Kuhner LT-X/XC Advanced Shaking Incubator
| Brand | ADOLF KUHNER |
|---|---|
| Origin | Switzerland |
| Model | LT-X/XC |
| Instrument Type | Temperature-Controlled Orbital/Linear Shaking Incubator |
| Speed Range | 20–500 rpm |
| Speed Accuracy | ±0.5 rpm |
| Temperature Range | Ambient +10 °C to 80 °C (LT-XC: 5–60 °C with enhanced stability) |
| Chamber Volume | 260 L |
| Drive System | Brushless Magnetic Direct Drive |
| Oscillation Modes | Orbital (Ø12.5 / 25.0 / 50.0 mm), Linear (12.5 / 25.0 / 50.0 mm) |
| Temperature Uniformity | ±0.25 °C at 37 °C (across tray, LT-XC variant) |
| Humidity Control | Up to 85 % RH (optional) |
| CO₂ Control | 0–20 % (IR sensor, ±0.4 % accuracy at 5 % CO₂, standard on LT-XC) |
| O₂ Control | 0–20.9 % (zirconia sensor, optional) |
| Airflow | 160 m³/h |
| Power Supply | 220–240 V / 50–60 Hz |
| Weight | 170 kg |
| IP Rating | IP22 (splash-protected drive) |
| Warranty | 5-year manufacturer warranty |
Overview
The Kuhner LT-X/XC is a high-performance, modular shaking incubator engineered for demanding applications in biopharmaceutical process development, mammalian and microbial cell culture, fermentation screening, and aerobic microbiology. Built upon Kuhner’s proprietary single-axis magnetic direct drive technology, the system eliminates mechanical transmission components—such as belts, gears, or eccentric cams—ensuring zero maintenance, long-term speed stability, and vibration-free operation critical for sensitive suspension cultures. Unlike conventional shakers relying on cam-based orbital motion, the LT-X/XC generates true sinusoidal orbital or linear oscillation via electromagnetic actuation, enabling precise amplitude and frequency decoupling. This architecture supports reproducible shear environments across diverse vessel formats—from 25 mL test tubes to 6 L baffled flasks—while maintaining thermal homogeneity within ±0.25 °C (at 37 °C) across the full 260 L chamber volume. The unit operates in ambient +10 °C to 80 °C range (LT-X) or 5–60 °C with enhanced control fidelity (LT-XC), and integrates seamlessly into GxP-compliant workflows through FDA 21 CFR Part 11–ready software and audit-trail-capable interfaces.
Key Features
- Brushless magnetic direct drive system: Eliminates wear-prone mechanical components; rated for >20,000 hours continuous operation without service interruption.
- Multi-mode oscillation: Selectable orbital (Ø12.5 / 25.0 / 50.0 mm) or linear (12.5 / 25.0 / 50.0 mm) motion profiles, each with independent speed calibration and programmable acceleration/deceleration ramps.
- Modular chamber design: Stainless steel interior with integrated drain port and UV-compatible surface finish; compatible with aqueous disinfectants and optional internal UV-C irradiation module (254 nm).
- Dual-stack capability: Two LT-X/XC units can be vertically stacked without structural reinforcement or custom mounting hardware—optimized for space-constrained cleanrooms and BSL-2 laboratories.
- Enhanced safety architecture: Interlocked door switch halts all motion immediately upon opening; auto-resume after secure closure; overtemperature, overcurrent, and motor stall protection embedded in firmware.
- Configurable environmental control: Standard CO₂ regulation (0–20 %, NDIR sensor) on LT-XC models; optional humidity (capacitive sensor, 20–85 % RH), O₂ (zirconia electrochemical sensor), and LED photosynthetic lighting modules.
Sample Compatibility & Compliance
The LT-X/XC accommodates a broad spectrum of culture vessels via interchangeable EX-series trays (500 × 420 mm footprint). Standard configurations include universal EXU trays fitted with removable clamps for Erlenmeyer flasks (25–6000 mL), centrifuge tube racks (72 × 50 mL Falcon/TPP), microtiter plate carriers (24/48/96-well, stackable up to 4 plates), and adhesive-strip platforms for low-shear applications (<200 rpm). All tray systems comply with ISO 13485–aligned manufacturing protocols and are validated for autoclave compatibility (121 °C, 20 min). The chamber meets IEC 61010-1:2010 safety requirements for laboratory equipment and is designed to support GLP/GMP documentation practices—including temperature mapping per ASTM E2874, CO₂ sensor calibration traceable to NIST standards, and humidity uniformity verification per ISO 16777.
Software & Data Management
Kuhner Insight software provides a validated, role-based interface for real-time monitoring, parameter logging, alarm management, and electronic batch record generation. Data acquisition occurs at 1 Hz resolution for temperature, speed, CO₂, O₂, and humidity (when equipped), with time-stamped values stored locally and exportable in CSV, PDF, or XML formats compliant with 21 CFR Part 11 Annex 11 requirements. The system supports Ethernet (TCP/IP), USB, and CAN bus connectivity; optional NET-60 gateway enables integration into enterprise SCADA or MES platforms via OPC UA or Modbus TCP. Audit trails capture user login/logout events, parameter changes, alarm acknowledgments, and firmware updates—with immutable timestamping and digital signature capability. Remote access is secured via TLS 1.2 encryption and configurable firewall rules.
Applications
- Mammalian cell line development: High-density CHO and HEK293 suspension cultures under tightly controlled pH (via CO₂), dissolved oxygen (via O₂/N₂ blending), and temperature gradients.
- Microbial fermentation optimization: E. coli, Pichia pastoris, and Bacillus subtilis growth studies requiring precise agitation-to-oxygen-transfer ratio tuning across multiple amplitudes and speeds.
- Bioprocess scalability: Parallel screening of 24–96 well microtiter plates under identical environmental conditions to de-risk transition from shake flask to bioreactor scale.
- Vaccine and viral vector production: Adherent cell expansion on microcarriers in static/shaking hybrid mode using integrated fixed shelves (up to two levels).
- Environmental microbiology: Aerobic enrichment of soil or water isolates under variable O₂ tension and thermal regimes mimicking natural niches.
FAQ
What is the maximum flask size supported by the LT-X/XC chamber?
The chamber accommodates up to six 6 L baffled flasks simultaneously when using the standard EX tray with Ø50 mm orbital motion.
Can the LT-X/XC operate under sterile conditions?
Yes—the stainless steel chamber, IP22-rated drive enclosure, and optional UV-C lamp enable routine decontamination between runs; validation protocols for ISO 5 cleanroom integration are available upon request.
Is CO₂ control included in all LT-X/XC models?
CO₂ regulation is standard on LT-XC variants; LT-X base models require optional retrofitting.
How is temperature uniformity verified across the chamber volume?
Kuhner provides factory-issued temperature mapping reports per ASTM E2874, conducted using ≥15 calibrated Pt-100 probes distributed across three vertical planes.
Does the system support 21 CFR Part 11 compliance out of the box?
Yes—Kuhner Insight includes electronic signatures, audit trail logging, and role-based access control; full validation documentation (IQ/OQ/PQ templates) is supplied with each unit.
