Chengmeng DHZ-LA Advanced Refrigerated Orbital Shaking Incubator with LCD Display

Overview

The Chengmeng DHZ-LA is a high-performance refrigerated orbital shaking incubator engineered for precision-controlled cultivation of microbial, cellular, and biochemical samples under dynamically regulated temperature and agitation conditions. Utilizing a robust thermoelectric cooling system paired with an Embraco imported compressor and forced-air convection with internal baffle-guided airflow, the unit maintains stable thermal environments from 4°C to 60°C—enabling low-temperature fermentation, cold-adapted enzyme studies, and temperature-sensitive cell line expansion. Its orbital shaking mechanism—driven by a brushless DC motor with dual-loop speed and current regulation—delivers consistent 26 mm orbit motion across the full 10–300 rpm range, minimizing shear stress while maximizing oxygen transfer efficiency in liquid cultures. The integrated microprocessor-based PID temperature controller reduces overshoot, shortens stabilization time, and achieves ±0.1°C stability with ±0.5°C uniformity throughout the chamber volume—critical for reproducible growth kinetics and assay consistency.

Key Features

• Refrigerated operation down to 4°C using Embraco compressor and optimized refrigerant circuitry
• Orbital shaking platform with 26 mm fixed-diameter orbit and programmable speed range (10–300 rpm, ±1 rpm accuracy)
• Full 304 stainless steel interior chamber with electrostatically coated cold-rolled steel exterior
• Intelligent door interlock: automatic pause on lid opening; immediate resumption upon closure
• Power-fail memory function with auto-restart capability preserving user-defined protocols
• Comprehensive fault diagnostics including temperature sensor failure, motor stall, Hall sensor error, DC bus over/under-voltage, and serial communication interruption
• LCD interface supporting simultaneous display of setpoint/actual temperature, speed, timer, and operational status
• Integrated 8 W LED illumination and 8 W UV-C sterilization lamp, both controllable via touchscreen
• Adjustable levelling feet and heavy-duty casters for ergonomic positioning and mobility
• USB port (optional) for protocol export and firmware updates; built-in EMI filter ring for electromagnetic noise suppression

Sample Compatibility & Compliance

The DHZ-LA accommodates diverse vessel configurations through its standardized 900 × 550 mm platform, supporting up to 60 × 250 mL flasks, 40 × 500 mL, 24 × 1000 mL, 15 × 2000 mL, or 8 × 3000/5000 mL containers using rigid 304 stainless steel clamps (weld-free, injection-molded construction). Customizable spring shelves are available for irregular or multi-format tube racks. Designed for GLP-compliant laboratories, the instrument supports audit-ready operation through deterministic timer logging (0–9999 min), non-volatile parameter storage, and hardware-enforced safety thresholds. While not pre-certified to ISO/IEC 17025 or FDA 21 CFR Part 11, its architecture—including persistent memory, alarm event logging, and hardware interlocks—aligns with foundational requirements for regulated bioprocess validation and QC workflows in pharmaceutical, academic, and contract research settings.

Software & Data Management

The DHZ-LA operates without external software dependency, relying instead on embedded firmware with real-time parameter monitoring and local event logging. All operational parameters—including temperature setpoint, actual chamber reading, speed setpoint, measured rpm, elapsed time, and active alarms—are continuously updated on the backlit LCD interface. Optional USB connectivity enables periodic export of session logs (timestamped temperature/speed/time records) in CSV format for traceability and trend analysis. The control firmware implements watchdog timers, cyclic redundancy checks (CRC) on critical configuration registers, and write-protection for factory calibration constants—ensuring long-term reliability and data integrity across extended unattended runs typical in overnight bacterial culture or recombinant protein expression experiments.

Applications

• Microbial fermentation optimization (e.g., E. coli, Bacillus subtilis, yeast strains) under controlled hypothermic or mesophilic conditions
• Citric acid and organic acid production process development requiring precise dissolved oxygen modulation
• Molecular biology applications including plasmid amplification, phage propagation, and competent cell preparation
• Mammalian and insect cell suspension culture at reduced temperatures to mitigate metabolic stress
• Environmental microbiology studies involving psychrotolerant isolates or cold-shock response profiling
• Enzyme activity assays where thermal stability and mixing homogeneity directly influence kinetic measurements
• Antibiotic susceptibility testing using broth microdilution formats requiring consistent agitation and temperature maintenance

FAQ

What is the lowest operating temperature achievable with this unit?
The DHZ-LA maintains stable operation down to 4°C under standard ambient conditions (25°C); performance below this threshold is not specified due to compressor thermodynamic limits.
Is the shaking platform configurable for different orbit diameters?
No—the mechanical design fixes the orbit diameter at 26 mm to ensure mechanical resonance avoidance and long-term bearing integrity; amplitude variation is not supported.
Can the unit be validated for GMP environments?
While the DHZ-LA includes features aligned with GMP principles (alarm logging, parameter persistence, hardware interlocks), formal qualification (IQ/OQ/PQ) requires site-specific protocols and third-party verification per ICH Q5C and EU Annex 15 guidelines.
Does the UV lamp provide validated microbial reduction efficacy?
The 8 W UV-C lamp is intended for routine surface decontamination between runs; users must validate log-reduction performance against target organisms (e.g., Bacillus atrophaeus) using biodosimetry per ISO 15714.
Are spare clamps and trays available as consumables?
Yes—standard 304 stainless steel clamps, universal spring shelves, and custom-sized trays are available as optional accessories with documented material certifications (EN 10088-1).