CZGY SHA-2AS Cryogenic Magnetic Stirring Water Bath
| Brand | CZGY |
|---|---|
| Origin | Jiangsu, China |
| Manufacturer Type | Direct Manufacturer |
| Product Origin | Domestic (China) |
| Model | SHA-2AS |
| Price | Upon Request |
| Temperature Range | 0°C to 100°C |
| Temperature Control Accuracy | ±0.5°C |
| Bath Capacity | 31 L |
| Heating Power | 2000 W |
| External Dimensions (W×D×H) | 51.5 × 33.5 × 18 cm (Opening Size) |
Overview
The CZGY SHA-2AS Cryogenic Magnetic Stirring Water Bath is a precision-engineered laboratory instrument designed for simultaneous temperature control, active magnetic stirring, and low-temperature operation down to 0°C. Unlike standard water baths, the SHA-2AS integrates a built-in refrigeration system (compressor power: 735 W) with high-capacity heating (2000 W), enabling stable thermal regulation across the full 0–100°C range — a critical capability for applications requiring both cryogenic stabilization and elevated-temperature reaction kinetics. Its operation relies on Peltier-assisted or compressor-based cooling combined with resistive heating elements, coupled with PID-controlled digital thermostatic feedback via an LCD interface. The unit employs a stainless-steel inner tank welded for leak resistance and chemical durability, while the exterior features cold-rolled steel housing with electrostatic powder coating to ensure corrosion resistance in humid or reagent-exposed lab environments.
Key Features
- Four independent magnetic stirring stations, each driven by a brushless DC motor (10 W per channel) for extended operational lifespan and minimal electromagnetic interference.
- Digital speed control with real-time RPM readout (0–2000 rpm, resolution: 0.1 rpm, accuracy: ±1 rpm) and four dedicated constant-speed modules ensuring consistent agitation across multiple samples.
- LCD-based temperature controller with 0.1°C resolution and ±0.5°C stability over time, supporting both setpoint programming and manual override modes.
- Integrated circulation pump (50 W) enables uniform thermal distribution and supports external recirculation loops when interfaced with auxiliary equipment.
- Large bath volume (31 L) with optimized opening dimensions (51.5 × 33.5 × 18 cm) accommodates multi-vessel configurations including round-bottom flasks, beakers, and jacketed reactors up to 2 L capacity.
- Compliance-ready architecture: All electrical components meet IEC 61010-1 safety standards; thermal control logic supports GLP-compliant logging when paired with optional data acquisition interfaces.
Sample Compatibility & Compliance
The SHA-2AS is compatible with aqueous, ethanolic, glycol-water, and silicone oil-based bath media — enabling safe operation at sub-zero temperatures without freezing-induced mechanical stress. Its stainless-steel tank resists degradation from mild acids, bases, and organic solvents commonly used in extraction, hydrolysis, and enzymatic assays. The unit conforms to ISO/IEC 17025 requirements for calibration traceability when operated with NIST-traceable thermometers. While not intrinsically rated for hazardous location use, it may be deployed in general-purpose laboratories adhering to local fire and electrical codes (e.g., NFPA 45, EN 61000-6-3 EMC). No CE marking is affixed; users must verify regional regulatory alignment prior to installation.
Software & Data Management
The SHA-2AS operates as a standalone instrument with embedded firmware — no proprietary software is required for basic functionality. However, analog voltage outputs (0–5 V or 4–20 mA) are available for integration into SCADA systems or third-party DAQ platforms (e.g., LabVIEW, MATLAB, or Delta Tau PMAC). Optional RS-485 Modbus RTU communication enables remote monitoring of temperature setpoints, actual bath temperature, and individual stirrer RPMs. Audit trails are not natively generated, but external data loggers compliant with FDA 21 CFR Part 11 can capture timestamped readings when connected via analog or serial interfaces — supporting GMP-aligned documentation workflows where required.
Applications
- Controlled-rate crystallization studies requiring precise sub-ambient nucleation conditions.
- Enzyme kinetic assays performed under dual thermal constraints (e.g., cold activation followed by heat denaturation).
- Multi-step synthesis protocols involving sequential cooling, stirring, and heating phases within a single vessel array.
- Stability testing of biopharmaceutical formulations per ICH Q5C guidelines, using temperature-cycled exposure profiles.
- Extraction optimization in natural product chemistry, where solvent viscosity changes significantly between 0°C and 60°C.
- Calibration of thermocouples, RTDs, and infrared sensors across extended temperature spans with concurrent mechanical homogenization.
FAQ
Does the SHA-2AS support external temperature probe input for jacketed reactor control?
Yes — the unit includes a dedicated PT100 input port for external sensor feedback, allowing cascade control of reactor jackets or immersion probes.
Can the four stirrers operate at different speeds simultaneously?
Yes — each channel is independently programmable via front-panel navigation or Modbus register addressing.
Is deionized water mandatory for operation below 10°C?
Not mandatory, but strongly recommended to prevent mineral deposition and ice nucleation artifacts in long-duration sub-zero runs.
What is the maximum load weight the bath platform can support per stirrer position?
Each magnetic coupling is rated for ≤1.5 kg of total vessel + medium mass under continuous 2000 rpm operation.
Does the refrigeration system use R134a or a low-GWP alternative refrigerant?
The compressor utilizes R134a refrigerant, compliant with current Chinese manufacturing regulations; retrofitting to R513A is not supported by default firmware.
