Thermo Scientific RT-Elite Heated Magnetic Stirrer

Overview

The Thermo Scientific RT-Elite Heated Magnetic Stirrer is an engineered solution for precise, reproducible heating and mixing in research, quality control, and production laboratories. Designed around Couette-flow magnetic stirring principles, it integrates a high-efficiency aluminum heating plate with a powerful rare-earth magnet drive system to deliver consistent torque transmission—even under viscous or dense sample conditions. Its dual-control architecture enables independent regulation of thermal and mechanical parameters without cross-interference, supporting applications ranging from buffer preparation and reagent dissolution to polymerization initiation and catalyst activation. The unit complies with IEC 61010-1:2010 safety standards for laboratory electrical equipment and meets electromagnetic compatibility (EMC) requirements per EN 61326-1:2013.

Key Features

• StirTrac™ intelligent motor control ensures stable rotational speed across the full 50–1200 rpm range, minimizing speed drift during extended operation or load variation.
• HOT TOP™ thermal monitoring activates a visual and audible alert when surface temperature exceeds 50 °C—providing early warning before operator contact or sample degradation.
• Independent adjustable overtemperature protection allows users to define a custom safety cutoff (up to 350 °C), separate from the operational setpoint, enhancing process integrity in GLP/GMP environments.
• Triple-segment LCD interface simultaneously displays real-time temperature (0.1 °C resolution), stirring speed (1 rpm increment), and elapsed/remaining time—enabling unambiguous status verification without menu navigation.
• One-knob dual-function control with tactile feedback simplifies operation; integrated lock mode prevents accidental parameter changes during active runs.
• Three programmable memory slots store frequently used temperature–speed–duration profiles, reducing setup time and minimizing human error in routine protocols.
• RS232 serial interface supports time-stamped data export (temperature, speed, runtime) to external PCs for audit-ready recordkeeping—compatible with LIMS integration and compliant with FDA 21 CFR Part 11 when paired with validated software.

Sample Compatibility & Compliance

The RT-Elite accommodates vessels up to 4 L in volume and 18 kg in total mass—including round-bottom flasks, beakers, and jacketed reactors—when placed centrally on its 13.5 cm radius aluminum heating/stirring plate. Its robust thermal uniformity (< ±5 °C across the plate at 200 °C) and high-torque coupling support low-viscosity aqueous solutions as well as moderately viscous organic media (e.g., ethylene glycol, silicone oils). The device conforms to ISO/IEC 17025 documentation requirements for equipment qualification and is routinely deployed in laboratories adhering to ASTM E2915 (standard practice for thermal stability evaluation) and USP environmental control workflows.

Software & Data Management

While the RT-Elite operates autonomously via front-panel controls, its RS232 port enables connection to host systems running terminal emulation or custom LabVIEW/Python-based acquisition scripts. Logged data includes timestamped temperature readings, RPM values, and session duration—exportable as CSV for trend analysis or inclusion in electronic batch records. When integrated into validated environments, the instrument supports ALCOA+ data integrity principles through user-accessible audit trails (via connected PC), electronic signatures, and immutable log files—facilitating regulatory submissions under EMA Annex 11 and FDA inspection readiness.

Applications

• Preparation of standardized calibration standards and reference materials requiring strict thermal and mixing consistency.
• Controlled heating and agitation during solubility studies, dissolution testing (per USP ), and extractables/leachables sample conditioning.
• Support of synthetic chemistry workflows including Grignard reactions, Suzuki couplings, and esterification where precise thermal ramping and inert-atmosphere-compatible stirring are critical.
• Cell culture media warming and homogenization prior to filtration or sterile transfer—validated for use with USP Class VI-certified containers.
• Accelerated stability testing per ICH Q1A(R2), where defined temperature–time profiles must be maintained with minimal deviation over weeks or months.

FAQ

Does the RT-Elite support external temperature probe input for PID-controlled sample temperature?
No—the RT-Elite regulates based on heating plate surface temperature only. For sample-core temperature control, an external circulator or immersion probe-equipped system is recommended.
Can the RS232 output be used for remote start/stop commands?
Yes—ASCII command protocol documentation is available under NDA for OEM integration; basic triggering and parameter readback are supported.
Is the aluminum heating plate chemically resistant to common solvents?
The anodized aluminum surface resists corrosion from water, alcohols, and dilute acids/bases; prolonged exposure to halogenated solvents or strong oxidizers is not advised.
What is the warm-up time to reach 300 °C from ambient?
Approximately 18–22 minutes under no-load conditions, depending on ambient humidity and airflow.
Does the unit include calibration certificates or traceable documentation?
Factory calibration data (as-found/as-left) is provided with each unit; NIST-traceable calibration services are available through Thermo Fisher Field Service.