IKA RET control-visc white Heating Magnetic Stirrer

Overview

The IKA RET control-visc white is a high-precision, integrated heating magnetic stirrer engineered for demanding laboratory applications requiring simultaneous temperature control, real-time torque-based viscosity monitoring, and mass measurement. Unlike conventional stirrers, it implements a dual-sensor thermal architecture—supporting both integrated hotplate temperature regulation and external PT100 probe feedback—for closed-loop sample temperature control with ±0.2 K accuracy. Its ceramic-coated aluminum heating plate delivers rapid thermal response (up to 7 K/min in 1 L water) and sustained operation up to 340 °C, while the built-in analytical weighing system (0–5000 g, resolution ±1 g below 50 g) enables direct mass tracking during dissolution, reaction monitoring, or gravimetric dosing protocols. Designed for unattended operation, the unit complies with IP42 environmental protection standards and features fail-safe thermal cutoffs, stir bar ejection detection, and audit-ready parameter locking—making it suitable for GLP-compliant workflows and ISO 17025-accredited laboratories.

Key Features

• Integrated high-resolution weighing system (0–5000 g) with BNC interface for pH electrode integration
• TFT touchscreen display supporting English, German, French, Spanish, Chinese, and other languages
• Dual-mode temperature control: “Rapid Heating” and “Precision Regulation”, each with independent setpoint and ramp profiles
• Simultaneous dual-temperature monitoring via optional external PT100 probe (sample) and internal hotplate sensor (heating medium)
• Real-time torque trend analysis for indirect viscosity estimation and process endpoint detection
• Programmable timer and countdown functions with audible/visual alerts
• Stir bar detection algorithm prevents dry-run damage and ensures consistent mixing efficiency
• Keypad lock function prevents inadvertent parameter changes during extended runs
• Post-shutdown residual heat display: screen remains active until plate cools below 50 °C
• RS232 and USB ports support remote command execution (SCPI protocol), data logging, and firmware updates

Sample Compatibility & Compliance

The RET control-visc white accommodates standard laboratory glassware (e.g., beakers, flasks, crystallization dishes) up to 20 L volume with stir bars up to 80 mm in length. Its 135 mm diameter enamel-coated ceramic plate ensures uniform heat distribution and chemical resistance against common solvents and reagents. The device meets DIN EN 60529 (IP42) for protection against solid objects ≥1 mm and vertically falling water droplets—suitable for general lab environments with controlled humidity (<80 % RH) and ambient temperatures between 5–40 °C. It is CE-marked per Directive 2014/30/EU (EMC) and 2014/35/EU (LVD), and its digital parameter storage, locked configuration mode, and timestamped error codes support traceability requirements under ISO/IEC 17025:2017 Clause 7.7 and FDA 21 CFR Part 11–aligned documentation practices when used with validated software interfaces.

Software & Data Management

Via USB or RS232, the instrument communicates using standard SCPI commands, enabling integration into LabVIEW, MATLAB, or custom Python-based automation frameworks. Exported datasets include time-stamped records of speed, plate temperature, measured sample temperature (if PT100 connected), torque values, weight readings, and error flags. Firmware updates are performed securely through signed USB packages. All user-modifiable parameters—including safety limits, language selection, and default startup configurations—are stored in non-volatile memory with write-protection logic. Audit trails are implicitly supported through sequential error code logging (e.g., “E07: Overtemperature”, “E12: Stir bar lost”) and persistent display of last-set safety thresholds.

Applications

• Controlled dissolution testing in pharmaceutical development (USP , )
• Temperature-dependent polymer solubilization and crosslinking studies
• Inorganic synthesis requiring precise thermal ramping and stoichiometric mass addition
• Calibration of viscometers using Newtonian reference fluids under thermostatic conditions
• Environmental sample preparation (e.g., TKN digestion, heavy metal leaching) with mass-normalized reagent addition
• Electrochemical cell conditioning where pH stabilization and thermal equilibration are concurrent requirements
• Quality control of adhesives, coatings, and suspensions via real-time torque profiling

FAQ

Can the RET control-visc white operate without an external temperature probe?
Yes—the unit defaults to hotplate surface temperature control. However, for accurate sample temperature regulation, especially in low-thermal-conductivity media or tall vessels, a PT100 probe is strongly recommended.
Is the weighing function calibrated internally or does it require external verification?
The scale performs automatic zero-point calibration on power-up. Full calibration requires traceable weights per ISO/IEC 17025 procedures; calibration certificates are available upon request from IKA service centers.
What happens if the stir bar jumps or becomes misaligned during operation?
The motor current signature is continuously analyzed; detection triggers immediate speed reduction, visual alert, and suspension of heating until manual reset.
Does the USB interface support mass storage mode for direct data download?
No—it operates exclusively as a virtual COM port. Data export requires host-side software or terminal emulation (e.g., Tera Term) configured for ASCII-based SCPI responses.
How is compliance with 21 CFR Part 11 addressed?
While the hardware itself does not provide electronic signatures or role-based access, its parameter locking, error logging, and deterministic communication protocol enable validation within a broader Part 11–compliant LIMS or ELN ecosystem.