ZWFR-211 Horizontal Constant-Temperature Orbital Shaker with Touchscreen Color LCD

Overview

The ZWFR-211 Horizontal Constant-Temperature Orbital Shaker is an engineered platform for precision-controlled incubation and agitation of biological samples under tightly regulated thermal and mechanical conditions. Designed for laboratories requiring high reproducibility in microbial culture, protein expression, enzyme kinetics, and cell-based assays, the instrument integrates orbital shaking dynamics with active refrigeration and PID-driven temperature regulation. Its horizontal configuration provides optimal spatial efficiency and uniform heat distribution across large-capacity flasks—particularly advantageous for aerobic fermentation, suspension cell expansion, and high-yield recombinant protein production. The system operates on a cam-driven track mechanism ensuring consistent orbital motion (Φ0–50 mm adjustable amplitude) with minimal vibration transmission, while the forced-air convection system—combined with mirror-polished stainless-steel interior walls—ensures rapid thermal equilibration and ≤±1.0 °C uniformity at 37 °C. Unlike basic shakers, the ZWFR-211 embeds environmental scanning microprocessor logic that continuously monitors ambient drift, load mass variation, and refrigeration duty cycle to dynamically adjust heating/cooling output—meeting critical requirements for GLP-compliant bioprocess development and QC release testing.

Key Features

• 7-inch full-color TFT touchscreen interface with intuitive Chinese-language graphical UI, animated status feedback, and multi-level parameter encryption
• PID control algorithm with real-time environmental scan compensation for enhanced thermal stability (≤±0.1 °C fluctuation at setpoint)
• Programmable ramp-soak protocols: up to 6 segments × 12 steps, supporting temperature gradients, cyclic incubation, and stepwise speed transitions
• Dual independent over-temperature protection circuits—one fixed (105 °C), one user-adjustable—with hardware-level cutoff independent of main controller
• Comprehensive safety architecture: door-interlock shutdown, low-water auto-shutoff, leakage current detection, compressor overload monitoring, and sensor fault diagnostics
• Brushless AC induction motor delivering constant torque from 30–240 rpm with ±1 rpm speed accuracy and zero maintenance requirement
• Frost-free R134a refrigeration system with adaptive load compensation—enabling stable sub-ambient operation down to 4 °C without manual defrost cycles
• Electro-polished stainless-steel chamber and tray, powder-coated steel exterior, and tempered glass viewing window for corrosion resistance and long-term reliability

Sample Compatibility & Compliance

The ZWFR-211 accommodates diverse vessel formats via its 896 × 530 mm platform, supporting configurations up to 45 × 250 mL Erlenmeyer flasks or 6 × 3000 mL carboys. Its wide orbit range (Φ0–50 mm) and programmable acceleration profiles prevent splashing and foam formation during high-speed cultivation of sensitive cultures. The unit complies with IEC 61010-1:2010 for laboratory equipment safety and meets electromagnetic compatibility standards per EN 61326-1. While not certified for ISO 13485 or FDA 21 CFR Part 11 out-of-the-box, its embedded RS-232 interface, audit-trail-capable parameter memory, and power-fail recovery functionality support integration into validated workflows under GMP/GLP frameworks when paired with appropriate data management software. All safety-critical functions—including temperature deviation alarms, motor stall detection, and refrigerant pressure monitoring—are implemented via redundant hardware circuits, satisfying risk mitigation requirements outlined in ISO 14971.

Software & Data Management

Data integrity is maintained through multiple synchronized layers: real-time parameter logging (temperature, speed, time, alarm events) stored in non-volatile memory; timestamped thermal printouts via integrated thermal mini-printer; and serial export capability via RS-232 to external PCs or LIMS. The system retains up to 100 user-defined programs with encrypted access control, preventing unauthorized modification of validated protocols. All calibration offsets (temperature, speed) are stored separately and require administrative password entry—supporting traceability per ISO/IEC 17025 clause 7.6. Power interruption handling includes automatic resume-from-interrupt with preserved elapsed time and stage index, eliminating need for manual reinitialization post-outage. Firmware updates are performed via USB port with version-locking to ensure revision control during method transfers between instruments.

Applications

The ZWFR-211 serves as a core platform in academic research labs conducting bacterial growth kinetics (e.g., E. coli expression optimization), mammalian suspension culture (CHO, HEK293), yeast fermentation (S. cerevisiae, P. pastoris), and enzymatic bioconversion studies. In pharmaceutical QA/QC environments, it supports media fill simulations, stability-indicating assay development, and extractables/leachables sample agitation per USP <661>. Food safety labs utilize its precise temperature ramping for accelerated shelf-life modeling of probiotic cultures; environmental microbiology units deploy it for BOD bottle agitation per ASTM D5210. Its capacity to maintain 4 °C with active cooling enables cold-adapted enzyme assays and RNA stabilization workflows—functions rarely supported by standard heated-only shakers.

FAQ

Does the ZWFR-211 support remote monitoring or Ethernet connectivity?
No—this model features only RS-232 serial communication. Ethernet or Wi-Fi modules are not available as factory options.
Can the internal printer be disabled to reduce maintenance overhead?
Yes—the thermal printer can be deactivated via system menu; all logs remain accessible via RS-232 export.
Is the refrigeration system suitable for continuous operation at 4 °C in ambient temperatures above 25 °C?
No—the specified ambient operating range is strictly 5–25 °C. Operation outside this range may compromise cooling capacity and thermal uniformity.
Are third-party flask clamps or custom trays compatible with the ZWFR-211 platform?
Yes—the 896 × 530 mm deck accepts ISO-standard universal clamp kits and OEM-certified accessory trays (e.g., microplate holders, tube racks).
What documentation is provided for IQ/OQ validation support?
A comprehensive User Requirements Specification (URS) template, Factory Acceptance Test (FAT) report, and blank Installation/Operational Qualification checklists are included with shipment.