Thermo Scientific Wellwash Microplate Washer
| Brand | Thermo Fisher Scientific |
|---|---|
| Origin | USA |
| Model | Wellwash |
| Instrument Type | Multifunctional Microplate Washer |
| Wash Head Configuration | 8-channel or 12-channel |
| Rinse Head Design | Single |
| Wash Solution Channels | 1 |
| Soak Time Range | 0–10 min |
| Wash Cycles | 1 |
| Residual Volume per Well | <1.5 µL |
| Plate Shaking Function | Yes |
Overview
The Thermo Scientific Wellwash Microplate Washer is an engineered solution for high-integrity washing of 96-well microplates in ELISA, cell-based assays, and other immunoassay workflows. It operates on a precision fluidics principle—using positive-displacement peristaltic pumping and gravity-assisted aspiration—to deliver consistent, low-variability wash cycles across all wells. Designed for laboratories requiring reproducible plate preparation without cross-contamination risk, the Wellwash meets foundational operational requirements for GLP-compliant environments and supports routine QC/QA processes in biopharmaceutical development, clinical research, and academic life science labs. Its non-pressurized bottle system eliminates backflow hazards and prevents pump contamination, while integrated safety sensors (plate presence detection, liquid level monitoring in wash/waste bottles) ensure fail-safe operation during unattended runs.
Key Features
- High-contrast 480 × 272 color touchscreen display with intuitive, icon-driven interface—supports nine languages including English, German, French, Spanish, Italian, Portuguese, Russian, Japanese, and Chinese for global lab deployment.
- Modular wash head design: Interchangeable 8-channel and 12-channel heads enable rapid adaptation to diverse plate formats and assay protocols; tool-free installation ensures minimal downtime.
- Linear orbital shaking function enhances removal of loosely bound reagents and particulates, improving signal-to-noise ratios in downstream detection steps.
- Non-pressurized fluid handling architecture: Wash and waste bottles operate at ambient pressure—eliminating risk of siphoning, overflow, or pump damage due to backflow.
- Automated maintenance routines: Built-in pre-rinse and post-run flush cycles prevent clogging of tubing and manifolds; removable pre-wash reservoir simplifies cleaning and decontamination.
- Color-coded tubing connectors and sensor cables accelerate initial setup and reduce installation errors—critical for multi-user core facilities.
Sample Compatibility & Compliance
The Wellwash is validated for use with standard flat-bottom, U-bottom, and V-bottom 96-well polystyrene and polypropylene microplates. It accommodates wash volumes from 50 µL to 1000 µL per well, with programmable soak times (0–10 minutes) and single-cycle washing optimized for antibody-binding kinetics in ELISA and similar solid-phase assays. All fluid paths are chemically resistant to common buffers (PBS, Tris-HCl, Tween-20 solutions) and mild disinfectants. While not certified for ISO 13485 or FDA 21 CFR Part 11 out-of-the-box, its audit-ready operation log (exportable via USB) and deterministic wash parameters support traceability in GMP-aligned workflows when paired with laboratory SOPs. The aerosol cover (optional N10815) provides physical containment for biosafety level 2 (BSL-2) applications involving infectious agents.
Software & Data Management
Internal firmware enables storage and execution of up to 20 user-defined wash protocols, each configurable for dispense volume (50–400 µL), aspiration volume, soak duration, number of cycles (fixed at 1), and shake speed/duration. Protocols can be transferred between instruments—or archived on external PCs—via USB flash drive. System logs (including date/time stamps, protocol name, operator ID if entered manually, and error codes) are exportable in CSV format for quality record retention. Firmware updates are performed offline using signed USB packages, ensuring version control integrity. No network connectivity or cloud dependency is required—maintaining data sovereignty in regulated environments.
Applications
- ELISA and multiplex immunoassays requiring stringent background reduction and minimal residual volume (<1.5 µL/well).
- Cell-based assays where gentle yet effective removal of non-adherent cells or media components is critical prior to fixation or staining.
- Preparation of plates for subsequent reading on compatible microplate readers (e.g., Thermo Scientific Varioskan LUX or Multiskan GO).
- Routine QC testing in diagnostic kit manufacturing, where wash consistency directly impacts inter-assay precision.
- Academic screening workflows involving high-throughput ligand binding or receptor occupancy studies.
FAQ
What microplate formats does the Wellwash support?
The instrument is optimized for standard 96-well plates only; it does not accommodate 384-well or custom geometries.
Can the Wellwash perform multiple wash cycles per run?
No—it executes one defined wash cycle per program execution; repeat cycles require manual re-initiation or external scheduling.
Is the Wellwash compatible with automated liquid handlers or robotic arms?
It lacks native RS-232, Ethernet, or API interfaces; integration into automated workcells requires third-party middleware or custom hardware triggering.
How is calibration verified?
Thermo Fisher provides a recommended verification procedure using gravimetric measurement of dispense/aspirate volumes; no built-in auto-calibration function is present.
What maintenance is required on a weekly basis?
Users should inspect tubing for cracks or kinks, clean the wash head gasket and aspiration manifold with 70% ethanol, and run the internal flush routine after each day’s use.
