Hengping CH-1015 Precision Circulating Bath with External Temperature Control

Overview

The Hengping CH-1015 Precision Circulating Bath is an engineered thermal management system designed for laboratory environments requiring stable, uniform, and reproducible temperature control across both internal and external experimental setups. Based on a microprocessor-controlled PID algorithm with auto-tuning capability, the bath utilizes a high-stability Pt100 platinum resistance thermometer for real-time feedback, enabling precise regulation within ±0.05 °C over its operational range of ambient +15 °C to 100 °C. Its dual-circulation architecture—featuring independent internal and external fluid pathways—allows simultaneous use as a primary temperature-controlled bath and as a source for secondary temperature fields (e.g., jacketed reactors, viscometers, or optical cells). The unit’s stainless steel 304 construction ensures chemical resistance and long-term structural integrity under continuous operation, while its compact footprint (370 × 340 × 480 mm) supports integration into space-constrained analytical workstations.

Key Features

• Microprocessor-based PID temperature controller with self-tuning functionality for rapid stabilization and minimal overshoot
• Dual Pt100 sensor interface supporting seamless switching between internal bath temperature monitoring and external process temperature feedback
• High-flow circulation pump delivering 10 L/min at low pressure drop, optimized for compatibility with external heat exchangers and jacketed vessels
• Stainless steel 304 inner tank and housing—resistant to corrosion from water, aqueous buffers, and mild organic solvents
• Integrated safety systems including overtemperature cut-off, open-sensor (break) detection, and thermal fuse protection
• 0.1 °C display resolution with intuitive front-panel keypad and LED status indicators for operational transparency
• Energy-efficient 1.5 kW heating system with insulated enclosure to minimize thermal drift and ambient load

Sample Compatibility & Compliance

The CH-1015 is compatible with a broad spectrum of laboratory fluids—including deionized water, ethylene glycol/water mixtures, silicone oils (within specified viscosity limits), and other non-aggressive heat-transfer media. Its design adheres to general electrical safety requirements per IEC 61010-1 for laboratory equipment. While not certified to specific ISO/IEC 17025 or GLP validation protocols out-of-the-box, the instrument’s traceable temperature stability (±0.05 °C), repeatable setpoint response, and audit-ready operational logs (via optional RS232/USB data export) support compliance-driven workflows in QC laboratories operating under ISO 9001, ISO/IEC 17025, or pharmaceutical GMP frameworks. Users are advised to perform periodic verification using NIST-traceable reference thermometers per ASTM E74 or ISO 17025 Clause 6.5.

Software & Data Management

The CH-1015 operates autonomously via its embedded controller; no proprietary software is required for basic operation. For enhanced data integrity and regulatory alignment, optional serial (RS232) or USB interfaces enable connection to third-party SCADA or LIMS platforms. Real-time temperature logging—including internal bath temperature, external probe reading, setpoint, and alarm status—can be captured at user-defined intervals (1–60 s). All logged data retain timestamping and are exportable in CSV format. When integrated into validated environments, the system supports electronic record retention aligned with FDA 21 CFR Part 11 principles—provided that appropriate access controls, audit trails, and electronic signature mechanisms are implemented at the host software level.

Applications

• Calibration of thermometers, thermocouples, and RTDs in metrology labs
• Temperature conditioning of samples prior to rheological, viscometric, or spectroscopic analysis
• Thermal stabilization of optical components (e.g., lasers, detectors) requiring sub-0.1 °C stability
• External jacket temperature control for glass reactors, bioreactors, and calorimeters
• Accelerated stability testing in pharmaceutical and food science applications per ICH Q1A(R2)
• Material property evaluation—including coefficient of thermal expansion (CTE) and phase transition behavior—in materials science research

FAQ

What is the maximum recommended fluid viscosity for external circulation?

For optimal pump performance and thermal transfer efficiency, fluids with kinematic viscosity below 50 cSt at operating temperature are recommended. Higher-viscosity media may require reduced flow rates or auxiliary pumping.

Can the CH-1015 maintain temperature during power interruptions?

No—this unit lacks battery backup or thermal mass retention features. Upon power loss, temperature drift will occur; users requiring continuity should integrate uninterruptible power supplies (UPS) rated for resistive loads.

Is the external Pt100 sensor included with the standard configuration?

Yes—the CH-1015 ships with one calibrated external Pt100 probe (3-meter cable, IP65-rated connector) and corresponding rear-panel interface. Additional probes require separate ordering.

How often should maintenance be performed?

Comprehensive inspection—including condenser coil cleaning, refrigerant pressure check (if applicable), and calibration verification—is recommended every 12 months or after 2,000 operational hours, whichever occurs first.

Does the unit comply with CE or UL certification standards?

The CH-1015 meets general EMC and LVD requirements per EN 61326-1 and EN 61010-1; however, it does not carry CE marking or UL listing. Customers requiring certified units should consult Hengping’s OEM division for region-specific compliance variants.