Yiheng DKZ Series Low-Temperature / Constant-Temperature Orbital Shaking Water Bath

Overview

The Yiheng DKZ Series Low-Temperature / Constant-Temperature Orbital Shaking Water Bath is an engineered platform for precise thermal control and uniform orbital agitation in life science and analytical laboratories. Designed around a dual-function architecture—integrating Peltier-assisted cooling (in low-temperature variants) and high-efficiency resistive heating with PID-controlled feedback—the system maintains stable setpoint temperatures across the full operational range. Orbital shaking is achieved via a brushless DC motor coupled to a balanced eccentric drive mechanism, delivering consistent motion without mechanical drift or harmonic resonance. This configuration supports applications requiring both thermally sensitive incubation and controlled mixing, including microbial culture expansion, enzymatic assays, hybridization protocols, and kinetic studies where temperature-dependent reaction rates must be decoupled from shear-induced denaturation.

Key Features

• Programmable temperature control with 0.1°C resolution and ±0.1°C uniformity across the chamber volume, verified under ISO/IEC 17025-aligned calibration conditions (20°C ambient, 50% RH, no load).
• Adjustable orbital oscillation frequency (30–150 rpm) and amplitude (30–40 mm), enabling optimization for suspension cultures, immunoassay plate washing, or gentle tissue homogenization.
• Stainless steel construction for corrosion resistance and long-term stability—full stainless steel inner chamber and outer casing standard on DKZ-2B and DKZ-3B models.
• Intuitive digital interface with real-time display of setpoint, actual temperature, and current oscillation speed; memory function retains last-used parameters after power cycling.
• Over-temperature and motor overload protection circuits compliant with IEC 61010-1 safety standards for laboratory equipment.
• Modular tray design accommodates standard Erlenmeyer flasks (50–1000 mL), test tubes, microplates, and custom sample holders without tooling.

Sample Compatibility & Compliance

The DKZ series accommodates aqueous and low-viscosity organic media (e.g., glycerol-water mixtures up to 30% v/v) within its specified temperature envelope. It is suitable for use with glass, polypropylene, and polycarbonate vessels rated for continuous immersion at elevated temperatures. The system meets general requirements for GLP-compliant environments when operated with documented SOPs and periodic verification per ASTM E2207 (“Standard Practice for Calibration of Laboratory Equipment”). While not intrinsically certified for FDA 21 CFR Part 11 compliance, audit trails and parameter logs can be generated externally via optional RS-232/USB data export for integration into validated LIMS or ELN platforms.

Software & Data Management

The DKZ series operates as a standalone instrument with embedded firmware; no proprietary software installation is required for basic operation. Optional communication modules (RS-232 or USB-to-serial) enable remote parameter setting, real-time data streaming (temperature and rpm), and time-stamped logging at user-defined intervals (1–60 s). Exported CSV files are compatible with MATLAB, Python (pandas), and industry-standard statistical analysis tools. Firmware updates are distributed via Yiheng’s secure technical support portal and require manual initiation to preserve configuration integrity in regulated workflows.

Applications

• Bacterial and yeast cultivation under controlled thermal and agitation conditions for growth curve analysis and bioreactor seed train development.
• Enzyme kinetics experiments requiring simultaneous temperature ramping and mixing to minimize boundary layer effects during substrate binding.
• Nucleic acid hybridization (e.g., Southern/Northern blotting) where uniform buffer exchange and temperature maintenance directly impact probe specificity.
• Chemical synthesis of temperature-sensitive metal-organic frameworks (MOFs) and nanoparticle precursors requiring extended reaction times with homogeneous mass transfer.
• Cell-based assays involving suspension-adapted mammalian lines (e.g., CHO, HEK293) where orbital motion improves nutrient diffusion without introducing damaging shear stress.

FAQ

What is the lowest achievable temperature for the DKZ-2B model?

The DKZ-2B operates within a range of 10–99°C; it does not provide sub-ambient cooling. For true low-temperature capability (e.g., 4°C or below), a dedicated refrigerated shaking incubator is recommended.
Can the DKZ series be used with oil as a heat-transfer medium?

No. The system is designed exclusively for aqueous solutions and water-miscible fluids. Oil use may impair thermal sensor accuracy, accelerate seal degradation, and void warranty coverage.
Is the oscillation motion truly orbital, or is it reciprocating?

The DKZ series employs a true orbital motion profile (circular path, no linear back-and-forth component), minimizing splashing and ensuring laminar fluid displacement ideal for fragile biological samples.
How often should temperature uniformity be verified in a GxP environment?

Per ASTM E2207 and internal quality protocols, verification should occur at installation, after relocation, following major maintenance, and at least quarterly during routine operation using NIST-traceable probes.
Are replacement trays or custom platform inserts available?

Yes. Yiheng offers standardized flask clamps (for 125–1000 mL vessels) and universal microplate adapters. Custom CNC-machined platforms can be commissioned through OEM engineering services with lead time documentation provided prior to order confirmation.