Hengping CH1006 Advanced Circulating Water Bath

Overview

The Hengping CH1006 Advanced Circulating Water Bath is a precision-engineered thermal stability platform designed for laboratory applications requiring accurate, reproducible temperature control across extended operating ranges. Built upon Couette-flow heat transfer principles and optimized fluid dynamics, the CH1006 delivers uniform thermal distribution within its 6-liter stainless-steel bath chamber. Its operational range spans from ambient +20 °C up to +300 °C—making it uniquely suited for high-temperature viscosity measurements, calibration of thermal sensors, and sample preconditioning in rheological, pharmaceutical, and polymer characterization workflows. Unlike basic immersion heaters, the CH1006 integrates dual-mode circulation (internal recirculation and external loop capability), enabling direct thermal coupling with external equipment such as rotational viscometers, spectrophotometer cells, or reaction jackets. The microprocessor-controlled PID algorithm ensures dynamic compensation for load changes and ambient drift, maintaining stability at ±0.05 °C over the critical +20 °C to +100 °C range—meeting the thermal precision requirements specified in ASTM D2196 and ISO 2555 for solution viscosity testing.

Key Features

• Stainless-steel bath tank with corrosion-resistant interior and reinforced structural integrity for long-term thermal cycling
• Dual circulation architecture supporting both internal bath homogenization and external closed-loop integration via standardized 6-mm quick-connect ports
• PID-controlled heating system with 0.1 °C digital resolution and adaptive tuning to minimize overshoot during ramp-up
• Φ70 mm central aperture (standard) compatible with standard 200 mL beakers and Brookfield-type viscometer spindles; optional rectangular opening (145 × 150 × 150 mm) available for larger sample vessels
• Integrated safety mechanisms including over-temperature cutoff, dry-run protection, and ground-fault circuit interruption (GFCI)
• Compact footprint (190 × 334 × 345 mm) optimized for benchtop deployment in regulated QC laboratories

Sample Compatibility & Compliance

The CH1006 accommodates a broad spectrum of sample configurations: standard glass beakers (up to 200 mL), U-tube viscometers, capillary tubes, and custom-mounted sensor probes. Its open-bath geometry allows unobstructed access for probe insertion, stirrer integration, or real-time optical monitoring. While not intrinsically compliant with IEC 61010-1 for hazardous environments, the unit meets GB/T 25126.1–2010 (Chinese national standard for laboratory heating equipment) and incorporates design elements aligned with ISO/IEC 17025 traceability frameworks—particularly in temperature uniformity mapping and calibration certificate support. When operated within its validated range (+20 °C to +100 °C), the CH1006 supports GLP-compliant viscosity testing per USP and EP 2.2.25 protocols when paired with documented calibration records and audit-trail-capable data loggers.

Software & Data Management

The CH1006 operates as a standalone analog-digital hybrid controller with no embedded network interface or proprietary software stack. Temperature setpoints, real-time readings, and stability status are displayed on a front-panel LED screen with 0.1 °C resolution. For integration into automated workflows, analog 0–5 V or 4–20 mA output signals (optional configuration) enable connection to SCADA systems, PLCs, or third-party DAQ hardware such as National Instruments cDAQ modules. Users deploying the bath in regulated environments are advised to pair it with external validation-grade thermistors (e.g., Hart Scientific 1590) and time-stamped logging solutions that satisfy FDA 21 CFR Part 11 requirements for electronic record retention and operator accountability.

Applications

• Routine calibration and operation of rotational viscometers (e.g., Brookfield DV2T, Anton Paar Physica MCR series) requiring stable thermal baths for Newtonian and non-Newtonian fluid characterization
• Thermal preconditioning of polymer melts, resins, and adhesives prior to rheological analysis or tensile testing
• Stabilization of optical cells in UV-Vis spectrophotometry where temperature-induced refractive index shifts must be minimized
• Controlled-temperature incubation of enzymatic or microbial samples in pre-analytical preparation steps
• Supporting ASTM D445 kinematic viscosity determinations using calibrated capillary viscometers

FAQ

Is the CH1006 suitable for oil bath operation?
Yes—the unit is rated for use with silicone oils and other thermally stable heat-transfer fluids up to +300 °C; however, oil compatibility requires verification of pump seal material (standard NBR seals are oil-resistant but not suitable for chlorinated solvents).
Can external temperature sensors be connected for independent verification?
Yes—via optional analog output terminals or by installing a calibrated PT100 probe directly into the bath fluid and referencing it against the unit’s internal sensor for deviation tracking.
Does the CH1006 support cooling functionality?
No—it is a heating-only system; active cooling requires integration with an external chiller unit via the external circulation port.
What maintenance intervals are recommended for sustained accuracy?
Biannual inspection of pump impeller integrity, gasket condition, and PID parameter drift is recommended; annual recalibration against NIST-traceable standards is advised for GLP/GMP environments.
Is the bath opening customizable for specialized fixtures?
Yes—custom aperture plates with threaded inserts or alignment guides can be fabricated upon request to accommodate proprietary sensor mounts or multi-probe assemblies.