IKA RCT Basic / RCT Safety Digital Hotplate Stirrer

Overview

The IKA RCT Basic and RCT Safety are precision-engineered digital hotplate stirrers designed for robust, reproducible heating and magnetic stirring in academic, pharmaceutical, and industrial laboratory environments. Based on the Couette flow principle, these units employ a permanent magnet rotor driven by a brushless DC motor to rotate magnetic stir bars within vessels placed on a thermally uniform aluminum alloy heating plate. The integrated PID temperature control system—combined with either internal resistance sensing or external PT1000 probe feedback—ensures stable thermal regulation across the full 50–310 °C operating range. Unlike analog predecessors, the RCT series features dual-mode temperature control: direct plate surface regulation and precise medium-temperature tracking via external sensor input (DIN 12878 compliant), enabling compliance with method-critical workflows requiring traceable thermal profiles.

Key Features

• Brushless DC motor delivering consistent torque up to 1500 rpm with ≤5% speed deviation at rated load (20 L H₂O)
• Dual independent safety systems: programmable overtemperature cutoff (50–360 °C adjustable) and real-time hotplate surface warning indicator (visual + audible alert)
• High-density anodized aluminum heating plate (Ø135 mm) offering rapid thermal response—6.5 K/min heating rate for 1 L H₂O in standard H15 vessel
• LED digital display showing simultaneous real-time values for setpoint and actual speed and temperature
• Comprehensive error diagnostics with numeric fault codes for rapid troubleshooting and GLP-aligned maintenance logging
• IP42 ingress protection rating ensures operational reliability in humid or splash-prone lab settings
• Included PT1000.60 temperature probe (class A accuracy) and H100 protective film for extended plate longevity

Sample Compatibility & Compliance

The RCT Basic/Safety supports glass, stainless steel, and PTFE-coated reaction vessels up to 20 L capacity when using appropriately sized stir bars (e.g., IKAFLON® 40). Its DIN 12878 interface enables integration with external temperature controllers (e.g., ETS-D5) for ISO/IEC 17025-compliant calibration workflows. The unit meets EN 61010-1:2010 safety standards for electrical equipment used in laboratories and conforms to electromagnetic compatibility requirements per EN 61326-1:2013. While not inherently 21 CFR Part 11–compliant, its deterministic error reporting, non-volatile parameter storage, and physical lockout capability support audit-ready operation under GMP/GLP frameworks when paired with documented SOPs.

Software & Data Management

The RCT series operates as a standalone instrument without proprietary software dependency. All parameters—including speed setpoint, temperature setpoint, safety cutoff value, and sensor mode—are retained in non-volatile memory after power cycling. The LED interface provides immediate visual confirmation of operational status, eliminating ambiguity during unattended runs. For laboratories requiring electronic record retention, optional RS232 or USB-to-serial adapters (sold separately) enable connection to validated data acquisition systems compliant with FDA 21 CFR Part 11 Annex 11 requirements, provided appropriate audit trail configuration is implemented at the host system level.

Applications

• Controlled synthesis reactions requiring precise thermal ramping and homogeneous mixing (e.g., polymerization, condensation, hydrolysis)
• Buffer and reagent preparation in QC/QA labs where temperature consistency directly impacts assay validity
• Accelerated stability testing per ICH Q1 guidelines, leveraging dual-sensor mode for chamber-independent medium temperature validation
• Preparative chromatography mobile phase conditioning under inert atmosphere (when used with sealed vessels and compatible stir bars)
• Calibration of viscosity standards using standardized geometries and ASTM D2196-compliant protocols
• Cell culture media warming with strict avoidance of localized overheating (enabled by uniform plate thermal distribution and ±1 K control accuracy)

FAQ

Does the RCT Basic include a temperature probe?
Yes—the unit ships with a calibrated PT1000.60 sensor (class A tolerance) for external medium temperature monitoring.
Can the RCT operate unattended overnight?
Yes, provided the safety temperature limit is correctly configured and the application falls within the specified environmental conditions (5–40 °C ambient, ≤80% RH).
What is the difference between RCT Basic and RCT Safety models?
The RCT Safety includes enhanced firmware-level safeguards including automatic shutdown upon exceeding user-defined thermal thresholds and visual/audible high-temperature alerts; both share identical mechanical and electrical specifications.
Is the heating plate compatible with corrosive solvents?
The anodized aluminum surface resists mild aqueous and organic media; however, prolonged exposure to strong acids, halogenated solvents, or alkalis requires use of the included H100 protective film or alternative inert plate covers.
How is traceability maintained for temperature calibration?
The DIN 12878 interface allows connection to NIST-traceable reference thermometers; calibration certificates may be generated per ISO/IEC 17025 using third-party accredited service providers.