Stacked Shaker Incubator

Theory and Method

Stackable Independent Shaking Incubator Architecture The ToronShake™ ST-S Series is built around a modular stacking architecture in which each unit functions as a fully independent incubator shaker with its own sealed working chamber, independent BRIGHT II control system, individual temperature and shaking setpoints, and separate data management. Units are mechanically stacked and secured on a shared structural frame mounted on a mobile caster base allowing the stack to be repositioned as a single assembly within the laboratory while each unit maintains completely independent operation.

This independence is the defining operational advantage of the stacked shaker incubator format over a single large-volume horizontal shaker: multiple protocols at different temperatures, speeds, and program states can run simultaneously within the same floor footprint, without one unit's door-opening event or setpoint change affecting adjacent units in the stack.

Three Selectable Rotation Modes The ToronShake™ ST-S provides three selectable orbital rotation modes, allowing operators to match the agitation pattern to the specific requirements of their culture vessel type, sample viscosity, and protocol. The rotation rate range is 20–350 rpm across standard shelf positions, with the top-position tray limited to 20–300 rpm to account for the mechanical dynamics of the uppermost position in a stacked configuration. Rotation accuracy is maintained at ±1 rpm across all modes and speed settings. The Ø26 mm vibration amplitude delivers consistent orbital fluid motion across all flask sizes from 250 mL to 5,000 mL.

BRIGHT II Intelligent Temperature Control Temperature is governed by the BRIGHT II intelligent operating system an upgrade from the BRIGHT I platform used in other ToronShake™ series which continuously monitors the internal chamber sensor and modulates output from the heating and refrigeration systems to maintain the programmed setpoint. BRIGHT II automatically compensates control parameter values in response to real-time ambient environmental changes, maintaining setpoint accuracy without manual recalibration when laboratory conditions shift. Temperature resolution is 0.1 °C, with fluctuation held to ±0.3 °C and spatial uniformity within ±0.6 °C, both measured at 37 °C tighter uniformity than the horizontal shaker incubator platform, reflecting the compact working volume of each individual stacked unit.

Compressor Refrigeration (ToronShake™ ST-2S and ToronShake™ ST-1S) The ToronShake™ ST-2S and ToronShake™ ST-1S sub-series incorporate compressor refrigeration that extends temperature control from 4 °C enabling sub-ambient shaking incubation protocols in a stacked format. Each unit in a mixed stack can operate at a different temperature setpoint independently, making it possible to run both ambient-temperature and refrigerated protocols simultaneously within a single stacked lab shaker incubator assembly.

Humidity Control with Built-In Humidification Tray (ToronShake™ ST-1S) The ToronShake™ ST-1S configuration adds humidity control from ambient levels up to 95% RH with fluctuation maintained within ±5% RH. A built-in humidification tray generates moisture passively within the working chamber supporting protocols where evaporative loss from culture vessels over extended shaking incubation runs would alter media concentration or osmolality. The SUS 304 stainless steel waterproof interior construction accommodates the moisture conditions associated with high-humidity operation without corrosion or cleaning difficulty.

UV Germicidal Sterilization and Standard Lighting Every unit in the ToronShake™ ST-S Series is equipped as standard with both interior illumination lighting and a UV germicidal lamp. UV sterilization supports timed inter-run decontamination of the working chamber interior reducing microbial load on interior surfaces between culture runs without liquid chemical disinfectants. The one-piece toughened glass panel and viewing window allow sample observation without opening the chamber during active incubation and UV cycles. The flip-open door design with movable shaking board supports straightforward sample access and chamber cleaning between runs.

Programmable Multi-Segment Profiles with Reservation Scheduling The BRIGHT II platform on each unit supports 5 independent program slots, each with up to 30 configurable segments across 99 repeatable cycles providing flexible protocol design for ramp-and-soak sequences, step-change temperature profiles, and multi-phase shaking incubation programs that run automatically without operator intervention. The reservation function allows delayed-start scheduling, and the screen saver with access control prevents accidental parameter changes during unattended operation in shared laboratory environments.

Data Management and Access Control Operational events on each individual unit are recorded continuously in onboard memory supporting 150,000 data records. Real-time curves, historical data, and event logs are viewable directly on the 7-inch touch screen. USB export transfers complete timestamped data files for documentation, audit trail, and compliance purposes. Multi-level permission management restricts parameter access across each unit independently supporting individual user accountability in shared or regulated laboratory shaker incubator environments.