LAUDA ECO RE 630 S Refrigerated Circulating Bath with External Loop

Overview

The LAUDA ECO RE 630 S is a high-precision refrigerated circulating bath engineered for demanding laboratory applications requiring stable thermal control across an exceptionally wide temperature range—from −30 °C to +200 °C. Designed and manufactured in Germany, it integrates a compact stainless steel bath reservoir (5.7 L nominal capacity) with a fully integrated cooling system and a variable-speed circulation pump (Vario pump), enabling both internal bath homogenization and external temperature regulation of analytical instruments, reactors, or material test fixtures. Its operation is based on closed-loop liquid thermoregulation using heat exchange between the bath fluid (e.g., water, silicone oil, or specialized heat transfer fluids) and a dual-mode (heating/cooling) thermal management system. The device employs a full electronic PID controller with adaptive tuning, ensuring reproducible setpoint accuracy and long-term stability of ±0.02 °C under steady-state conditions—critical for kinetic studies, calibration traceability, and ISO/IEC 17025-compliant testing environments.

Key Features

• LAUDA SmartCool intelligent cooling system: dynamically modulates compressor output and fan speed based on real-time thermal load, minimizing energy consumption and extending component service life
• Vario pump with six adjustable flow stages: delivers up to 22 L/min at 0.6 bar, supporting both low-flow precision applications and high-capacity external loops
• LAUDA Silver immersion thermostat with monochrome graphical LCD: displays simultaneous setpoint and actual temperature, with intuitive soft-key navigation and cursor-based parameter entry
• Integrated programmable controller: supports one multi-segment temperature profile (up to 20 steps) for automated ramp-hold-cool sequences
• Safety-certified Class III design: approved for use with flammable and non-flammable heat transfer media; includes configurable overtemperature protection (Tmax) and hardware-independent thermal cutoffs
• Modular interface architecture: standard USB port; optional upgrade paths include analog I/O (0–10 V / 4–20 mA), digital contact modules, RS-232/485, PROFIBUS-DP, Ethernet/USB gateway, and Pt100/LiBus external sensor integration
• Ergonomic stainless steel bath: 150 × 130 × 160 mm internal dimensions, 140 mm usable depth, rear-mounted drain valve, and included insulated bath cover
• Natural refrigerant compatibility: R-134a (GWP 1430) used in compliance with EU F-Gas Regulation (EC) No. 517/2014; future-ready design accommodates next-generation low-GWP alternatives

Sample Compatibility & Compliance

The RE 630 S is compatible with a broad spectrum of heat transfer media—including deionized water, ethylene glycol/water mixtures, silicone oils (e.g., DC200 series), and specialty fluorinated fluids—enabling safe operation from cryogenic to high-temperature regimes. Its Class III safety rating per DIN EN 61010-1 permits use with flammable liquids (e.g., ethanol, acetone) when configured with appropriate ventilation and containment protocols. The unit complies with electromagnetic compatibility (EMC) standards per EN 61326-1 and carries CE marking for the European Economic Area. For regulated laboratories, its programmable logic, audit-trail-capable USB logging (via optional software), and deterministic PID response support alignment with GLP, GMP, and FDA 21 CFR Part 11 requirements when deployed with validated data acquisition workflows.

Software & Data Management

While the RE 630 S operates autonomously via its embedded Silver controller, it supports external data acquisition and remote supervision through its standard USB interface. LAUDA’s proprietary software suite—LAUDA Pegasus—enables real-time monitoring, profile editing, event logging, and export of timestamped temperature/flow datasets in CSV format. When equipped with the optional Ethernet or RS-485 module, the device integrates into centralized lab infrastructure via Modbus RTU or TCP/IP protocols, allowing synchronization with LIMS, SCADA, or MES platforms. All firmware updates are delivered via signed binary packages to ensure integrity; configuration backups and restore functions are accessible via USB mass storage mode.

Applications

• Calibration of temperature-sensitive instrumentation (e.g., DSC, TGA, viscometers, spectrophotometers)
• Thermal conditioning of optical cells, cuvettes, and flow-through detectors in HPLC and UV-Vis systems
• Stabilization of laser diodes, photomultiplier tubes, and other optoelectronic components
• Controlled-rate heating/cooling in polymer crystallization, phase transition, and rheological characterization studies
• External jacket temperature control for benchtop reactors, bioreactors, and electrochemical cells
• Material testing per ASTM D3418 (DSC), ISO 11357 (thermal analysis), and USP (thermometric titration)

FAQ

What is the minimum and maximum recommended fill volume for the bath?

The stainless steel reservoir requires a minimum fill volume of 4.6 L to ensure proper sensor immersion and pump priming; the maximum operational volume is 5.7 L.
Can the RE 630 S operate continuously at 200 °C while maintaining ±0.02 °C stability?

Yes—provided ambient conditions remain within 5–40 °C and a suitable high-temperature fluid (e.g., silicone oil) is used, the system achieves specified stability across its full range under steady-state load.
Is external temperature feedback supported?

Yes—via optional Pt100/LiBus module, enabling cascade control using an external probe placed in the sample or process stream.
Does the unit meet requirements for ISO/IEC 17025-accredited laboratories?

The RE 630 S provides metrologically traceable thermal performance; users must validate installation, operation, and performance (IQ/OQ/PQ) per their quality management system, including periodic verification against NIST-traceable references.
How is maintenance performed on the cooling system?

The air-cooled condenser requires periodic cleaning of dust filters; refrigerant circuits are sealed-for-life and serviced only by authorized LAUDA technicians using certified recovery equipment.