LAUDA ECO RE 415 S Refrigerated Circulating Bath with External Loop

Overview

The LAUDA ECO RE 415 S is a compact, high-precision refrigerated circulating bath engineered for stable thermal control in laboratory and pilot-scale applications requiring both heating and active cooling. Utilizing a dual-mode thermoelectric and compressor-based cooling architecture integrated with a robust resistive heating system, the RE 415 S maintains setpoint accuracy across an exceptionally wide operational range of −15 °C to +200 °C. Its core design adheres to the principles of dynamic thermal equilibrium—achieving ±0.02 °C temperature stability through a full-electronic PID controller, real-time load compensation, and LAUDA’s proprietary SmartCool adaptive cooling algorithm. This algorithm continuously monitors internal thermal load, ambient conditions, and fluid dynamics to modulate compressor output and fan speed, minimizing energy consumption while preserving reproducibility. The unit features a stainless-steel bath vessel (130 × 105 × 160 mm) with a nominal capacity of 4.0 L and a minimum fill volume of 3.3 L—optimized for compatibility with external reactors, viscometers, spectrophotometer cells, and jacketed glassware. Its footprint (180 × 350 mm) is deliberately minimized to ≤ A4 dimensions, enabling seamless integration into space-constrained fume hoods or analytical workstations without compromising thermal performance.

Key Features

• LAUDA Silver controller with monochrome graphical LCD: displays simultaneous setpoint and actual temperature, intuitive menu navigation via cursor keys and soft-touch buttons
• Vario 6-stage adjustable circulation pump: enables precise flow-rate tuning (0–22 L/min) for optimal heat transfer in both internal bath circulation and external loop configurations
• Class III safety certification: fully compliant with DIN EN 61010-1 for operation with flammable solvents (e.g., acetone, ethanol, hexane) and non-flammable media (water, silicone oil, glycol/water mixtures)
• Integrated programmable timer: supports single-sequence programming with up to 20 user-defined segments for ramp-hold-cool protocols
• Dual-point overtemperature protection: configurable Tmax limit with independent hardware and software safeguards
• Rear-mounted drain valve and quick-release pump connectors (13 mm plastic fittings): facilitate safe, spill-free thermal fluid exchange and maintenance
• Standard USB interface with firmware-upgradable communication architecture: supports future integration of optional modules including analog I/O (0–10 V / 4–20 mA), digital relay outputs, RS-232/485, Profibus DP, Ethernet TCP/IP, and Pt100/LiBus for external process control
• Energy-efficient SmartCool system: reduces compressor cycling and acoustic noise while extending service life and lowering total cost of ownership

Sample Compatibility & Compliance

The RE 415 S accommodates a broad spectrum of thermal transfer fluids—including deionized water, 50/50 ethylene glycol/water blends, silicone oils (up to 200 °C), and low-viscosity organic solvents—subject to compatibility verification per LAUDA’s Fluid Compatibility Matrix. Its Class III safety rating permits direct use with flammable liquids under controlled ventilation per IEC 60079-0 and ATEX Directive 2014/34/EU guidelines. The device conforms to electromagnetic compatibility standards EN 61326-1 (industrial environments) and electrical safety standard EN 61010-1:2010. All firmware and controller logic are designed to support GLP/GMP-aligned workflows, with audit-trail-ready parameter logging available via optional software packages compliant with FDA 21 CFR Part 11 requirements when paired with validated data acquisition systems.

Software & Data Management

While the RE 415 S operates autonomously via its embedded Silver controller, its USB port enables connection to LAUDA’s PC-based software suite (e.g., LAUDA LabControl Basic or Advanced) for remote monitoring, multi-unit synchronization, and export of time-stamped temperature/flow datasets in CSV or XML format. Optional communication modules allow integration into SCADA, LIMS, or MES platforms via Modbus RTU/TCP or OPC UA protocols. All programmable parameters—including ramp rates, hold durations, safety limits, and pump profiles—are stored in non-volatile memory with write-protection options to prevent accidental modification during routine operation. Firmware updates are delivered via signed binary packages verified through cryptographic checksums to ensure integrity and traceability.

Applications

• Calibration of temperature-sensitive instrumentation (e.g., thermocouples, RTDs, infrared sensors) per ASTM E74 and ISO/IEC 17025 requirements
• Thermal conditioning of samples prior to rheological, viscometric, or calorimetric analysis
• Temperature control of external jacketed reactors, condensers, and chromatographic columns in synthetic chemistry and pharmaceutical development
• Stabilization of optical components (e.g., laser diodes, interferometers) requiring sub-0.05 °C thermal drift suppression
• Accelerated aging studies under controlled thermal stress per ICH Q1A(R2) and ASTM D3045 protocols
• Material testing of polymers, adhesives, and composites using standardized thermal cycling profiles

FAQ

What is the minimum and maximum recommended working fluid volume?
The bath requires a minimum fill volume of 3.3 L to ensure full immersion of the heater and sensor elements and prevent dry-run damage. The maximum capacity is 4.0 L—exceeding this may impair pump priming and thermal homogeneity.
Can the RE 415 S operate continuously at 200 °C with external circulation?
Yes, provided the external loop is properly insulated, the connected equipment is rated for ≥200 °C, and a high-temperature-compatible fluid (e.g., silicone oil) is used. Continuous operation at upper temperature limits requires adequate ventilation around the unit’s rear condenser.
Is the SmartCool system compatible with natural refrigerants?
The standard RE 415 S uses R-134a; however, LAUDA offers certified variants equipped with hydrocarbon-based natural refrigerants (e.g., R-290) upon request—subject to regional regulatory approval and application-specific risk assessment.
Does the USB interface support real-time data streaming?
Yes—when connected to LAUDA LabControl software, the USB port delivers live temperature, setpoint, pump status, and alarm flags at 1 Hz resolution with timestamped logging.
What safety certifications apply to operation with flammable solvents?
The unit carries Class III safety certification per EN 61010-1 and is approved for use with flammable liquids in laboratory environments where local exhaust ventilation meets EN 14175-3 requirements. No additional explosion-proof housing is required for standard benchtop use.