IKA RET Control Heating Magnetic Stirrer
| Brand | IKA |
|---|---|
| Origin | Germany |
| Model | RET |
| Stirring Volume | 20 L |
| Heating Rate | 7 °C/min |
| Speed Range | 50–1,500 rpm |
| Temperature Range | Ambient to 310 °C |
| Max Stir Bar Size (L × Ø) | 80 × 10 mm |
| Setpoint Accuracy | ±0.5 °C (<100 °C), ±1.0 °C (>100 °C) |
| Adjustable Safety Limit | 50–350 °C |
Overview
The IKA RET Control is a high-performance heating magnetic stirrer engineered for precision temperature-controlled mixing in research laboratories, quality control environments, and industrial R&D settings. Utilizing a robust permanent magnet drive system coupled with a ceramic-coated aluminum heating plate, the RET Control delivers uniform thermal distribution and stable rotational torque across its full speed and temperature operating envelope. Its design adheres to fundamental principles of convective heat transfer and magnetic coupling efficiency—ensuring consistent fluid dynamics even at elevated viscosities and extended runtimes. Unlike basic stirrers, the RET Control integrates closed-loop PID temperature regulation with real-time motor feedback, enabling reproducible thermal ramping and sustained isothermal conditions critical for reaction kinetics studies, dissolution testing, and sample homogenization protocols.
Key Features
- High-power ceramic heating plate with rapid thermal response (7 °C/min heating rate) and precise digital PID control
- Brushless DC motor delivering continuous torque from 50 to 1,500 rpm, optimized for both low-viscosity solvents and moderately viscous media
- Dual-sensor architecture: independent PT100 temperature sensor for plate surface monitoring and integrated ambient reference for enhanced stability
- Adjustable safety limit function (50–350 °C) with automatic thermal cutoff—compliant with IEC 61000-4-3 for electromagnetic immunity and IEC 61010-1 for laboratory equipment safety
- Large, chemically resistant ceramic top plate (Ø 135 mm) supporting vessels up to 20 L capacity with optimal heat transfer geometry
- Intuitive rotary encoder interface with LED display showing simultaneous setpoint and actual values for both speed and temperature
Sample Compatibility & Compliance
The RET Control accommodates standard laboratory glassware including round-bottom flasks, beakers, and jacketed reactors up to 20 L volume. It supports stir bars up to 80 × 10 mm (L × Ø), enabling effective agitation in tall-form or narrow-necked vessels. The unit meets EN 61326-1 for electromagnetic compatibility in laboratory environments and conforms to DIN EN ISO/IEC 17025 requirements for equipment used in accredited testing laboratories. Its temperature accuracy specification (±0.5 °C below 100 °C; ±1.0 °C above) aligns with routine calibration practices per ASTM E2251 and supports traceable documentation under GLP and GMP frameworks where thermal consistency is auditable.
Software & Data Management
While the RET Control operates as a standalone instrument, it supports optional analog output (0–10 V) for external data logging via compatible DAQ systems. The front-panel interface retains last-used parameters after power cycling, minimizing setup time between experiments. For laboratories requiring electronic record integrity, the device’s fixed-setpoint operation and manual adjustment workflow are compatible with 21 CFR Part 11–aligned SOPs when paired with validated logging software. No proprietary cloud connectivity or firmware updates are implemented—ensuring long-term operational predictability and reducing cybersecurity exposure in regulated environments.
Applications
- Controlled-temperature synthesis reactions requiring precise thermal ramping and sustained stirring (e.g., esterification, polymerization initiations)
- Dissolution testing per USP <711> and Ph. Eur. 2.9.3, particularly for poorly soluble APIs where mechanical agitation uniformity affects release profiles
- Preparation of homogeneous calibration standards and reference materials across analytical chemistry workflows
- Viscosity-dependent mixing validation in formulation development, especially for emulsions and suspensions
- Heating and stirring during gravimetric analysis, ash content determination, and solvent evaporation protocols
FAQ
What is the maximum recommended vessel size for optimal thermal and mechanical performance?
The RET Control is calibrated and validated for use with vessels up to 20 L; however, optimal heat transfer and stirring efficiency are achieved with vessels occupying 30–70% of the plate surface area (typically 1–5 L for standard round-bottom flasks).
Can the RET Control be used with corrosive or halogenated solvents?
Yes—the ceramic-coated heating plate and sealed electronics housing provide resistance to common organic solvents and mild acids; however, direct contact with concentrated hydrohalic acids (e.g., HCl, HF) or molten alkali metals is not advised.
Is calibration documentation available for ISO/IEC 17025 compliance?
IKA provides factory calibration certificates upon request; users may perform in-house verification using NIST-traceable thermometers and tachometers per internal SOPs.
Does the unit support external temperature probe input for solution-phase monitoring?
No—the RET Control regulates based on plate surface temperature only; for solution-specific control, an external thermostat or hybrid setup with a separate immersion probe is required.
How is overtemperature protection implemented?
A redundant bimetallic thermal cutoff engages independently of the main PID controller if plate temperature exceeds the user-defined safety limit (50–350 °C), ensuring fail-safe shutdown without software dependency.
