IKA RCT digital Magnetic Stirrer

Overview

The IKA RCT digital is a high-precision, benchtop magnetic stirrer with integrated heating and intelligent thermal management—engineered for reproducible mixing and temperature-controlled reaction workflows in academic, pharmaceutical, and industrial laboratories. Unlike conventional stirrers relying on basic resistive heating and open-loop speed control, the RCT digital employs a robust aluminum alloy heating plate coupled with a high-flux AlNiCo permanent magnet system, enabling stable torque delivery across its full 50–1500 rpm range—even under viscous or high-volume conditions (up to 20 L H₂O). Its core architecture integrates SmartTemp® technology, which continuously monitors both plate surface temperature and medium temperature (via optional external probes), dynamically adjusting power output to minimize thermal overshoot and ensure ±0.2 K stability when used with the ETS-D6 sensor. This closed-loop thermal regulation meets critical requirements for kinetic studies, dissolution testing, and GLP-compliant sample preparation where thermal drift directly impacts assay validity.

Key Features

• Aluminum alloy heating plate (Ø135 mm) with chemically resistant, safety-rated tempered glass surface—resistant to strong acids, bases, and organic solvents per DIN ISO 17761.
• AlNiCo magnet system delivering high magnetic flux density and consistent coupling up to 80 mm stir bars, minimizing decoupling risk during high-viscosity or exothermic reactions.
• Dual-display LCD interface showing real-time setpoint and actual values for both speed (±10 rpm resolution) and temperature (1 K resolution), with intuitive rotary knob control for rapid parameter adjustment.
• Programmable safety temperature circuit (adjustable 50–370 °C) with automatic shutdown and error code generation (e.g., Error 5 for probe disconnection or medium overheating).
• Automatic reverse rotation and intermittent stirring modes support heterogeneous suspension maintenance and gas-liquid mass transfer optimization.
• Firmware-upgradable via USB or RS232—ensuring long-term compliance with evolving lab informatics standards and future feature integration without hardware replacement.
• Compliant with IEC 61010-1 (Safety Requirements for Electrical Equipment for Measurement, Control, and Laboratory Use) and certified to EN 61326-1 (EMC for laboratory equipment).

Sample Compatibility & Compliance

The RCT digital accommodates standard laboratory vessels—including borosilicate glass beakers (up to 3 L), stainless steel reactors, and PTFE-coated containers—within its 20 L water-equivalent capacity. Its non-porous tempered glass surface prevents chemical ingress and supports routine autoclaving-compatible cleaning protocols. For regulated environments, the device supports external PT1000, ETS-D5, and ETS-D6 temperature sensors, enabling traceable, medium-in situ thermal monitoring aligned with USP , ISO 17025, and FDA 21 CFR Part 11 data integrity expectations when paired with validated LIMS or ELN systems. The adjustable safety limit circuit satisfies internal SOPs requiring dual-point thermal oversight (plate + medium), while IP42 ingress protection ensures operational reliability in humid or splash-prone QC labs.

Software & Data Management

While the RCT digital operates as a standalone instrument, its RS232 and USB interfaces enable bidirectional communication with third-party lab software (e.g., LabVIEW, MATLAB, or custom Python scripts) for automated parameter logging, remote start/stop commands, and time-stamped event capture. All temperature and speed setpoints, safety limits, and error events are timestamped and stored in non-volatile memory—supporting audit-ready documentation for GMP/GLP audits. Firmware updates preserve calibration constants and maintain traceability per ISO/IEC 17025 Clause 5.6; no recalibration is required post-update. The absence of analog outputs or embedded graphing functions reflects IKA’s design philosophy: prioritizing deterministic control and interoperability over proprietary visualization layers.

Applications

• Kinetic studies requiring precise thermal ramping (7 K/min in 1 L H₂O) and simultaneous agitation—such as enzyme-catalyzed hydrolysis or polymerization initiation.
• Pharmaceutical dissolution testing (USP Apparatus II) using standardized 600 mL beakers and 40 mm stir bars, with ETS-D6 feedback ensuring ±0.2 K bath temperature control.
• Inorganic synthesis involving reflux conditions up to 310 °C, where aluminum plate uniformity and AlNiCo torque retention prevent boil-over or localized hot-spot degradation.
• Environmental sample digestion (EPA Method 3050B) requiring controlled acid heating and continuous mixing of sediment slurries.
• QC/QA workflows in food and cosmetics labs where repeatable viscosity-independent mixing (validated at 50 rpm and 1500 rpm) ensures homogeneity prior to spectrophotometric or titrimetric analysis.

FAQ

Does the RCT digital support external temperature feedback for closed-loop medium control?
Yes—it accepts PT1000, ETS-D5, and ETS-D6 probes, achieving ±0.2 K accuracy at 50 °C in standardized 600 mL beaker configurations.
What is the warranty coverage for the RCT digital?
IKA provides a lifetime limited warranty on the RCT digital unit, covering defects in materials and workmanship under normal laboratory use—subject to registration and adherence to maintenance guidelines.
Can the RCT digital operate safely in high-humidity environments?
Rated IP42 per DIN EN 60529, it is protected against vertically falling drops and solid objects >1 mm—suitable for ambient humidity ≤80 % RH at 5–40 °C.
Is firmware update capability available without additional hardware?
Yes—updates are delivered via USB flash drive or RS232 connection using IKA’s publicly available Labworldsoft utility; no dongle or subscription is required.
How does SmartTemp® differ from conventional heating control?
SmartTemp® continuously compares plate surface temperature (measured by embedded thermistor) and medium temperature (from external probe), dynamically modulating power to suppress thermal lag and overshoot—unlike fixed-duty-cycle or PID-only controllers.