Cole-Parmer 44175-00 Refrigerated/Heating Block System
| Brand | Cole-Parmer |
|---|---|
| Origin | USA |
| Model | 44175-00 |
| Temperature Range | −10 to 100 °C |
| Temperature Accuracy | ±1 °C |
| Timer Function | Up to 30 days with audible alarm |
| Data Storage | Built-in memory |
| Interface | RS232 (IBM PC compatible) |
| Power Supply | 100–232 V AC |
| Standard Configuration | Main unit + 12 V DC power supply (modules sold separately) |
Overview
The Cole-Parmer 44175-00 Refrigerated/Heating Block System is a precision temperature-controlled platform engineered for consistent thermal management of samples during incubation, enzymatic reactions, sample storage, and pre-analytical preparation. Unlike conventional dry baths or water baths, this system integrates active refrigeration and heating within a single compact block architecture—enabling rapid, bidirectional temperature transitions across a wide operational range (−10 °C to +100 °C). Its solid-state thermoelectric (Peltier) design eliminates reliance on compressors or circulating fluids, ensuring silent operation, minimal maintenance, and stable thermal gradients across the block surface. The system serves as a foundational thermal platform in molecular biology, clinical diagnostics, pharmaceutical QA/QC, and environmental sample processing labs where reproducible, time-resolved thermal conditioning is required prior to downstream analysis—including PCR setup, enzyme kinetics, protein denaturation studies, and reagent equilibration.
Key Features
- Precise digital temperature control with dual-display: setpoint and real-time block temperature, updated every second
- Programmable timer with configurable alarm (audible and visual) supporting durations up to 30 days
- Non-volatile internal memory retains user settings and last-run parameters after power interruption
- RS232 serial interface compliant with standard IBM PC communication protocols; enables remote monitoring and basic command-driven operation via terminal emulation or custom LabVIEW/Python scripts
- Universal AC input (100–232 V, 50/60 Hz) ensures compatibility with global laboratory power infrastructure
- Modular design supports interchangeable heated/cooled blocks—no tools required for module swapping
- Thermal uniformity ≤ ±0.5 °C across standard modules at steady state (measured per ASTM E2202-20)
Sample Compatibility & Compliance
The 44175-00 accommodates a broad range of consumables through its expandable module ecosystem—including 0.5 mL and 1.5 mL microcentrifuge tubes, 96-well and 384-well PCR plates, and 12–16 mm diameter test tubes. All modules are manufactured from anodized aluminum with optimized thermal mass and contact geometry to minimize axial temperature deviation. While the base unit itself does not carry CE or UKCA marking, it complies with IEC 61010-1:2010 for electrical safety in laboratory equipment when operated within specified ambient conditions (15–30 °C, <80% RH non-condensing). For regulated environments, the system may be integrated into GLP-compliant workflows when paired with validated modules and documented calibration procedures traceable to NIST standards.
Software & Data Management
The built-in RS232 interface permits integration into legacy laboratory information systems (LIS) or custom automation frameworks. Though no proprietary software is bundled, the device responds to ASCII-based commands (e.g., “T?” for current temperature, “S123.5” to set 123.5 °C), enabling script-driven batch control and timestamped data logging. Internal memory stores up to 100 event logs—including start/stop timestamps, setpoint changes, and alarm triggers—with retention independent of external connectivity. For audit-trail requirements under FDA 21 CFR Part 11, users must implement third-party data acquisition software with electronic signature and change-control capabilities; the hardware provides raw telemetry but no native user-role authentication or encrypted storage.
Applications
- Pre-chilling of restriction enzymes and ligases prior to digestion reactions
- Controlled thawing of cryopreserved cell suspensions or serum aliquots
- Equilibration of qPCR master mixes and RT-PCR reagents at defined temperatures
- Thermal stabilization of immunoassay plates during incubation steps
- Temperature-dependent solubility testing of APIs in early-stage formulation development
- Standardization of sample viscosity measurements prior to rheological analysis
- Supporting ISO 15197:2013-compliant glucose assay validation protocols requiring precise thermal preconditioning
FAQ
Does the 44175-00 include a heating/cooling module?
No—the main unit ships with only the control chassis and a 12 V DC power adapter. All sample-holding modules (e.g., 96-well PCR blocks, microcentrifuge tube holders) are optional accessories and must be ordered separately.
Can multiple modules be used simultaneously on one 44175-00 unit?
No—only one module can be mounted at a time. For dual-zone operation, the 44175-06 variant (dual-position configuration) is required.
Is calibration certificate included?
No factory calibration certificate is supplied. Users are responsible for periodic verification using NIST-traceable reference thermometers per internal SOPs or ISO/IEC 17025-accredited calibration services.
What is the maximum ramp rate between −10 °C and 100 °C?
Ramp rates are module-dependent and load-sensitive; typical average rates range from 0.8 °C/min (full-load 1.5 mL tubes) to 2.1 °C/min (empty block). Exact values require empirical characterization per application.
Is the RS232 interface optically isolated?
No—the RS232 port uses standard TTL-level signaling without galvanic isolation. Use of an externally powered USB-to-RS232 converter with isolation is recommended in electrically noisy environments.
