LAUDA Integral 280 XTW Circulating Chiller

Overview

The LAUDA Integral 280 XTW is a high-performance, water-cooled circulating chiller engineered for demanding laboratory and industrial applications requiring precise, stable thermal control across an exceptionally wide temperature range—from –80 °C to +220 °C. Unlike conventional chillers limited to cryogenic or ambient regimes, the Integral 280 XTW integrates a dual-circuit refrigeration system with electric heating and advanced PID-based temperature regulation to achieve seamless transition between deep cooling and high-temperature operation. Its design adheres to the fundamental principles of thermodynamic stability in closed-loop heat transfer: the chiller maintains setpoint accuracy via real-time feedback from high-resolution Pt100 sensors immersed directly in the circulation loop, coupled with adaptive compressor modulation and proportional heater control. This architecture ensures minimal thermal overshoot and rapid equilibration—critical for applications such as high-resolution spectroscopy, reaction calorimetry, and materials testing where thermal drift directly impacts data fidelity.

Key Features

• Wide operational temperature span (–80 to +220 °C) enabled by optimized cascade refrigeration and high-temperature silicone oil compatibility
• Water-cooled condenser configuration—reduces ambient heat load and enables installation in temperature-sensitive environments (e.g., cleanrooms or shared instrument suites)
• High-flow, low-pulsation circulation pump delivering up to 65 L/min at 3.1 bar pressure, supporting long fluid paths and multi-instrument distribution
• Adjustable reservoir volume (4.8–17.2 L) via modular expansion tank—optimizes thermal mass for both rapid response and long-term stability
• Robust stainless steel housing with IP54-rated electronics enclosure, compliant with IEC 61000-6-2/6-4 for electromagnetic immunity and emission control
• Integrated safety systems including dry-run protection, overtemperature cutoff, low-level alarm, and refrigerant leak detection per EN 378-1

Sample Compatibility & Compliance

The Integral 280 XTW is compatible with a broad spectrum of heat transfer fluids—including water/glycol mixtures, silicone oils (e.g., DC200 series), and specialized low-temperature baths—subject to viscosity and flash point constraints within its operational envelope. Its fluid path features electropolished 316L stainless steel tubing and EPDM-free wetted components, minimizing leaching and ensuring compatibility with GMP-compliant processes. The unit meets CE marking requirements under the EU Machinery Directive 2006/42/EC and the Low Voltage Directive 2014/35/EU. It supports GLP and GMP workflows through configurable audit trails, user-access levels, and optional 21 CFR Part 11–compliant software modules when integrated with LAUDA’s ProLine+ controller platform.

Software & Data Management

Equipped with LAUDA’s ProLine+ touchscreen interface (7″ capacitive display), the Integral 280 XTW provides intuitive local control with programmable ramp/soak profiles, event logging, and real-time trend visualization. Optional Ethernet and RS485 interfaces enable integration into centralized lab infrastructure via Modbus TCP or LAUDA’s proprietary LabSoft protocol. Logged data—including temperature, flow rate, compressor status, and error codes—is timestamped and exportable in CSV format. When deployed with LAUDA’s LabControl Suite (v5.2+), the chiller supports remote monitoring, alarm forwarding via SMTP/SNMP, and automated report generation aligned with ISO/IEC 17025 documentation requirements.

Applications

• Temperature control of high-field NMR probes and FTIR spectrometers requiring sub-0.1 K stability at cryogenic setpoints
• Cooling of high-power laser diodes and optical parametric oscillators operating up to 200 °C
• Thermal conditioning of rheometers, DSC instruments, and dynamic mechanical analyzers during extended isothermal holds
• Process support for pilot-scale chemical synthesis reactors with exothermic/endothermic cycling protocols
• Calibration laboratories performing thermometer and sensor verification across extended temperature ranges per ASTM E74 and ISO 17025

FAQ

What heat transfer fluids are recommended for operation below –40 °C?
For temperatures down to –80 °C, LAUDA recommends using LAUDA Therminol LT or equivalent low-viscosity, low-vapor-pressure synthetic heat transfer fluids. Water/glycol mixtures are not suitable below –20 °C due to freezing risk and increased pump load.
Can the Integral 280 XTW be integrated into a building management system (BMS)?
Yes—via optional Modbus TCP or BACnet/IP gateway modules, enabling read-only status monitoring and basic setpoint adjustment within third-party BMS platforms.
Is external water supply required for the water-cooled condenser?
Yes—the unit requires a continuous supply of deionized or softened water at 10–30 °C inlet temperature, 2–6 bar pressure, and minimum flow rate of 2.5 m³/h to ensure optimal condenser performance and compressor longevity.
Does the chiller support automatic fluid level replenishment?
No—fluid top-up is manual; however, the reservoir includes a sight glass, level sensor with visual/audible alarm, and a calibrated fill port for repeatable refilling procedures.
What is the typical service interval for preventive maintenance?
LAUDA recommends annual inspection of refrigerant charge, condenser cleanliness, pump seal integrity, and calibration verification—documented in accordance with ISO 55001 asset management standards.