CZGY SHA-6A Cryogenic Magnetic Stirring Water Bath

Overview

The CZGY SHA-6A Cryogenic Magnetic Stirring Water Bath is an integrated laboratory thermal platform engineered for precise temperature regulation and simultaneous multi-vessel magnetic agitation under both ambient and sub-ambient conditions. Unlike conventional water baths, the SHA-6A incorporates a hermetically sealed refrigeration system—enabling stable operation from 0 °C up to 100 °C—making it suitable for applications requiring controlled cooling during chemical synthesis, enzymatic assays, or low-temperature solubility studies. Its core architecture follows the principle of forced convection via an internal circulation pump, ensuring uniform thermal distribution across the entire bath volume. The unit operates on standard 220 V/50 Hz mains power and integrates six independently positioned stirring stations, each driven by a dedicated 25 W brushless DC motor. This design supports parallel experimentation while maintaining mechanical isolation between vessels—a critical requirement in comparative kinetic studies or quality control workflows.

Key Features

• Wide operational temperature range (0 °C to 100 °C) with high-resolution digital PID control (0.1 °C resolution, ±0.5 °C accuracy) and real-time LCD display
• Integrated refrigeration module using R134a refrigerant, enabling stable sub-zero capability without external chillers or ice baths
• Six-position magnetic stirring array with synchronized speed adjustment; no cross-contamination risk due to mechanically decoupled drive units
• Stainless steel inner tank (welded construction) and powder-coated cold-rolled steel housing for corrosion resistance and long-term durability in humid lab environments
• Internal recirculation pump (50 W) enhances thermal homogeneity and reduces gradient-induced experimental variance
• Over-temperature protection, dry-run alarm, and compressor overpressure cutoff ensure compliance with IEC 61010-1 safety standards for laboratory equipment

Sample Compatibility & Compliance

The SHA-6A accommodates standard laboratory glassware—including 50–500 mL beakers and Erlenmeyer flasks—within its 470 × 310 × 180 mm bath chamber. Each stirring position accepts standard PTFE-coated stir bars (6–30 mm length). The stainless steel tank resists degradation from aqueous buffers, mild organic solvents, and saline solutions, supporting protocols aligned with ISO 17025-accredited testing laboratories. While not certified for medical device manufacturing, the unit meets general-purpose requirements for GLP-compliant research environments when operated within specified environmental conditions (ambient temperature: 10–30 °C; relative humidity: ≤80%, non-condensing). Its electrical safety certification conforms to GB 4793.1–2019 (equivalent to IEC 61010-1:2010), and electromagnetic compatibility complies with GB/T 18268.1–2010.

Software & Data Management

The SHA-6A operates via an embedded microcontroller-based interface with no external software dependency. All setpoints, real-time bath temperature, and stirring speed are displayed on a backlit LCD panel. Though the device lacks USB or RS-232 connectivity, its analog control architecture ensures immunity to firmware vulnerabilities and network-related downtime—advantageous in regulated QC labs where validation stability is prioritized over digital integration. For auditability, users may manually log temperature and speed settings alongside experimental timestamps in accordance with internal SOPs. Optional external data loggers (e.g., Omega OM-DAQPRO-5300 series) can be interfaced via 4–20 mA analog output (available upon request with OEM configuration).

Applications

• Multi-batch reaction optimization in synthetic organic chemistry, including hydrolysis, condensation, and polymerization under controlled thermal profiles
• Enzyme kinetics assays requiring simultaneous incubation at varying temperatures with continuous mixing to prevent sedimentation or localized denaturation
• Standardization of dissolution testing per USP , particularly for temperature-sensitive dosage forms requiring precise 37 °C maintenance with agitation
• Preparation of calibration standards in analytical chemistry labs, where homogenization and thermal equilibration must precede HPLC or ICP-MS analysis
• Cooling-assisted crystallization trials in pharmaceutical development, leveraging the unit’s ability to ramp down from 100 °C to 0 °C at programmable rates (via external timer integration)
• Material science studies involving thermal aging of polymer composites or nanosuspensions under shear-stabilized conditions

FAQ

Does the SHA-6A support individual speed control for each stirring station?
No—the six stirring motors operate in synchronized mode via a single potentiometer. Independent speed control is not supported by the base configuration.
Can the unit maintain temperature stability during extended overnight operation?
Yes, provided ambient conditions remain within specification and water level is maintained above 8 cm. The PID algorithm and insulated tank design enable drift of less than ±0.3 °C over 12-hour cycles.
Is deionized water required for operation?
Deionized or distilled water is strongly recommended to minimize mineral buildup on the heater surface and prolong service life of the stainless steel tank.
What is the maximum load capacity per stirring position?
Each station supports up to 500 mL of liquid in standard borosilicate glassware. Total bath volume should not exceed 22 L to ensure optimal circulation and thermal response.
Does the unit comply with FDA 21 CFR Part 11 requirements?
No—the SHA-6A lacks electronic audit trail, user authentication, or electronic signature capabilities. It is intended for research use only and not validated for GMP production environments.