DRETOP TD-40WS Digital Variable-Speed Multi-Function Shaker

Overview

The DRETOP TD-40WS Digital Variable-Speed Multi-Function Shaker is an engineered solution for precise, reproducible agitation of biological and biochemical samples in research and quality control laboratories. Designed around a robust single-axis balanced drive mechanism, it operates on reciprocating oscillation—delivering consistent linear motion ideal for suspension culture, solubilization, mixing, and cell propagation applications. Unlike orbital shakers optimized for flask-based aerobic cultures, the TD-40WS prioritizes mechanical stability and low-noise operation across its full speed range (0–300 rpm), making it suitable for sensitive protocols where vibration transmission or thermal drift must be minimized. Its non-temperature-controlled architecture ensures reliability in ambient-lab environments and eliminates condensation-related risks associated with refrigerated or heated units—aligning with standard biosafety level 1 (BSL-1) and GLP-compliant workflows.

Key Features

• Digitally controlled variable-speed operation via precision potentiometer, enabling smooth, stepless adjustment from standstill to 300 rpm with ±1 rpm repeatability;
• Integrated microprocessor-based controller with real-time LED digital display for simultaneous monitoring of elapsed time and set speed;
• Power-loss recovery function: automatically resumes pre-interruption operating parameters—including speed, timer value, and run state—upon AC power restoration;
• Intelligent audio-visual alarm system continuously scans operational conditions; triggers alerts and initiates safety cutoff during motor overheating, abnormal current draw, or mechanical stall;
• Brushless AC induction motor design ensures maintenance-free longevity, constant torque delivery across the entire speed spectrum, and reduced electromagnetic interference;
• Dedicated soft-start circuitry limits inrush current and prevents abrupt acceleration—critical for preserving fragile cell pellets, agarose gels, or sedimented precipitates;
• Memory retention for last-used settings eliminates redundant configuration between sequential experiments, supporting ISO/IEC 17025 documentation traceability requirements.

Sample Compatibility & Compliance

The TD-40WS accommodates standard laboratory vessels including Erlenmeyer flasks (up to 250 mL × 6), test tubes, petri dishes, and multi-well plates when mounted on its 440 × 270 mm spring-loaded platform. Its 20 mm stroke amplitude provides sufficient kinetic energy for homogeneous suspension without inducing excessive shear stress on mammalian or microbial cells. The device complies with IEC 61000-6-3 (EMC emission standards) and IEC 61000-6-2 (immunity requirements), and meets CE marking directives for electrical safety (EN 61010-1). While not certified for use in classified cleanrooms (ISO 14644-1 Class 5 or higher), its low particulate generation and absence of internal cooling fans make it suitable for ISO 8 (Class 100,000) environments. No temperature regulation is provided; users requiring thermal control must integrate external incubators or environmental chambers per ASTM E1918 guidelines.

Software & Data Management

The TD-40WS operates as a standalone instrument with no embedded firmware update capability or USB/RS-232 connectivity. All operational parameters are set and monitored locally via front-panel controls and LED readouts. For laboratories implementing 21 CFR Part 11 compliance, manual logbook entries—including date/time stamp, operator ID, speed setting, duration, and vessel configuration—are required to satisfy audit trail expectations. The device supports GLP-aligned workflow integrity through deterministic behavior: identical input settings yield identical mechanical output across repeated cycles, enabling method validation per USP Analytical Instrument Qualification protocols. No proprietary software drivers or cloud interfaces are involved—ensuring long-term operational continuity independent of vendor support lifecycles.

Applications

• Microbial growth studies: uniform aeration of liquid cultures in shake flasks for bacterial, yeast, or fungal propagation;
• Protein solubilization and antigen extraction: mechanical dispersion of inclusion bodies or tissue homogenates;
• Immunoassay preparation: consistent mixing of ELISA plate wells prior to washing steps;
• Environmental sample processing: homogenization of soil suspensions or water microbiological concentrates;
• Pharmaceutical QC: dissolution testing support, excipient blending verification, and buffer equilibration;
• Educational labs: hands-on instruction in kinetics, mass transfer, and bioreactor fundamentals at undergraduate and graduate levels.

FAQ

Is the TD-40WS compatible with incubator integration?

Yes—its ambient-only operation and compact footprint (440 × 270 × 250 mm) allow safe placement inside standard CO₂ or humidity-controlled incubators, provided adequate ventilation and clearance from heat sources are maintained.
Does the shaker support continuous operation beyond 999 minutes?

No—the maximum timer setting is 999 minutes (16.65 hours); for extended runs, manual restart or external timer relay integration is required.
Can the platform accommodate custom fixtures or clamps?

The spring-loaded tray features standardized mounting holes compatible with third-party universal clamps and universal flask holders meeting DIN 12878 specifications.
What maintenance is required for long-term reliability?

None beyond periodic cleaning of the tray surface and inspection of spring tension; the brushless motor and sealed bearings eliminate lubrication or carbon-brush replacement needs.
Is calibration documentation available for ISO/IEC 17025 accreditation?

Factory calibration certificates are not supplied by default, but users may perform in-house speed verification using a certified tachometer per ISO 16269-6 statistical sampling protocols.