Thermo Fisher Scientific Polar Series Accel 250/500 Integrated Heating & Cooling Circulating Chiller

Overview

The Thermo Fisher Scientific Polar Series Accel 250/500 is an integrated, air-cooled heating and cooling circulating chiller engineered for precise thermal management of laboratory instrumentation—including spectrophotometers, rotary evaporators, ICP-MS sample introduction systems, laser sources, and analytical chromatography modules. Built upon the legacy temperature control expertise of NESLAB and HAAKE—both acquired and unified under Thermo Fisher’s platform—the Accel series leverages over 75 years of applied thermodynamics R&D to deliver stable, responsive, and contamination-free heat exchange in closed-loop applications. Its operation relies on a dual-mode refrigeration cycle with inverter-driven compressor technology, enabling continuous modulation of cooling output without on/off cycling—critical for minimizing thermal overshoot and maintaining process integrity during extended runs. The unit integrates resistive heating (2 kW) and variable-speed refrigeration into a single compact chassis, eliminating the need for external heaters or auxiliary chillers in most benchtop workflows.

Key Features

• Wide operational temperature range from −10 °C to +80 °C with ±0.1 °C stability (measured at reservoir outlet under steady-state conditions per ISO 17025 traceable calibration protocol)
• Inverter-controlled hermetic compressor delivering smooth, stepless refrigeration capacity adjustment—enhancing energy efficiency and extending component service life
• Dual-pump configuration options: high-pressure-only mode (max. 300 mbar, 15 L/min) or pressure/suction hybrid mode (max. 805 mbar, 21 L/min) for compatibility with elevated backpressure systems such as jacketed reactors or long fluidic manifolds
• Intuitive LCD interface with PID parameter tuning, real-time graphing of setpoint/actual temperature, and programmable ramp-soak profiles
• Multiple communication interfaces including USB (virtual COM port), RS-232, and optional Ethernet (Modbus TCP)—enabling integration into LabVantage, STARLIMS, or custom SCADA environments
• Compliance with DIN 12876 Class 3 (NFL) safety requirements for laboratory refrigerating equipment—ensuring protection against overtemperature, low-level fluid detection, and compressor overload

Sample Compatibility & Compliance

The Accel 250/500 is designed for use with water, water-glycol mixtures (up to 30% v/v), and other non-corrosive, low-viscosity heat transfer fluids compatible with stainless steel 316 wetted parts and EPDM seals. It is not intended for direct contact with organic solvents or aggressive media. All units undergo factory verification per ASTM E2654-20 (Standard Practice for Verification of Thermal Performance of Liquid Circulators) and are supplied with a certificate of conformance listing traceable calibration points. Regulatory alignment includes UL 61010-1, CSA C22.2 No. 61010-1, EN 61000-6-3 EMC emission compliance, and RoHS Directive 2011/65/EU. For regulated environments, audit-ready electronic logs (including temperature history, alarm events, and user actions) can be exported via USB and support FDA 21 CFR Part 11-compliant data integrity when deployed with validated LIMS interfaces.

Software & Data Management

Thermo Fisher provides the free PolarLink PC software suite for remote monitoring, profile programming, and data export in CSV or XML format. The software supports time-stamped event logging (e.g., pump start/stop, temperature deviation alerts, compressor runtime), configurable email/SNMP notifications, and synchronization with NTP servers for timestamp accuracy. All firmware updates are digitally signed and delivered through Thermo Fisher’s secure customer portal—ensuring integrity and version control across multi-site deployments. For GxP laboratories, optional IQ/OQ documentation packages are available, including test protocols aligned with ISO/IEC 17025 and EU Annex 11 expectations for computerized system validation.

Applications

• Temperature stabilization of UV-Vis, FTIR, and fluorescence spectrometers requiring sub-0.2 °C thermal drift control over 8+ hour acquisitions
• Cooling of high-power diode lasers and optical parametric oscillators where rapid thermal response (<60 s to settle within ±0.05 °C of setpoint) is essential
• Condenser temperature control in rotary evaporation systems operating under vacuum, minimizing solvent bumping and improving recovery yield
• Thermal conditioning of ICP-MS torches and spray chambers to reduce polyatomic interferences (e.g., ArO⁺, ArN⁺) via consistent plasma gas cooling
• Support of accelerated stability testing chambers (AST) where chiller units serve as primary heat sinks for environmental stress screening

FAQ

What fluid types are approved for use with the Accel 250/500?
Water, 20–30% aqueous ethylene or propylene glycol solutions, and other non-oxidizing, pH-neutral fluids compatible with stainless steel 316 and EPDM elastomers. Do not use acetone, THF, chlorinated solvents, or mineral oils.

Is the unit suitable for cleanroom or ISO Class 5 environments?
The Accel series meets ISO 14644-1 airborne particle limits when operated outside the cleanroom envelope; however, its air-cooled condenser requires ≥30 cm clearance on all sides for unrestricted airflow and should not be installed inside laminar flow hoods or confined enclosures.

Can the chiller maintain temperature during power interruption?
No internal battery backup is provided. Upon AC loss, the system enters safe shutdown; temperature drift follows Newtonian cooling kinetics dependent on connected load thermal mass. Optional uninterruptible power supply (UPS) integration is supported via dry-contact alarm relay outputs.

How is calibration traceability established?
Each unit ships with a factory calibration report referencing NIST-traceable RTDs. Users may perform field verification using a calibrated reference thermometer per ISO/IEC 17025 Section 6.5.2; Thermo Fisher offers accredited on-site calibration services (ISO/IEC 17025 accredited lab).

Does the three-year warranty cover compressor replacement?
Yes—the global limited warranty includes parts and labor for compressor failure due to material or workmanship defects, subject to proper installation, ambient environment compliance (≤32 °C ambient, <80% RH), and adherence to scheduled maintenance intervals outlined in the operator manual.