CZGY ZD-85 Air-Bath Constant-Temperature Orbital & Reciprocal Shaker

Overview

The CZGY ZD-85 Air-Bath Constant-Temperature Orbital & Reciprocal Shaker is an integrated benchtop bioprocessing instrument engineered for precise temperature-controlled agitation of biological and biochemical samples. Unlike water-bath shakers, this air-bath design employs forced-air convection heating and a high-efficiency aluminum alloy chamber to deliver rapid thermal equilibration and uniform temperature distribution across the oscillating platform. Its dual-mode operation—selectable orbital or reciprocal motion—enables flexible adaptation to diverse culturing requirements, including microbial suspension culture, enzyme reaction kinetics, cell dissociation, and reagent mixing under controlled thermal conditions. The device operates on the principle of motor-driven eccentric shaft transmission, coupled with a digitally regulated PID temperature controller and a brushless DC motor for low-noise, long-life rotational stability. Designed for routine use in academic life science laboratories, QC microbiology units, and biopharmaceutical process development labs, it complies with fundamental mechanical safety and electromagnetic compatibility standards (IEC 61010-1) and supports GLP-aligned documentation practices through deterministic timer and setpoint logging.

Key Features

• Dual oscillation modes: user-selectable orbital (circular) or reciprocal (linear back-and-forth) motion via front-panel toggle switch
• PID digital temperature control system with ±0.5 °C accuracy across 0–50 °C range; real-time display of both setpoint and actual chamber temperature
• Stepless speed regulation from 0 to 300 rpm using precision potentiometer; smooth acceleration/deceleration minimizes sample splashing and tube displacement
• 20 mm fixed amplitude optimized for standard Erlenmeyer flasks, test tubes (up to φ16 × 300 mm), and culture bottles (e.g., 100 mL × 24 or 200 mL × 15 per load)
• Single-tier reinforced aluminum platform (480 × 420 mm internal dimension) with universal spring-loaded clamping rack for secure, vibration-dampened sample retention
• Mechanical timer with 0–120 minute range; auto-shutdown function ensures protocol reproducibility and energy efficiency
• Integrated axial cooling fan prevents motor overheating during extended operation; accessible dust filter for routine maintenance
• Robust steel frame with powder-coated finish; compact footprint (700 × 470 × 450 mm) suitable for standard laboratory benches

Sample Compatibility & Compliance

The ZD-85 accommodates common labware used in aerobic microbial cultivation, protein expression, and immunoassay preparation—including glass and polypropylene culture tubes, baffled flasks (125–500 mL), and multi-well plates secured via optional adapter kits. Its ambient-to-50 °C operating envelope meets typical requirements for mesophilic bacterial growth (e.g., E. coli, Bacillus subtilis), yeast fermentation, and antibody incubation protocols. While not certified for IEC 61331-1 (radiation protection) or ISO 13485 (medical device QMS), the unit conforms to general-purpose laboratory equipment safety norms per IEC 61010-1:2010 and EMC Directive 2014/30/EU. It supports audit-ready workflows when paired with external loggers for temperature and RPM validation—common practice in ISO/IEC 17025-accredited testing labs and FDA-regulated environments where equipment qualification (IQ/OQ) is required.

Software & Data Management

The ZD-85 operates as a standalone analog-digital hybrid instrument with no embedded firmware or network interface. All operational parameters—temperature setpoint, timer duration, oscillation mode, and speed—are configured manually via tactile controls and displayed on a dual-line LED screen. Though lacking USB or RS-232 connectivity, its deterministic mechanical timer and stable thermal response enable full traceability when documented alongside lab notebooks or LIMS entries. For users requiring electronic data capture, third-party temperature/RPM data loggers (e.g., Omega OM-DAQPRO-5300 series) can be mounted adjacent to the chamber for synchronized recording—facilitating compliance with 21 CFR Part 11 principles when combined with appropriate procedural controls and audit trails.

Applications

• Aerobic cultivation of bacteria, fungi, and algae in liquid media
• Induction and harvesting of recombinant proteins in shake-flask bioreactors
• Antibody-antigen binding assays requiring consistent thermal agitation
• Suspension cell culture for mammalian or insect cell lines (with appropriate CO₂-compatible enclosure)
• Extraction and homogenization of plant tissues or environmental samples
• Standardization of microbial inoculum density prior to plating or MIC determination
• Pre-incubation steps in ELISA, PCR setup, and chromatin immunoprecipitation (ChIP) workflows

FAQ

What is the maximum flask size supported on the ZD-85 platform?
The internal chamber accommodates up to twenty-four 100 mL Erlenmeyer flasks or fifteen 200 mL flasks. Larger vessels may be used if total load remains balanced and does not exceed the platform’s 15 kg static capacity.
Can the ZD-85 operate continuously for 72 hours or longer?
Yes—continuous operation is permitted provided ambient temperature remains below 30 °C, ventilation is unobstructed, and preventive maintenance (e.g., bearing lubrication every 6 months) is performed per the manual.
Is the temperature calibration traceable to NIST standards?
The unit ships with factory calibration verified against reference thermistors. End-user recalibration requires a calibrated external thermometer and adjustment via internal trimpot; documentation of such procedures satisfies ISO/IEC 17025 clause 6.5.2 for in-house verification.
Does the shaker support both clockwise and counterclockwise orbital rotation?
No—the orbital mode rotates unidirectionally (clockwise only) at all speeds; directional reversal is not implemented in the drive mechanism.
What maintenance intervals are recommended for long-term reliability?
Inspect fan filters and motor housing quarterly; re-lubricate drive bearings every 6 months using #1 calcium-sodium grease; verify thermal fuse integrity annually; replace timing belt if cracking or slippage is observed.