IKA RET Control Magnetic Stirrer

Overview

The IKA RET Control Magnetic Stirrer is a precision-engineered benchtop laboratory instrument designed for reliable, reproducible heating and stirring of liquid samples under controlled thermal conditions. Built upon Couette flow principles, it utilizes a rotating magnetic field to drive PTFE- or glass-coated stir bars within vessels—enabling homogeneous mixing without mechanical shaft penetration. Its integrated high-performance heating plate (stainless steel 1.4301, Ø135 mm) delivers rapid thermal response (7 K/min in 1 L water) and stable temperature maintenance up to 340 °C. Engineered for unattended operation, the RET Control incorporates dual independent safety temperature circuits, electronic timer functionality (1 min to 9 h 59 min), and microprocessor-based closed-loop control architecture—ensuring compliance with fundamental requirements of GLP environments and routine QC workflows in pharmaceutical, chemical, and academic laboratories.

Key Features

• Backlit LCD display with simultaneous digital readout of setpoint and actual sample temperature (±0.5 K from ambient to 100 °C; ±1 K above 100 °C)
• Dual external temperature sensor support: configurable for either single-point (PT100) sample temperature control or dual-sensor mode (PT1000) for independent regulation of both sample and heat-transfer medium temperatures
• Three operational modes—including lockable configuration—to prevent accidental parameter modification during extended experiments
• Intelligent stir bar detection system that identifies magnetic stirrer breakage or demagnetization in real time
• Two independently adjustable safety temperature circuits (range: 50–350 °C), each programmable to halt heating if exceeded
• HOT indicator remains illuminated after power-off to warn users of residual plate surface temperature
• RS 232 interface and analog output enable integration into centralized lab monitoring systems and data acquisition platforms
• Labworldsoft® software compatibility for remote control, automated parameter logging, and audit-trail generation compliant with FDA 21 CFR Part 11 requirements
• IP 42-rated sealed housing ensures resistance to dust ingress and vertical dripping water—enhancing durability in demanding multi-user lab settings

Sample Compatibility & Compliance

The RET Control accommodates standard laboratory glassware including beakers, flasks, and reaction vessels up to 20 L capacity (water-equivalent). Its stainless steel heating surface supports borosilicate glass, ceramic, and metal containers compatible with temperatures up to 340 °C. The instrument meets DIN EN 60529 (IP 42), EN 61010-1 (Safety Requirements for Electrical Equipment for Measurement, Control, and Laboratory Use), and conforms to electromagnetic compatibility standards per EN 61326-1. When operated with validated PT100 sensors and Labworldsoft® configuration, it supports traceable temperature recording suitable for ISO/IEC 17025-accredited testing laboratories and GMP-aligned process development studies.

Software & Data Management

Via its RS 232 port, the RET Control interfaces seamlessly with IKA’s Labworldsoft® software—a Windows-based application supporting real-time parameter visualization, scheduled start/stop sequences, and time-stamped export of temperature and speed profiles in CSV or XML format. All user actions—including setpoint changes, timer activation, and safety limit adjustments—are logged with timestamps and operator IDs, satisfying documentation requirements for 21 CFR Part 11 electronic records. Analog output (0–10 V) allows connection to PLCs or chart recorders for continuous analog signal capture in legacy infrastructure environments.

Applications

• Controlled solubility and dissolution testing in pharmaceutical formulation development
• Homogenization of polymer solutions, colloidal suspensions, and viscous reagents prior to spectroscopic or rheological analysis
• Temperature-dependent kinetic studies requiring precise thermal ramping and sustained isothermal conditions
• Preparation of calibration standards and reference materials under documented thermal history
• Heating and agitation of samples for wet digestion protocols in environmental and food safety laboratories
• Supporting ASTM D2196 (viscosity of non-Newtonian materials) and ISO 3219 (rheological testing) sample conditioning steps

FAQ

What is the maximum recommended vessel diameter for optimal stirring performance?
For uniform torque transmission and vortex stability, use vessels with internal diameters ≤120 mm when operating at speeds >800 rpm.
Can the RET Control maintain temperature stability during prolonged overnight runs?
Yes—the dual safety circuits, PID-controlled heating algorithm, and thermal mass of the stainless steel plate ensure drift <±1.5 K over 12-hour cycles at setpoints ≤250 °C.
Is calibration of the built-in temperature sensor required before use?
The unit ships with factory calibration; however, periodic verification against a NIST-traceable reference thermometer is recommended per ISO/IEC 17025 clause 6.6.
Does the instrument support external temperature feedback from third-party probes?
Only IKA-certified PT100 or PT1000 sensors are supported; non-IKA probes may compromise accuracy and void warranty coverage.
How does the stir bar breakage detection function operate?
The system monitors magnetic coupling efficiency via current draw analysis on the drive coil; loss of synchronization triggers an audible alert and halts rotation while preserving temperature setpoint.