated Orbital Incubator Shaker

Overview

The Stuart SI600C/IQOQ is a large-capacity refrigerated orbital incubator shaker engineered for demanding life science applications requiring precise temperature control combined with consistent orbital agitation. Unlike standard CO₂ incubators or standalone shakers, the SI600C integrates a thermoelectrically assisted cooling system—when paired with an external recirculating chiller such as the SRC4—to achieve stable sub-ambient operation down to 5°C. Its core measurement principle relies on microprocessor-controlled PID regulation of both heating elements and chilled fluid exchange, ensuring high reproducibility in temperature-sensitive biological workflows including recombinant protein expression, microbial growth kinetics, and suspension-based mammalian cell culture. The unit operates without internal humidity control, making it suitable for applications where condensation risk must be minimized and where media evaporation is managed externally via sealed vessels or paraffin oil overlay.

Key Features

• Refrigerated orbital shaking platform with integrated temperature control from ambient −15°C to +60°C (minimum operational setpoint: 5°C)
• 115 L internal chamber volume with optimized airflow architecture for ±0.5°C temperature uniformity across full load
• Digital LED interface with independent temperature and speed controls; 0.1°C resolution and ±0.5°C accuracy
• Orbital motion at 30–300 rpm with programmable ramp-up (soft-start) to prevent sample splashing or shear-induced cell damage
• Retractable stainless-steel platform (520 × 390 mm) with Magnalock™ magnetic attachment system for rapid accessory installation/removal
• Adjustable-angle tube holders (up to 30° tilt) compatible with 1.5 mL, 15 mL, and 50 mL tubes; also supports flasks up to 2 L (e.g., 2 × 2000 mL, 9 × 1000 mL, or 15 × 500 mL)
• Dual-pane anti-condensation glass viewing windows on door and side panels for real-time visual monitoring under low-temperature conditions
• Programmable digital timer (1 second to 9 days) with audible alarm upon completion; shaker stops while incubation continues for safety-critical continuity
• USB port enabling long-term data logging via proprietary Stuart software—supports unattended weekend runs and audit-ready thermal profiling

Sample Compatibility & Compliance

The SI600C accommodates a broad range of vessel formats used in upstream bioprocessing and academic research laboratories. Its mechanical design permits use of Erlenmeyer flasks, baffled flasks, serum bottles, and multi-well plates when mounted on compatible carriers. All stainless-steel accessories meet ISO 8573-1 Class 3 purity standards for non-sterile laboratory equipment handling. While the instrument itself does not provide ISO 14644-1 certified cleanroom performance, its sealed chamber and absence of internal humidification reduce microbial proliferation risk. The /IQOQ variant includes documented Installation Qualification (IQ) and Operational Qualification (OQ) protocols aligned with GLP and GMP expectations—supporting regulatory submissions under FDA 21 CFR Part 11 when paired with validated software configurations.

Software & Data Management

Stuart’s dedicated monitoring software connects via USB to record time-stamped temperature and speed profiles at user-defined intervals. Data exports in CSV format for integration into LIMS or ELN platforms. The software supports configurable alert thresholds, event logging (e.g., door opening, power interruption), and password-protected parameter locking—essential for multi-user environments requiring traceability. All recorded sessions include metadata tags for operator ID, protocol name, and instrument serial number, satisfying basic ALCOA+ principles for data integrity in regulated labs.

Applications

• Suspension culture of CHO, HEK293, and insect cells under tightly controlled thermal and agitation conditions
• Low-temperature induction of cold-shock proteins and T7 RNA polymerase systems in E. coli
• Enzyme activity assays requiring simultaneous temperature stabilization and mixing
• Microbial fermentation studies across psychrophilic to mesophilic ranges
• Long-duration stability testing of biologics in solution-phase storage containers
• Preparative-scale plasmid DNA amplification using autoinduction media

FAQ

Does the SI600C include built-in CO₂ control?
No. The SI600C is a refrigerated orbital incubator shaker—not a CO₂ incubator. It lacks gas regulation hardware and is intended for applications where pH buffering is achieved chemically (e.g., HEPES) or physically (sealed vessels).
Is external chiller connectivity mandatory for sub-ambient operation?
Yes. To reach temperatures below ambient (down to 5°C), connection to a recirculating chiller such as the Stuart SRC4 is required. The unit has integrated coolant ports and flow-sensing interlocks.
Can the SI600C be validated for GxP environments?
The /IQOQ version ships with pre-executed qualification documentation, including test scripts, raw data templates, and acceptance criteria aligned with ASTM E2500 and EU Annex 15. Final PQ remains site-specific.
What is the maximum flask size supported on the standard platform?
Up to two 2 L Erlenmeyer flasks or equivalent total volume (10 kg max load); larger vessels require custom mounting solutions.
Is firmware upgrade capability available?
Yes—via USB using Stuart-provided update utilities. Version history and release notes are accessible through the Stuart Technical Support Portal.