IKA RET control-visc white Magnetic Stirrer with Integrated Precision Weighing and Temperature Control

Overview

The IKA RET control-visc white is a high-integration magnetic stirrer engineered for precision laboratory workflows requiring concurrent stirring, heating, real-time weighing, and temperature-controlled reaction monitoring. Unlike conventional magnetic stirrers, this instrument implements a dual-sensor thermal architecture—supporting both external PT100 probe feedback (sample or bath temperature) and internal ceramic plate thermometry—enabling closed-loop temperature regulation with ±0.2 K accuracy under controlled conditions. Its core measurement principle relies on electromagnetic induction for rotational actuation of PTFE- or glass-coated stir bars, combined with load-cell-based mass sensing (0–5 kg range) and digital torque estimation derived from motor current draw and speed feedback. Designed for unattended operation in QC labs, R&D synthesis setups, and teaching environments, the device meets stringent requirements for traceability, reproducibility, and operational safety—particularly where thermal stability, stoichiometric dosing, or viscosity-sensitive mixing protocols are critical.

Key Features

• Integrated high-precision weighing system (0–5000 g; ±1 g up to 500 g, ±5 g above) enables real-time mass monitoring during reagent addition or solvent evaporation
• TFT touchscreen interface with configurable language support (English, German, French, Spanish, Chinese, Japanese) and intuitive parameter navigation
• Dual-mode temperature control: “Rapid Heat” (optimized for fast ramp-up) and “Precise Hold” (minimizes overshoot via PID tuning with PT100 input)
• Simultaneous dual-point temperature monitoring: independent readings from integrated plate sensor and optional external PT100 probe
• Stir bar deviation detection algorithm prevents inefficient mixing or mechanical damage due to misaligned or oversized stir bars (max. length: 80 mm)
• Real-time torque trend visualization provides indirect insight into viscosity changes during polymerization, dissolution, or emulsification processes
• Programmable timer and countdown functions support standardized SOP execution and batch repeatability
• Lock key functionality prevents accidental parameter modification during active runs—essential for GLP-compliant environments
• Transparent polycarbonate safety shield included as standard, meeting lab safety best practices for hot surface containment
• Post-shutdown thermal hold display: screen continues showing actual plate temperature until it drops below 50 °C, supporting safe handling protocols

Sample Compatibility & Compliance

The RET control-visc white accommodates vessels up to 20 L (water-equivalent volume) using standard round-bottom flasks, beakers, or jacketed reactors compatible with magnetic coupling. Its enamel-coated aluminum heating plate (Ø135 mm) supports borosilicate glass, stainless steel, and ceramic containers; maximum medium temperature is 265 °C depending on vessel geometry and thermal mass. The unit complies with DIN EN 60529 (IP42 ingress protection), CE marking directives, and RoHS material restrictions. While not certified for FDA 21 CFR Part 11 out-of-the-box, audit-ready data logs (via USB export) and parameter lock features facilitate alignment with GLP/GMP documentation standards when integrated into validated laboratory systems.

Software & Data Management

Data acquisition and remote operation are supported through native RS232 and USB-B interfaces. IKA Labworldsoft™ (v5.0+) enables full parameter scripting—including speed ramps, temperature profiles, timer triggers, and weight-triggered events—as well as time-stamped export of torque, temperature, speed, and mass datasets in CSV format. Firmware updates are performed exclusively via USB, ensuring version control and traceability. All displayed values—including setpoints, actuals, error codes (e.g., E12 = overtemperature, E23 = stir bar stall), and safety limits—are digitally rendered with 0.1 K and 1 rpm resolution, minimizing parallax or interpretation errors common with analog dials.

Applications

This instrument serves diverse applications across pharmaceutical development (e.g., dissolution testing under USP , buffer preparation with mass-based titration), chemical synthesis (Grignard reactions requiring strict anhydrous heating control), materials science (nanoparticle dispersion kinetics monitored via torque drift), food quality assurance (viscosity tracking during starch gelatinization), and academic teaching labs emphasizing metrology-aware experimental design. Its ability to correlate mass loss (evaporation), temperature trajectory, and mechanical resistance (torque) makes it especially valuable for kinetic studies where multiple process variables must be co-monitored without external instrumentation.

FAQ

Does the RET control-visc white support external PT100 probes for sample temperature feedback?
Yes—via a dedicated BNC connector, enabling direct integration with standard PT100 sensors for accurate sample-core temperature regulation.
Can the weighing function be used simultaneously with heating and stirring?
Yes—the load cell operates independently of thermal expansion effects due to internal compensation algorithms; however, optimal accuracy is achieved within ambient-to-150 °C plate temperature ranges.
Is the USB interface capable of real-time data streaming during operation?
No—USB supports only batch export of logged data post-run and firmware updates; RS232 is required for live command-and-control integration.
What is the purpose of the “intermittent operation” mode?
It cycles stirring ON/OFF at user-defined intervals (e.g., 30 s ON / 90 s OFF), useful for heat-sensitive reactions or sedimentation studies requiring periodic agitation.
How does the stir bar detection system work?
It analyzes motor current harmonics and rotational consistency in real time; deviations beyond calibrated thresholds trigger visual alerts and optional automatic speed reduction.