Grant Optima™ TXF200 Series Circulating Bath

Overview

The Grant Optima™ TXF200 Series is a high-precision, digitally controlled circulating bath engineered for demanding laboratory applications requiring extreme thermal stability, wide operational range, and programmable thermal profiles. Operating across an exceptional temperature span of −50 °C to +200 °C, the TXF200 leverages Intelligent Control Optimization™ (ICO) — an adaptive PID algorithm that dynamically adjusts control parameters in real time based on bath fluid type (water, silicone oil, ethylene glycol mixtures), load mass, and ambient conditions. This ensures rapid equilibration, minimal overshoot, and long-term repeatability under variable thermal loads. Unlike basic immersion baths, the TXF200 integrates a robust internal circulation pump (21 L/min, 460 mbar) with dual 6 mm and 11 mm port fittings, enabling precise external flow control for jacketed reactors, calorimeters, or custom thermal test rigs. Its architecture complies with DIN 12876 Class III specifications for laboratory thermostats, guaranteeing stability of ±0.01 °C and uniformity of ±0.05 °C at 70 °C — performance validated per standardized test methodology.

Key Features

• Adaptive ICO temperature control with real-time fluid-type compensation and auto-tuning capability
• High-capacity internal circulation pump (adjustable 0–21 L/min, max 460 mbar) with dual-port manifold (6 mm / 11 mm)
• Full-color QVGA TFT display with intuitive rotary encoder interface and multilingual support (English, French, German, Spanish, Italian)
• 10-user-programmable sequences, each supporting up to 100 temperature/time steps; supports ramp-hold-cool cycles including simultaneous heating/cooling mode when paired with optional refrigeration units
• Dual-point user calibration for both internal sensor and external PT1000 probe — traceable to NIST-traceable standards
• Comprehensive safety suite: adjustable overtemperature cutoff, low-bath-level detection via mechanical float switch, visual/audible fault alerts, and automatic heater disable on critical error
• Regulatory-ready design: meets EN 61000-3-3 for harmonic current emissions; compatible with GLP/GMP environments via Labwise™ software audit trail functionality

Sample Compatibility & Compliance

The TXF200 is designed for seamless integration with Grant’s ST-series stainless-steel and P-series polypropylene baths (5–38 L capacity), as well as third-party vessels meeting ISO 17025-compliant dimensional and thermal inertia criteria. It supports external temperature monitoring using calibrated PT1000 probes (TXPEP/TXSEP models), enabling closed-loop control of sample chamber temperature independent of bath fluid. All units are CE-marked and manufactured in accordance with ISO 9001:2015 quality management systems. For regulated laboratories, the system supports 21 CFR Part 11 compliance when used with Labwise™ software configured for electronic signatures, role-based access control, and immutable audit logs of all setpoint changes and alarm events.

Software & Data Management

Labwise™ PC software provides full remote configuration, real-time monitoring, and compliant data recording. Users can define multi-step thermal protocols, adjust PID parameters, configure alarm thresholds, and perform two-point calibration — all via a validated Windows application. Raw temperature and timing data are timestamped and stored in CSV/Excel-compatible format with metadata (operator ID, instrument serial number, session ID). The software supports automated report generation, trend visualization, and export to LIMS platforms via ODBC. Data integrity is preserved through cyclic redundancy checks and optional encrypted local storage. Firmware updates are delivered via signed packages verified by SHA-256 hash.

Applications

• Accelerated stability testing per ICH Q1A(R3) guidelines using programmable thermal ramps and holds
• Calorimetric reference baths for DSC, ITC, and differential thermal analysis instrumentation
• Temperature control of bioreactors, photobioreactors, and enzymatic assay platforms
• Material testing under thermal stress: polymer crystallization kinetics, elastomer modulus profiling, and phase-change material characterization
• Low-temperature cryopreservation support when coupled with C1G or C2G refrigeration modules
• ISO/IEC 17025-accredited calibration labs performing thermometer and RTD verification across extended ranges

FAQ

What bath fluids are compatible with the TXF200 series?
Water, 50/50 ethylene glycol/water, silicone oils (e.g., Dow Corning 200 Fluid), and mineral oils — selected based on required viscosity and flash point. ICO automatically adapts heating/cooling response to fluid thermal mass and conductivity.
Can the TXF200 operate below ambient temperature without external refrigeration?
No. Sub-ambient operation requires connection to an external chiller or Grant’s C1G/C2G refrigeration modules via the integrated cooling coil interface.
Is Labwise™ software validated for use in FDA-regulated environments?
Yes — when deployed with documented IQ/OQ protocols, user access controls, and enabled audit trail logging, Labwise™ satisfies 21 CFR Part 11 requirements for electronic records and signatures.
How is temperature uniformity verified across the bath volume?
Per DIN 12876, uniformity is measured using nine calibrated PT100 sensors positioned in a 3×3 grid at working depth; results are factory-certified and provided in the Certificate of Conformance.
What maintenance is required to sustain long-term accuracy?
Annual verification of internal sensor calibration against a NIST-traceable reference; periodic inspection of pump seals and float switch actuation; cleaning of heat exchanger surfaces if using glycol or oil-based fluids.