CZGY HH-YRC800 Dual-Bath Constant-Temperature Magnetic Stirring Circulating Water Bath

Overview

The CZGY HH-YRC800 is a dual-chamber, constant-temperature magnetic stirring circulating water bath engineered for reproducible thermal control and homogeneous mixing in analytical, biochemical, and synthetic laboratory workflows. It operates on resistive heating with precision PID-based temperature regulation—utilizing segmented LCD displays for real-time monitoring of both baths independently. Unlike single-bath systems, the HH-YRC800 integrates two fully independent 60 L stainless steel tanks, each equipped with a high-torque DC magnetic stirrer and internal recirculation loop. This architecture enables simultaneous yet distinct thermal and agitation conditions across two sample sets—critical for comparative studies, parallel reaction optimization, or multi-step extraction protocols requiring staggered timing or temperature gradients. Its design conforms to fundamental thermodynamic requirements for bath-based heating: uniform heat distribution via convection-enhanced circulation, minimized thermal lag through low-mass 304 stainless steel construction, and stable setpoint maintenance under variable load conditions.

Key Features

• Dual independent 60 L baths with separate digital controllers, allowing concurrent operation at different temperatures and stirring speeds
• Superior temperature stability of ±0.5°C across the full range (RT + 5°C to 100°C), verified per ASTM E2777-21 guidelines for liquid bath performance validation
• High-resolution 0.1°C temperature readout and programmable timer up to 9999 minutes/hours with three selectable timing modes (continuous, countdown, interval)
• Robust 2 × 200 W DC stirring motors delivering consistent torque from startup to 2000 rpm—engineered for uninterrupted operation over 36-hour periods without thermal derating
• Integrated dry-run protection activated automatically when water level drops below ~15 cm, preventing heater element damage and supporting GLP-compliant usage logs
• Full 304 stainless steel wetted and structural components—resistant to corrosion from aqueous buffers, organic solvents, and mild acids commonly used in extraction and hydrolysis procedures

Sample Compatibility & Compliance

The HH-YRC800 accommodates standard laboratory glassware including round-bottom flasks (up to 5 L per bath), jacketed reactors, condenser assemblies, and immersion probes. Its open-bath geometry supports direct placement of vessels with external reflux or inert gas lines. The system meets mechanical safety requirements outlined in IEC 61010-1:2010 for laboratory electrical equipment and incorporates grounding continuity verification per EN 61326-1. While not certified for medical device manufacturing, its construction and control architecture align with general-purpose ISO/IEC 17025 laboratory environment expectations for temperature-controlled ancillary equipment. Dry-run protection and thermal cut-off circuits contribute to compliance with OSHA 1910.1200 (Hazard Communication) and local institutional EH&S policies governing heated bath operations.

Software & Data Management

The HH-YRC800 operates via embedded firmware with no external PC dependency. All operational parameters—including setpoints, timers, and motor speeds—are stored in non-volatile memory and retained after power cycling. Though it lacks USB or Ethernet connectivity, its dual-LCD interface provides timestamped event logging (e.g., timer start/stop, over-temperature alerts) accessible via front-panel navigation. For laboratories implementing 21 CFR Part 11 compliance, optional external data loggers (e.g., Omega OM-DAQPRO-5300 series) may be interfaced using analog 0–5 V output signals available on terminal blocks—enabling audit-trail-capable recording of temperature and speed profiles synchronized with LIMS entries.

Applications

• Controlled-rate solvent evaporation and gentle concentration of heat-sensitive biomolecules (e.g., proteins, nucleic acids)
• Parallel synthesis of metal-organic frameworks (MOFs) or nanoparticle dispersions requiring identical thermal history but independent agitation intensity
• Soxhlet extraction pre-heating and condensate temperature stabilization in environmental testing labs
• Enzyme kinetic assays where precise thermal equilibration precedes substrate addition across replicate cuvettes
• Calibration of thermocouples and RTDs using NIST-traceable reference baths operating at fixed points (e.g., 37°C, 60°C, 95°C)
• Pre-conditioning of polymer solutions prior to rheological measurement to eliminate thermal history effects

FAQ

Does the HH-YRC800 support external temperature probe feedback for improved accuracy?
No—the unit relies on built-in PT100 sensors located near the heater elements; external probe input is not supported.
Can the two baths operate at different temperatures simultaneously?
Yes—each bath has an independent PID controller and LCD display, enabling differential setpoints within the 5–100°C range.
Is oil bath operation permitted in both chambers?
Yes—provided thermal oil viscosity remains suitable for internal pump circulation at the selected temperature; maximum recommended oil temperature is 180°C, though bath control is limited to 100°C.
What is the typical time to reach 100°C from ambient with a full 60 L load?
Approximately 40 minutes at rated power (2400 W per bath), assuming initial water level ≥15 cm and ambient temperature of 25°C.
Are replacement stir bars included with the system?
Standard PTFE-coated stir bars (ø15 × 40 mm) are supplied for each bath; additional sizes and chemically resistant variants (e.g., PTFE/glass core) are available as accessories.