DRETOP TD-540WHS Digital Variable-Speed Orbital-Shaker Platform
| Brand | DRETOP |
|---|---|
| Origin | Shanghai, China |
| Model | TD-540WHS |
| Timer Range | 0–999 min |
| Oscillation Speed | 0–300 rpm |
| Oscillation Amplitude | 20 mm |
| Temperature Control | None |
| Tray Quantity | 1 |
| Drive Type | Single-axis orbital-shaker platform |
| Power Supply | AC 220 V, 50 Hz |
| Rated Power | 200 W |
| Tray Dimensions | 540 × 300 mm (spring-loaded) |
| Max Load Capacity | 12 × 250 mL Erlenmeyer flasks |
| Speed Accuracy | ±1 rpm |
| Enclosure Dimensions | 750 × 500 × 330 mm (W×D×H) |
Overview
The DRETOP TD-540WHS is a digital variable-speed orbital shaker platform engineered for reproducible, low-noise agitation of biological and biochemical samples in non-temperature-controlled environments. It operates on the principle of orbital motion—generating consistent circular displacement with a fixed 20 mm amplitude—to ensure uniform suspension, aeration, and mixing across liquid cultures, cell suspensions, and solid-phase reaction mixtures. Designed for laboratories requiring robust, maintenance-free operation without thermal regulation, the TD-540WHS serves as a core platform for microbiological cultivation, enzyme assays, solubility studies, and reagent homogenization where precise mechanical agitation—not temperature control—is the primary experimental requirement.
Key Features
- Single-axis orbital drive system with balanced mechanical architecture, minimizing vibration transmission and acoustic emissions (<55 dB at 1 m distance under typical load conditions).
- Digital LED display with dual independent potentiometer controls for real-time adjustment of speed (0–300 rpm) and timer (0–999 min), enabling intuitive parameter setting without menu navigation.
- Non-contact AC induction motor with brushless design—eliminates carbon brush wear, ensures long-term torque stability, and supports continuous-duty operation across the full speed range.
- Intelligent microprocessor controller with built-in environmental scan logic, delivering responsive speed regulation and automatic recovery from transient power interruptions.
- Dedicated soft-start circuitry ensures gradual acceleration to target rpm, preventing splashing or sediment disruption during initiation of culture agitation.
- Overheat protection circuit monitors motor winding temperature; triggers audible/visual alarm and cuts power if thermal thresholds are exceeded—compliant with IEC 61000-6-2 electromagnetic immunity standards.
- Memory retention function stores last-used speed and time settings, reducing setup time between sequential experiments.
Sample Compatibility & Compliance
The TD-540WHS accommodates standard laboratory vessels including Erlenmeyer flasks (up to 12 × 250 mL), test tubes, petri dishes, and multi-well plates via its spring-loaded 540 × 300 mm platform. Its open-loop orbital configuration supports heterogeneous sample types—from viscous bacterial broths to low-density mammalian cell suspensions—without requiring vessel-specific clamping mechanisms. While not certified for GLP/GMP-regulated production environments, the instrument meets essential safety and EMC requirements per GB 4793.1–2019 (equivalent to IEC 61010-1) for laboratory electrical equipment. It is suitable for use in academic research, QC testing, environmental monitoring, and pharmaceutical R&D labs operating under ISO/IEC 17025 quality frameworks.
Software & Data Management
The TD-540WHS operates as a standalone hardware platform with no embedded firmware-based data logging or USB/RS-232 connectivity. All operational parameters are set and monitored locally via front-panel controls and LED readouts. For laboratories requiring audit trails or electronic recordkeeping, integration with external data acquisition systems (e.g., LabVIEW-compatible DAQ modules or programmable PLCs) is feasible through analog voltage output signals (0–5 V DC proportional to actual rpm) available via optional accessory port (not standard). No software installation, license, or cloud dependency is required—ensuring compatibility with air-gapped networks and simplifying validation workflows under FDA 21 CFR Part 11 Annex 11 guidelines when used in conjunction with validated third-party logging solutions.
Applications
- Microbial growth studies (E. coli, yeast, Bacillus spp.) in shake-flask bioreactors.
- Antibiotic susceptibility testing and broth dilution assays.
- Protein expression optimization in liquid culture media.
- Solid-phase extraction (SPE) and immunoaffinity capture protocols requiring gentle agitation.
- Environmental water sample homogenization prior to filtration or analysis.
- Cell detachment and resuspension in pre-transfection preparation workflows.
- Chemical synthesis involving heterogeneous catalysis or precipitation reactions.
FAQ
Does the TD-540WHS support temperature control?
No. This model is a non-thermostatic shaker platform. For combined shaking and heating/cooling, consider DRETOP’s TD-540WH series with integrated Peltier or jacketed chamber options.
What is the maximum load capacity at 300 rpm?
The platform maintains rated performance up to 8 kg distributed evenly across the tray. Exceeding this may affect speed accuracy and long-term bearing life.
Is calibration documentation provided with the unit?
Factory calibration certificate (speed verification at 100/200/300 rpm) is included. NIST-traceable recalibration services are available upon request through authorized DRETOP service centers.
Can the shaker operate continuously for 72+ hours?
Yes. The brushless motor and thermal protection system are rated for unattended 24/7 operation under nominal load conditions, subject to ambient temperature ≤35 °C and relative humidity <80% RH.
Are replacement trays or custom fixtures available?
Standard spring-loaded and universal clamp trays are stocked. Custom aluminum or stainless-steel trays with drilled patterns can be ordered under OEM agreement with minimum volume requirements.
