Zhongwei ZWY-C211D Horizontal Orbital Programmable Incubator Shaker with Temperature and Humidity Control

Overview

The Zhongwei ZWY-C211D is a horizontal orbital incubator shaker engineered for precision-controlled microbial cultivation, enzymatic assays, cell-based bioprocessing, and long-term humidity-sensitive biological experiments. It integrates PID-controlled temperature regulation, microprocessor-driven humidity management, and programmable orbital agitation within a single robust stainless-steel chamber. Unlike standard shakers, the ZWY-C211D employs forced-air convection with dual independent heating and refrigeration circuits (R134a-based, frost-free), enabling stable thermal environments across the full 4–60 °C range—even under dynamic load conditions. Its humidity system utilizes an internally mounted, patent-pending ultrasonic humidifier with auto-refill capability and real-time water-level monitoring, maintaining consistent 45–90 %RH performance without condensation or localized dry zones. The device operates on a true orbital motion profile (Φ26 mm), minimizing shear stress on sensitive suspension cultures while ensuring homogeneous mixing—critical for aerobic bacterial growth, yeast fermentation, and hybridoma expansion.

Key Features

• 6-segment × 12-step programmable controller supporting multi-stage temperature/humidity ramps, stepwise speed transitions, and repeat-cycle protocols—including temperature stepping, humidity stepping, and combined thermo-hygrometric gradients
• Large backlit LCD display showing real-time setpoints and measured values for temperature, humidity, speed, elapsed time, and alarm status—with intuitive navigation and parameter locking
• Dual safety architecture: hardware-independent overtemperature cutoff (adjustable), over-speed limiter, leakage current protection, compressor overload safeguard, and independent overheat prevention circuitry
• Intelligent water management: capacitive low-water detection triggers audible/visual alerts and initiates automatic refill from external reservoir—eliminating manual intervention during unattended runs
• Brushless AC induction motor with constant-torque output across 30–300 rpm; smooth ramp-up acceleration prevents sample splashing and ensures reproducible cell pellet formation
• Electro-polished 304 stainless steel interior, tempered glass front door with foot-activated opening mechanism, and powder-coated steel chassis for corrosion resistance and cleanroom compatibility
• RS-232 serial port enables integration with LIMS or laboratory automation systems; embedded thermal printer provides traceable hardcopy logs compliant with GLP documentation requirements

Sample Compatibility & Compliance

The ZWY-C211D accommodates standard microbiological and molecular biology vessels—including Erlenmeyer flasks (up to 5 L), culture bottles, deep-well plates, and roller bottles—on its single 940 × 584 mm stainless steel platform. Its uniform airflow distribution and high-humidity retention make it suitable for moisture-vulnerable applications such as fungal sporulation studies, mycelial biomass production, and protein expression in humidity-sensitive E. coli strains. From a regulatory standpoint, the instrument conforms to IEC 61010-1 for laboratory equipment safety and incorporates design elements aligned with FDA 21 CFR Part 11 expectations—specifically audit-trail-capable parameter logging, user-access controls via password encryption, and non-volatile memory for protocol persistence after power loss. While not certified for ISO 13485 or GMP manufacturing use out-of-the-box, its operational repeatability and environmental fidelity support validation under ASTM E2500 and USP <1058> analytical instrument qualification frameworks.

Software & Data Management

Data acquisition and reporting are managed through the integrated microcontroller firmware—not via external PC software—ensuring deterministic timing and immunity to host-system interruptions. All user-defined programs, calibration offsets (temperature/humidity/speed), and runtime logs are stored in EEPROM with write-protection options. The RS-232 interface supports ASCII command protocol for remote start/stop, setpoint adjustment, and log export; compatible with third-party SCADA platforms or custom Python/Matlab scripts using standard serial communication libraries. Printed output includes timestamped entries of all active parameters, alarm events, and cycle completion markers—formatted to meet internal QA record-keeping standards. Optional firmware updates (delivered via USB-to-serial adapter) maintain backward compatibility while adding minor feature enhancements—no proprietary drivers or cloud dependencies required.

Applications

• Microbial growth kinetics under controlled hygrothermal conditions (e.g., Aspergillus niger citric acid production, Pseudomonas aeruginosa biofilm development)
• Recombinant protein expression in humidity-sensitive BL21(DE3) derivatives requiring stable RH to prevent media crystallization
• Enzyme activity assays where hydration state affects conformational stability (e.g., lipases, cellulases)
• Cell line maintenance for hybridoma or CHO cultures exhibiting RH-dependent viability profiles
• Environmental simulation studies—such as soil microbiome response to climate-variable moisture regimes
• Pharmaceutical stability testing per ICH Q1A(R2) guidelines, particularly for lyophilized intermediates undergoing rehydration-phase agitation

FAQ

Does the ZWY-C211D support CO₂ control?
No—the ZWY-C211D model does not include CO₂ sensing or gas blending capabilities. For CO₂-integrated operation, consider the ZWY-D series variant.
Can the unit operate continuously for 72+ hours without intervention?
Yes—its auto-refill humidification system, redundant thermal safeguards, and uninterruptible power recovery logic enable fully autonomous extended runs when connected to a stable utility supply.
Is the chamber volume usable for stacked vessels?
The 305 L internal volume refers to the total cavity space; however, only one adjustable shelf is provided. Stacking requires compatible auxiliary racks (sold separately) and must preserve ≥50 mm clearance above vessels for laminar airflow.
What calibration certificates are supplied?
Factory calibration reports for temperature (NIST-traceable Pt100 sensor) and humidity (capacitive RH probe) are included. On-site verification tools (e.g., calibrated hygrometer kits) are recommended annually per ISO/IEC 17025 guidance.
How is firmware updated?
Firmware upgrades are performed via UART connection using a standard USB-to-TTL adapter and vendor-supplied hex files—no internet connectivity or subscription service required.