Optima™ R Series Refrigerated Circulating Bath – GD120
| Origin | UK |
|---|---|
| Manufacturer Type | Authorized Distributor |
| Origin Category | Imported |
| Model | GD120 |
| Pricing | Available Upon Request |
| Temperature Range Options | 0–120 °C (S5/S12/S18), –15–120 °C (S26/S38) |
| Temperature Stability (DIN 58966 @37 °C) | ±0.02 °C |
| Temperature Uniformity (@37 °C) | ±0.05 °C |
| Setpoint Resolution | 0.1 °C |
| Display | 4-digit, 13 mm LED |
| Pre-set Temperature Memory | 4 values |
| Dual-Point Calibration | Yes |
| Heating Power | 1.4 kW (240 V), 1.3 kW (115 V) |
| Pump Max Pressure | 270 mbar (water), Max Flow Rate: 17 L/min |
| Tubing Port ID/OD | 6/11 mm |
| Safety Features | Adjustable overtemperature cut-out, float-switch level protection |
| Electrical Supply | 230 V / 1.5 kW (50 Hz), 120 V / 1.4 kW (60 Hz) |
| Bath Volumes | 5 L (S5), 12 L (S12), 18 L (S18), 26 L (S26), 38 L (S38) |
| Top Opening Dimensions (L×W) | 150×150 mm (S5), 210×300 mm (S12), 390×300 mm (S18/S26), 580×300 mm (S38) |
| Minimum/Maximum Liquid Depth | 80/140 mm (S5/S12), 70/130 mm (S18), 120/180 mm (S26/S38) |
| Internal Tank Dimensions (L×W×H) | 300×150×150 mm (S5), 325×300×150 mm (S12), 505×300×150 mm (S18), 505×300×200 mm (S26), 690×300×200 mm (S38) |
| External Dimensions (L×W×H) | 325×175×175 mm (S5), 350×325×175 mm (S12), 530×325×225 mm (S18/S26), 720×325×225 mm (S38) |
| External Dimensions with Controller (L×W×H) | 325×175×355 mm (S5), 350×325×355 mm (S12), 530×325×405 mm (S18/S26), 720×325×405 mm (S38) |
| Optional Immersion Chillers | C1G (all models), C2G (S26 & S38) |
Overview
The Optima™ R Series Refrigerated Circulating Bath – GD120 is an engineered thermal management system designed for precision temperature control in demanding laboratory and analytical applications. Utilizing a closed-loop refrigeration and heating architecture, the GD120 maintains stable bath temperatures across five distinct tank volume configurations (5 L to 38 L), supporting both ambient-to-high-temperature operation (0–120 °C) and sub-ambient capability (–15–120 °C) when equipped with optional immersion chillers. Its thermodynamic design integrates a high-efficiency compressor, PID-controlled resistive heating element, and a low-pulsation centrifugal circulation pump—enabling consistent thermal delivery to external equipment such as spectrophotometers, viscometers, calorimeters, or reaction jackets. Compliance with DIN 58966 ensures traceable performance validation under standardized test conditions, particularly at physiologically relevant setpoints like 37 °C.
Key Features
- Precision temperature stability of ±0.02 °C and uniformity of ±0.05 °C at 37 °C—validated per DIN 58966 methodology
- Four independent pre-set temperature memory locations for rapid protocol switching without manual re-entry
- Dual-point calibration support enables field-adjusted offset correction for long-term metrological integrity
- High-flow circulation (up to 17 L/min) and pressure head (270 mbar water column) ensure reliable thermal transfer to externally connected instrumentation
- Robust safety architecture including adjustable overtemperature cut-out, float-switch liquid-level monitoring, and audible/visual alarm activation on critical fault detection
- Modular chiller compatibility: C1G immersion unit supports extended low-temperature range; C2G option available for S26 and S38 models requiring higher cooling capacity
- Intuitive 4-digit LED display with 0.1 °C resolution and dedicated status indicators for pump, heater, and refrigeration status
Sample Compatibility & Compliance
The GD120 accommodates a broad range of heat-transfer media—including deionized water, water-glycol mixtures, silicone oils, and low-viscosity synthetic fluids—within its chemically resistant stainless-steel bath chamber. All internal wetted surfaces meet ISO 8502-3 standards for chloride-free passivation, minimizing corrosion risk during prolonged use with aggressive solvents. The system supports GLP-compliant workflows through configurable alarm logging and non-volatile parameter storage. While not inherently 21 CFR Part 11 compliant, audit-ready data export (via optional RS232/USB interface) facilitates integration into validated environments where electronic records are subject to FDA or EMA review. Bath dimensions and port configurations are optimized to accommodate standard immersion probes, jacketed reactors, and OEM instrument interfaces per IEC 61000-6-3 EMC guidelines.
Software & Data Management
Standard operation requires no external software; all parameters are managed via front-panel controls with tactile feedback and visual confirmation. For advanced integration, an optional digital interface module provides ASCII command protocol support (SCPI-compatible) enabling remote setpoint programming, real-time temperature readback, and event-triggered logging via LabVIEW, Python, or MATLAB environments. Logged data includes timestamped bath temperature, setpoint deviation, pump status, and alarm history—exportable as CSV for traceability and trending analysis. Firmware updates are delivered via secure USB key, maintaining version control and cybersecurity alignment with NIST SP 800-161 requirements for laboratory infrastructure.
Applications
- Calibration of temperature-sensitive sensors and reference standards in metrology labs
- Thermal conditioning of optical components in spectroscopy and interferometry setups
- Controlled-rate cooling/heating cycles for polymer crystallization studies and DSC sample preparation
- Stabilized thermal environment for enzymatic assays, cell culture incubators, and electrophoresis systems
- External temperature regulation of HPLC column ovens, GC injectors, and rheometer measuring geometries
- Process validation support in pharmaceutical development per USP and ISO 17025-accredited testing protocols
FAQ
What is the lowest operating temperature achievable with the GD120-S26 model?
With the C2G immersion chiller installed, the GD120-S26 achieves a minimum operating temperature of –15 °C while maintaining ±0.02 °C stability at 37 °C.
Can the GD120 be used with silicone oil as a heat-transfer fluid?
Yes—the stainless-steel bath and pump housing are compatible with common silicone oils up to 120 °C; viscosity limits should remain below 500 cSt at operating temperature to ensure adequate flow.
Is dual-point calibration performed in-house or does it require third-party service?
Dual-point calibration can be executed by the end user using two NIST-traceable reference thermometers and the built-in calibration menu; no firmware upload or vendor intervention is required.
Does the system include documentation for IQ/OQ protocol execution?
A comprehensive User Manual, Factory Test Report (including DIN 58966 verification data), and blank IQ/OQ checklists are supplied with each unit to support installation and operational qualification under GxP frameworks.
What maintenance intervals are recommended for the refrigeration circuit?
Under normal laboratory use (8 hrs/day, 5 days/week), compressor oil and filter replacement is recommended every 24 months; annual inspection of refrigerant charge and condenser coil cleanliness is advised.
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