DRETOP SSK-4030H Water-Bath Constant-Temperature Orbital Shaker

Overview

The DRETOP SSK-4030H is a precision-engineered water-bath constant-temperature orbital shaker designed for controlled agitation and thermal regulation of liquid-phase biological and biochemical samples. It integrates a thermostatically regulated water bath with a high-stability orbital oscillation mechanism—operating on the principle of uniform circular motion (orbital shaking)—to ensure consistent mixing, enhanced mass transfer, and optimal oxygenation in suspension cultures. Unlike air-jacketed shakers, the water-bath design provides superior temperature homogeneity across the entire sample volume, minimizing thermal gradients that can compromise cell viability, enzyme kinetics, or microbial growth reproducibility. This instrument is engineered for long-duration, unattended operation under laboratory conditions compliant with GLP (Good Laboratory Practice) and ISO/IEC 17025 requirements, supporting standardized protocols in microbiology, molecular biology, fermentation studies, and pharmaceutical stability testing.

Key Features

• High-fidelity PID temperature control using Pt100 platinum resistance sensors, delivering ±0.1°C setpoint accuracy and ±0.5°C uniformity at 25°C across the water bath;
• Orbital oscillation mode with continuously adjustable speed from 50 to 300 rpm and fixed 26 mm amplitude, enabling precise tuning for sensitive cell lines, fragile recombinant proteins, or viscous culture media;
• DC brushless motor drive—eliminating carbon brush wear, reducing electromagnetic interference, and ensuring low-noise (20,000 hours MTBF;
• Full-function LED-LCD interface displaying real-time temperature, speed, remaining time, and system status; supports parameter lock, offset calibration, and user-defined PID coefficient adjustment;
• Robust 304 stainless steel water bath chamber and lid, corrosion-resistant and autoclavable-compatible for sterile workflow integration; electrostatically coated steel housing for durability and chemical resistance;
• Power-loss memory function retains all active settings—including temperature, speed, and timer—upon unexpected shutdown, resuming operation automatically after power restoration without manual reconfiguration.

Sample Compatibility & Compliance

The SSK-4030H accommodates standard laboratory vessels via its universal spring-clamp tray (400 × 300 mm), including Erlenmeyer flasks (up to 12 × 250 mL), test tubes, centrifuge tubes, and custom bioreactor vessels with compatible footprints. Its water-bath geometry ensures full immersion of vessel bases, facilitating uniform heat exchange and eliminating edge-cooling effects common in dry-block shakers. The unit complies with IEC 61010-1:2010 safety standards for electrical equipment used in laboratory environments. While not certified for IVD or GMP manufacturing use out-of-the-box, its logging-capable firmware architecture supports retrospective validation for FDA 21 CFR Part 11–aligned audit trails when integrated with validated third-party data acquisition systems. Temperature and timing parameters meet ASTM E2917–22 criteria for thermal stability assessment in incubation devices.

Software & Data Management

The SSK-4030H operates as a standalone instrument with embedded microcontroller-based firmware—no external PC or proprietary software required for basic operation. All operational parameters are stored in non-volatile EEPROM with timestamped event logging (e.g., temperature deviation alerts, motor start/stop cycles, power interruption records). Optional RS-485 serial interface (available upon request) enables integration into centralized lab automation networks using Modbus RTU protocol for remote monitoring and scheduled parameter updates. Data export requires external terminal emulation or SCADA-level middleware; raw logs adhere to ISO/IEC 11172-3-compliant ASCII formatting for traceability and CSV conversion. No cloud connectivity or proprietary cloud services are implemented—ensuring data sovereignty and alignment with institutional IT security policies.

Applications

• Microbial culture expansion (E. coli, yeast, bacilli) under controlled aeration and thermal conditions;
• Mammalian and insect cell line propagation in serum-containing or serum-free media;
• Enzyme activity assays requiring precise thermal stabilization during kinetic measurements;
• Solubility and dissolution profiling of APIs in pharmaceutical development;
• Environmental sample enrichment (e.g., waterborne pathogen recovery, soil extract agitation);
• Antibiotic susceptibility testing (AST) and minimum inhibitory concentration (MIC) determination per CLSI M07-A11 guidelines.

FAQ

Is the SSK-4030H suitable for anaerobic culture applications?

Yes—when operated with sealed vessels and inert gas overlay (e.g., N₂ or CO₂), the water-bath environment minimizes evaporation and maintains headspace integrity longer than air-shaker alternatives.
Can the oscillation mode be switched to reciprocating motion?

No—the SSK-4030H is configured exclusively for orbital (circular) motion. For dual-mode capability (orbital + reciprocating), consider the SSK-4030WH variant.
What is the maximum permissible load weight on the tray?

The spring-clamp platform supports up to 8 kg distributed load; exceeding this may degrade amplitude consistency and accelerate mechanical fatigue.
Does the unit include calibration documentation?

A factory-issued calibration certificate (traceable to NIM, China) is provided with each shipment, covering temperature sensor and timer verification at 37°C and 200 rpm.
Is the water bath drain valve included as standard equipment?

Yes—a front-mounted brass drain valve with quick-release fitting is integrated into the base pan for efficient bath fluid exchange and cleaning.