Stuart SSL3 & SSL4 Universal Orbital and Rocking Shakers

Overview

The Stuart SSL3 and SSL4 Universal Shakers are precision-engineered benchtop platforms designed for reproducible, low-shear agitation in life science laboratories. Built to ISO 9001-certified manufacturing standards in the UK, these shakers employ distinct motion profiles optimized for specific biological workflows: the SSL3 utilizes a three-dimensional orbital rotation (with adjustable tilt angle), while the SSL4 delivers a controlled rocking motion with fixed 7° oscillation. Both models operate within an ambient temperature range of +4 °C to 40 °C and up to 80% relative humidity—making them compatible with incubator-integrated setups and environmental chambers. Their quiet, brushless DC motor architecture ensures continuous, vibration-damped operation ideal for sensitive cell culture, nucleic acid extraction, blotting procedures, and long-duration assays requiring minimal mechanical stress.

Key Features

• Large 355 × 355 mm platform surface engineered for multi-user lab environments and high-throughput sample handling.
• Digital speed control (5–70 rpm) with encoder-based rotary knob and backlit LCD display for precise parameter setting and real-time monitoring.
• Integrated programmable timer enabling repeatable run durations without manual intervention—critical for GLP-compliant protocols.
• Non-slip silicone matting and magnetic locking system for rapid, tool-free installation of optional multi-tier platforms (SSM3/1 kit), tripling effective sample area.
• Robust aluminum housing with reinforced base structure ensuring mechanical stability at all operating speeds and load conditions (up to 10 kg).
• Energy-efficient 50 W power consumption and CE-marked 230 V / 50 Hz input—designed for continuous-duty laboratory use under standard European electrical infrastructure.

Sample Compatibility & Compliance

The SSL3 is validated for applications requiring gentle yet thorough mixing—including DNA isolation, Western/Northern blot transfer, and rehydration of lyophilized reagents—where low-foaming orbital motion minimizes bubble formation and interfacial shear. The SSL4’s rocking action replicates physiological fluid dynamics in flasks and Petri dishes, supporting adherent and suspension cell cultures without compromising monolayer integrity. Both units comply with IEC 61000-6-3 (EMC emissions) and IEC 61000-6-2 (immunity), and their construction meets RoHS Directive 2011/65/EU requirements. When operated inside certified incubators or environmental chambers, they support workflows aligned with ISO 13485 (medical device manufacturing) and USP analytical instrument qualification guidelines.

Software & Data Management

While standalone operation is fully functional via front-panel controls, the SSL3 and SSL4 integrate seamlessly into networked lab infrastructures through optional RS-232 or USB-to-serial adapters (sold separately). This enables remote parameter logging, audit trail generation, and synchronization with LIMS or ELN systems. All time-stamped operational data—including setpoints, actual rpm, elapsed duration, and error codes—are exportable in CSV format. Firmware supports configurable alarm thresholds and automatic shutdown upon timeout or overload detection—meeting FDA 21 CFR Part 11 requirements when deployed with appropriate electronic signature and access control layers.

Applications

• Nucleic acid purification workflows (e.g., plasmid prep, genomic DNA isolation)
• Protein transfer in electrophoresis blotting (semi-dry and wet transfer systems)
• Maintenance of mammalian and insect cell lines in T-flasks and multi-well plates
• Enzyme kinetics studies requiring uniform substrate dispersion
• Antibody labeling and conjugation reactions under controlled agitation
• Microbial growth monitoring in liquid media across antibiotic susceptibility testing

FAQ

Can the SSL3 and SSL4 be used inside CO₂ incubators?
Yes—both models are rated for continuous operation at up to 40 °C and 80% RH, making them suitable for placement inside standard humidified CO₂ incubators when configured with optional stainless-steel fasteners.
Is the tilt angle on the SSL3 truly adjustable across the full 3–12° range?
Yes—the SSL3 features a calibrated manual tilt mechanism with detented positions at 3°, 6°, 9°, and 12°, allowing users to optimize mixing efficiency for different vessel geometries and viscosities.
Does the multi-tier accessory SSM3/1 require recalibration after installation?
No—each tier is mechanically indexed and magnetically secured to maintain consistent center-of-mass alignment; no recalibration is needed between configurations.
Are replacement mats and encoder knobs available as spare parts?
Yes—Stuart supplies genuine OEM components including anti-slip silicone mats (Part No. SSMAT), encoder knobs (Part No. SKNOB), and mounting pillars (Part No. SPILLAR) with documented traceability and shelf-life certification.
What is the expected service life under continuous 24/7 operation?
Based on accelerated lifetime testing per IEC 60068-2-64, the brushless motor and bearing assembly are rated for ≥20,000 hours of uninterrupted runtime under nominal load conditions.