CZGY HH-Series Digital Constant-Temperature Magnetic Stirring Water Bath

Overview

The CZGY HH-Series Digital Constant-Temperature Magnetic Stirring Water Bath is an integrated laboratory thermal platform engineered for precise temperature maintenance and uniform sample agitation in aqueous environments. It operates on the principle of resistive immersion heating combined with permanent-magnet-driven magnetic stirring—enabling simultaneous, independent thermal regulation and mechanical homogenization within each well. Unlike conventional water baths or standalone stirrers, this instrument eliminates thermal stratification and concentration gradients by coupling PID-controlled heating (with adjustable P, T, and E parameters) with localized magnetic drive systems. Designed for routine benchtop applications in analytical chemistry, biochemistry, pharmaceutical QA/QC, and materials science labs, it supports standardized protocols requiring controlled thermal exposure—including ASTM D129, ISO 8573-3 (for moisture conditioning), USP (melting point determination support), and GLP-compliant dissolution pre-conditioning.

Key Features

• Independent digital temperature control per unit (not per well), with LED display and ±0.5 °C accuracy across ambient to 100 °C range
• Integrated magnetic stirring in every well—each accommodates standard 120 mm-diameter vessels with compatible stir bars
• Adjustable analog speed control (0–1600 rpm), optimized for low-shear mixing of viscous or temperature-sensitive solutions
• Corrosion-resistant 304 stainless steel inner bath, welded construction with seamless corners for easy cleaning and long-term fluid integrity
• Epoxy-powder-coated cold-rolled steel exterior providing mechanical durability and chemical resistance against common lab solvents
• Configurable well layouts: single-row (HH-4/HH-6/HH-8) and double-row (HH-S2/HH-S4/HH-S6/HH-S8) models to match throughput requirements
• Programmable PID controller with accessible tuning parameters (P: proportional band; T: cycle time; E: cut-off anticipation) for adaptive thermal response
• Safety-certified 220 V AC input with grounded three-pin plug, built-in dry-run protection, and over-temperature cutoff

Sample Compatibility & Compliance

The HH-Series accommodates standard borosilicate glass beakers (50–1000 mL), stainless steel containers, and polypropylene vessels rated for continuous 100 °C exposure. Its open-bath architecture allows direct insertion of probes (e.g., pH, conductivity, dissolved oxygen) without interference. The unit complies with IEC 61010-1:2010 for electrical safety in laboratory equipment and meets basic EMC requirements per EN 61326-1. While not certified for Class I Div 1 hazardous locations, its grounded design and sealed electronics satisfy general-purpose lab installation per NFPA 45 and local institutional EHS guidelines. All models support documentation traceability under GLP/GMP frameworks when paired with external calibration logs and user-defined SOPs.

Software & Data Management

This analog-digital hybrid instrument does not include embedded data logging or PC connectivity. Temperature setpoints and stirring speed are manually configured via front-panel controls. However, its transparent PID parameter interface (accessible via 3-second SET key press) enables method reproducibility across operators and shifts. Users may record operational parameters—including setpoint, actual bath temperature (monitored visually), stir speed, duration, and water level—in paper-based or LIMS-integrated electronic batch records. For audit readiness, laboratories routinely validate performance annually using NIST-traceable RTDs and verify thermal uniformity per ISO/IEC 17025 clause 5.10.2—particularly critical when supporting USP , EP 2.2.17, or ASTM E2251 dissolution auxiliary steps.

Applications

• Controlled-temperature enzymatic reactions and protein denaturation studies
• Pre-heating and equilibration of reagents prior to HPLC or GC injection
• Standardized sample digestion in environmental testing (e.g., EPA Method 3010A)
• Moisture content conditioning of polymers and pharmaceutical excipients
• Accelerated stability testing of liquid formulations at defined thermal setpoints
• Supporting Karl Fischer titration sample preparation via precise water bath temperature control
• Cell culture media warming and buffer equilibration in molecular biology workflows

FAQ

What is the minimum water level required for safe operation?
The water level must exceed the heating element by at least 30 mm to prevent dry firing and thermal damage.
Can the unit maintain temperature uniformity across all wells simultaneously?
Yes—thermal uniformity is ensured through symmetrical heater placement, high-conductivity stainless steel bath geometry, and individual magnetic stirrer activation per well.
Is calibration traceable to national standards?
The instrument itself is not supplied with a calibration certificate; however, its temperature sensor and controller are compatible with external NIST-traceable thermometers for on-site verification per ISO/IEC 17025.
Does it support remote monitoring or data export?
No—this is a stand-alone analog/digital control system without USB, RS-232, or Ethernet interfaces.
Are custom well configurations or non-standard tank dimensions available?
Yes—CZGY offers OEM engineering services for modified well spacing, extended depth tanks, or corrosion-resistant coatings (e.g., electropolished SS316) upon request and technical review.