KUHNER ISF4-X Cabinet-Style Shaking Incubator

Overview

The KUHNER ISF4-X is a high-capacity, modular cabinet-style shaking incubator engineered for demanding life science applications requiring precise, simultaneous control of temperature, agitation, and—optionally—humidity and CO₂ concentration. Designed and manufactured in Switzerland, the ISF4-X employs a robust stainless-steel chamber architecture (AISI 304) and advanced thermal management systems—including Peltier-based or compressor-assisted cooling—to maintain stable environmental conditions across its 1272 L internal volume. Its core operating principle integrates controlled orbital or reciprocating motion (via brushless DC motors) with microprocessor-regulated heating, refrigeration, and gas exchange, enabling reproducible cultivation of mammalian cells, microbial cultures, protein expression systems, and suspension-based bioprocesses under physiologically relevant conditions. Unlike benchtop shakers, the ISF4-X accommodates up to four independently controllable shaker modules (SF-X trays), each supporting standard formats including flasks (up to 5 L), roller bottles, multiwell plates (e.g., 96-deep-well), and custom bioreactor vessels—making it suitable for scale-up studies, bioprocess development, and GLP-compliant cell banking workflows.

Key Features

• Modular configuration: Supports up to four (or five, when using 96-well deep-well plates) independent SF-X shaker units—each with fully decoupled speed, orbit, acceleration, braking, and positional stop control.
• Precision environmental control: Temperature range from ambient +10°C to 80°C (compressor-equipped models extend down to –10°C); uniformity maintained at ±0.3°C across full tray surface at 37°C per ISO 15189 and ASTM E1672 validation protocols.
• Multi-mode agitation: Selectable circular orbits (Ø12.5 / 25.0 / 50.0 mm) or reciprocating motion (12.5 / 25.0 / 50.0 mm stroke), all adjustable from 20–500 rpm with digital resolution of 1 rpm and accuracy of ±0.5 rpm.
• Optional integrated subsystems: Humidity control (capacitive sensor, 0–85% r.h., ±2% r.h.), CO₂ regulation (NDIR sensor, 0–20% v/v, ±0.4% at 5%), heated observation window (220 W anti-condensation), and UV sterilization (optional).
• Energy-efficient design: Optimized air circulation (700 m³/h), low-power Peltier or variable-speed compressor cooling, and intelligent motor control reduce energy consumption to <1700 W (base model) while maintaining thermal stability.
• Compliance-ready architecture: Built-in audit trail logging (via optional software), configurable user access levels, electronic signatures, and support for FDA 21 CFR Part 11 compliance when paired with validated IQ/OQ documentation packages.

Sample Compatibility & Compliance

The ISF4-X accommodates a broad spectrum of culture vessels—from Erlenmeyer flasks (50 mL to 5 L), Fernbach and spinner flasks, to microtiter plates (96-/384-well), roller bottles, and single-use bioreactors. Its large-format SF-X trays (800 × 420 mm) permit flexible rack integration and support high-density parallel experiments. All internal surfaces are electropolished stainless steel (AISI 304), facilitating validated cleaning and sterilization using common laboratory disinfectants (e.g., 70% ethanol, hydrogen peroxide vapor, or sodium hypochlorite). The system meets IEC 61010-1 for electrical safety and complies with EN 61326-1 (EMC) and EN 60529 (IP20). For regulated environments, optional IQ/OQ qualification documents align with USP <1058>, ISO/IEC 17025, and EU GMP Annex 15 requirements.

Software & Data Management

Control and monitoring are executed via an intuitive, multilingual (DE/FR/IT/EN/ES) touchscreen interface with dedicated parameter screens for each shaker module. System data—including real-time temperature, speed, CO₂, humidity, door status, and alarm history—are logged internally with timestamping and exportable via USB or Ethernet. The optional KUHNER LabControl software enables remote supervision, automated protocol scheduling, trend analysis, and PDF report generation. When configured with digital signature capability and audit trail activation, the platform satisfies FDA 21 CFR Part 11 requirements for electronic records and signatures in clinical and pharmaceutical R&D settings.

Applications

• Mammalian cell culture under controlled CO₂ and humidity (e.g., CHO, HEK293, hybridoma expansion)
• Microbial fermentation and screening (E. coli, yeast, bacilli) across temperature gradients
• Protein expression optimization in shake-flask bioreactors
• Stability testing of biologics and vaccines under agitated thermal stress
• High-throughput screening of metabolic pathways or drug candidates in multiwell formats
• Seed train development and inoculum preparation for upstream bioprocessing

FAQ

What is the maximum number of shaker modules supported?
The ISF4-X supports up to four independently operated SF-X shaker units; with optimized stacking for 96-well deep-well plates, five modules may be installed.
Can the ISF4-X be validated for GMP use?
Yes—KUHNER provides optional IQ/OQ documentation packages, along with calibration certificates traceable to national standards (DKD/DAkkS), supporting qualification in regulated biopharmaceutical environments.
Is CO₂ control available as a factory-installed option?
CO₂ regulation is optional on standard ISF4-X units; however, the ISF4-X(C) variant includes CO₂ control as standard equipment, pre-integrated with NDIR sensing and proportional gas dosing.
What refrigeration technology does the ISF4-X employ?
Two configurations exist: the base model uses thermoelectric (Peltier) cooling; the ISF4-X(C) version features a variable-speed compressor system capable of sub-ambient operation down to –10°C.
How is data integrity ensured during long-term experiments?
Internal non-volatile memory retains all operational logs for ≥30 days; optional software enables encrypted backups, role-based access control, and electronic signature workflows compliant with 21 CFR Part 11.