WIGGENS WS-50DR Standard Reciprocal Shaker

Overview

The WIGGENS WS-50DR Standard Reciprocal Shaker is an engineered platform for precise, repeatable linear oscillation in life science laboratories. Designed around a robust electromagnetic drive system, it delivers controlled reciprocal motion—distinct from orbital or rotary shakers—making it especially suited for applications requiring uniform shear stress distribution across viscous or sediment-prone samples. Its core principle relies on a balanced reciprocating mechanism that generates consistent back-and-forth displacement along a single horizontal axis, minimizing sample splashing and ensuring high reproducibility in cell suspension, immunoassay plate washing, blotting protocols, and hybridization steps. The device operates at ambient temperature without integrated heating or cooling, positioning it as a dedicated mechanical agitation tool rather than a climate-controlled incubator shaker.

Key Features

• Reciprocal oscillation mode optimized for low-shear, high-uniformity mixing of sensitive biological samples including ELISA plates, Western blot membranes, and tissue culture flasks.
• Adjustable amplitude options (8 mm, 14 mm, and standard 20 mm) allow fine-tuning of mechanical energy input to match sample viscosity, container geometry, and protocol requirements.
• Wide speed range (10–250 rpm) with ±2 rpm accuracy at 100 rpm ensures reliable calibration traceability for SOP-driven environments.
• High-resolution LED display provides real-time feedback on set parameters and elapsed time, supporting visual verification during operation.
• Programmable multi-step sequencing: supports delayed start, forward/reverse alternation, and pause intervals—configurable from 10 seconds to 59 minutes 59 seconds per phase—enabling complex agitation routines without external controllers.
• Sturdy aluminum-alloy chassis and reinforced platform (320 × 260 mm) accommodate standard microplate carriers, flask clamps, and custom fixtures; load capacity up to 5 kg distributed evenly.

Sample Compatibility & Compliance

The WS-50DR accommodates common labware including 96-well microplates (flat-bottom and U/V-shaped), Petri dishes (up to 150 mm diameter), Erlenmeyer flasks (50–500 mL), and rectangular hybridization trays. Its linear motion profile reduces meniscus disruption and minimizes bubble formation in low-volume aqueous solutions—critical for downstream detection sensitivity in molecular assays. While not certified for ISO 13485 or FDA 21 CFR Part 11 out-of-the-box, the shaker’s deterministic timer logic and non-volatile parameter storage support GLP-compliant documentation when integrated into validated workflows. Users may implement audit trails via external logging systems connected through RS-232 or analog output interfaces (optional accessory).

Software & Data Management

The WS-50DR operates via embedded firmware with no proprietary software dependency. All settings—including speed, amplitude, timer duration, and directional sequence—are stored locally and retained after power cycling. For labs requiring electronic recordkeeping, optional communication modules enable integration with LabVantage, STARLIMS, or custom Python-based acquisition scripts using ASCII command protocols. Time-stamped operational logs can be generated externally via TTL pulse outputs synchronized to motion cycles, facilitating correlation with analytical instrument triggers in automated assay platforms.

Applications

• Immunodetection workflows: uniform washing of nitrocellulose or PVDF membranes during chemiluminescent or fluorescent blot development.
• Molecular hybridization: controlled agitation of DNA/RNA probes in sealed hybridization ovens or water baths to enhance binding kinetics without denaturation.
• Cell-based assays: gentle resuspension of adherent or suspension cultures prior to centrifugation or viability staining.
• Reagent preparation: homogenization of antibody conjugates, blocking buffers, and secondary detection reagents where vortexing introduces air entrapment.
• Quality control testing: standardized agitation for extractables/leachables studies in pharmaceutical packaging validation per USP and ISO 10993-12 guidelines.

FAQ

Is the WS-50DR compatible with PCR plates and deep-well plates?
Yes—the 320 × 260 mm platform supports standard SBS-format microplates (including 384-well and deep-well variants) when used with appropriate plate carriers or silicone matting to prevent lateral slippage.
Does this shaker meet CE or RoHS requirements?
Yes—the unit complies with EU Directive 2014/30/EU (EMC) and 2011/65/EU (RoHS II); full declaration of conformity is supplied with each shipment.
Can amplitude be adjusted during operation?
No—amplitude selection requires manual mechanical adjustment prior to startup; it is not dynamically variable under power.
What maintenance is required for long-term reliability?
Annual inspection of drive belt tension and platform mounting screws is recommended; no lubrication is required due to sealed electromagnetic actuator design.
Is there a safety interlock for lid closure?
No—the WS-50DR is designed for open-platform use; users must ensure proper containment of volatile or biohazardous samples using secondary enclosures per institutional biosafety policies.