Herrytech YQ-4006 Vertical Cryogenic Thermostat

Overview

The Herrytech YQ-4006 Vertical Cryogenic Thermostat is a precision-engineered temperature control system designed for laboratory and industrial applications requiring stable, wide-range thermal regulation of liquid media. Based on closed-loop vapor-compression refrigeration combined with electric heating, the unit delivers accurate, reproducible temperature control from −40 °C to +100 °C—enabling both cryogenic testing and high-temperature stabilization within a single compact vertical chassis. Its core architecture integrates an imported hermetic compressor, high-efficiency heat exchanger, and PID-driven digital temperature controller with integrated PT100 sensing. Unlike benchtop immersion circulators, the YQ-4006 features a vertically oriented bath configuration optimized for space-constrained labs while maintaining sufficient internal volume (6 L) and open access (180 × 140 mm aperture) for direct sample submersion or external circulation via its built-in 12 L/min pump. The system supports multiple heat transfer fluids—including deionized water, ethylene glycol/water mixtures, and ethanol-based solutions—ensuring compatibility with diverse thermal conductivity, freezing point, and chemical compatibility requirements across physical chemistry, materials science, and biopharmaceutical workflows.

Key Features

• Eco-compliant refrigeration: Uses non-ozone-depleting, low-global-warming-potential (GWP) refrigerant; fully sealed compressor eliminates leakage risk and meets ISO 5149 and EU F-Gas Regulation (EU No. 517/2014) requirements.
• High-stability thermal control: Integrated PID algorithm with auto-tuning capability ensures ±0.1 °C temperature stability over time; standard 0.1 °C display resolution, upgradable to 0.01 °C or 0.001 °C for metrology-grade applications.
• Uniform temperature distribution: U-shaped internal flow channel and submerged circulation impeller minimize thermal stratification; validated temperature uniformity ≤±0.2 °C across full bath volume at steady state.
• Dual-mode operation: Simultaneous heating and cooling capacity enables rapid ramping and overshoot suppression—critical for dynamic thermal cycling protocols in polymer characterization or enzyme kinetics studies.
• Robust construction: 304 stainless steel inner bath and work surface resist corrosion from aqueous, acidic, or mildly organic media; electrostatically applied anti-aging powder coating on exterior housing enhances durability in shared lab environments.
• Operator safety and serviceability: Rounded front-panel edges prevent accidental injury; front-access drain valve simplifies fluid replacement; redundant safety layers include over-temperature cutoff, compressor thermal overload protection, phase-loss detection, and audible/visual alarm triggers.

Sample Compatibility & Compliance

The YQ-4006 accommodates direct immersion of samples up to 180 mm × 140 mm footprint and 180 mm height, supporting common laboratory vessels (e.g., beakers, reaction flasks, cuvettes, sensor probes). External recirculation enables integration with jacketed reactors, viscometers, calorimeters, condensers, and chromatographic column ovens. Fluid compatibility extends to water, 30–60% ethylene glycol/water blends, and anhydrous ethanol—validated per ASTM D1121 and ISO 2592 for thermal stability and vapor pressure behavior. The system complies with IEC 61010-1:2010 for electrical safety in laboratory equipment and supports GLP/GMP-aligned operation through configurable alarm logging and user-accessible calibration offset adjustment (traceable to NIST-certified references).

Software & Data Management

While the YQ-4006 operates autonomously via its front-panel interface, optional RS485 (Modbus RTU) or USB-to-serial interface enables remote monitoring and control via third-party SCADA or LIMS platforms. Logged temperature data—including setpoint, actual bath temperature, compressor status, and alarm events—is timestamped and exportable as CSV. Audit trail functionality satisfies FDA 21 CFR Part 11 requirements when paired with validated host software, including electronic signature support and immutable record retention. Firmware updates are performed via secure USB key to maintain regulatory integrity.

Applications

• Calibration of thermometers, RTDs, and thermocouples per ISO/IEC 17025 requirements.
• Viscosity measurements using rotational or capillary viscometers requiring precise thermal conditioning of test fluids.
• Accelerated aging studies of polymers, adhesives, and coatings under controlled low-temperature stress.
• Enzyme activity assays and protein folding experiments where thermal hysteresis must be minimized.
• Supporting cryogenic condensation in rotary evaporation systems or fractional distillation setups.
• Material testing per ASTM D696 (coefficient of linear expansion) and ASTM D5229 (low-temperature tensile properties).

FAQ

What types of heat transfer fluids are compatible with the YQ-4006?
Deionized water, 30–60% ethylene glycol/water mixtures, and anhydrous ethanol are validated for use. Avoid chlorinated solvents, acetone, or hydrocarbons due to material compatibility and flash point risks.
Can the unit maintain temperature stability during continuous external circulation?
Yes—the 12 L/min pump and oversized heat exchanger ensure ≤±0.15 °C deviation under full external load (up to 10 m tubing length, 10 m head), verified per internal thermal load testing protocol.
Is calibration documentation provided with shipment?
A factory calibration certificate (traceable to national standards) is included; optional on-site IQ/OQ validation support is available upon request.
Does the system support programmable temperature ramps?
Standard firmware includes 10-segment ramp-soak profiles; advanced sequencing requires optional PC-based control software.
What maintenance intervals are recommended?
Compressor oil and refrigerant charge require inspection every 24 months; filter-drier replacement every 36 months; annual verification of PT100 sensor drift against reference standard.