Rainin E4 XLS+ Adjustable Spacing Electronic Multichannel Pipette
| Brand | Rainin |
|---|---|
| Origin | Switzerland |
| Model | E4 XLS+ Adjustable Spacing |
| Type | Electronic Multichannel Pipette |
| Channels | 6 |
| Volume Range | 20–300 µL |
| Accuracy | ±2.5% at 0.75 µL, ±0.8% at 1.2 µL and 2.4 µL |
| Precision (CV) | ≤1.0% at 0.3 µL, ≤0.25% at 0.375 µL, ≤0.15% at 0.45 µL |
| Minimum Increment | 0.2 µL |
| Adjustable Tip Spacing | 9–19 mm (6-channel) |
| Compliance | GLP/GMP-ready with audit-trail-capable service logging and password-protected protocol settings |
Overview
The Rainin E4 XLS+ Adjustable Spacing Electronic Multichannel Pipette is an engineered solution for high-throughput liquid handling in regulated and research-intensive laboratory environments. Built upon Rainin’s legacy of precision fluidics and LTS (Low Retention Technology) tip interface design, the E4 XLS+ employs microprocessor-controlled stepper motor actuation—delivering consistent piston displacement across all six channels with 4,000 discrete steps per full stroke. Its core operational principle relies on positive displacement via calibrated air displacement pistons, ensuring traceable volumetric accuracy under ISO 8655-compliant conditions. Unlike fixed-spacing multichannel pipettes, the E4 XLS+ integrates a continuous, single-hand-adjustable tip spacing mechanism, enabling seamless transitions between standard 96-well plates (9 mm pitch) and wider-format vessels such as 24-well plates or 15 mL conical tubes (up to 19 mm pitch). This mechanical flexibility eliminates manual re-pipetting or adapter-based workarounds—reducing both procedural variability and operator fatigue during repetitive plate-to-plate transfers.
Key Features
- Continuous adjustable tip spacing (9–19 mm) optimized for 6-channel configuration, supporting direct transfer from 96-well source plates to 24-well assay plates or tube racks without intermediate dilution or reformatting.
- LTS (Low Retention Technology) tip interface ensures first-time, repeatable sealing across all channels—eliminating manual twisting or forceful seating; tip ejection force reduced to just 0.6 kg thanks to integrated silicone dampers.
- Onboard microprocessor governs all piston motion: speed, distance, acceleration, and zero-point recalibration after each dispense cycle—ensuring metrological consistency across thousands of operations.
- Ergonomic, ambidextrous design with contoured finger hooks, low-effort lever actuation, and glove-compatible tactile feedback—validated for sustained use in biosafety cabinets and cleanroom workflows.
- Large color LCD display with rotary navigation dial and intuitive joystick control enables rapid access to stored protocols, real-time volume adjustment, and mode switching—even while wearing nitrile or latex gloves.
- Long-life rechargeable battery supports ≥1,000 pipetting cycles per charge (typical usage), with >3,000 full-charge cycles over device lifetime—minimizing downtime and enabling full-shift operation without interruption.
Sample Compatibility & Compliance
The E4 XLS+ is compatible with all Rainin LTS-certified tips—including low-retention, filtered, and ultra-low-binding variants—as well as third-party LTS-compatible tips meeting ISO 8655-5 dimensional tolerances. Its calibration and performance verification align with ISO 8655-2 (volumetric accuracy), ISO 8655-3 (precision), and ASTM E2758 (electronic pipette validation guidelines). For laboratories operating under GLP or GMP frameworks, the instrument supports full auditability: service logs, calibration history, usage counters (total cycles, tip ejections), and firmware version tracking are stored in write-protected memory. Password-protected access controls restrict modification of critical parameters (e.g., volume limits, protocol edits, service alerts), satisfying FDA 21 CFR Part 11 requirements for electronic records and signatures when paired with Rainin’s Liquidator® software.
Software & Data Management
While fully functional in standalone mode, the E4 XLS+ integrates seamlessly with Rainin’s Liquidator® desktop application via USB-C or Bluetooth Low Energy (BLE). This software enables centralized fleet management—including remote firmware updates, batch calibration report generation, and export of GLP-compliant CSV logs containing timestamps, user IDs, volume settings, and error codes. All onboard protocols—including AutoPace dispensing, serial dilution routines, and multi-step aliquoting sequences—are encrypted and timestamped upon save. User-defined profiles can be backed up, duplicated, or deployed across multiple E4 units—ensuring SOP uniformity across lab teams. No cloud dependency is required; data remains resident on-device unless explicitly exported.
Applications
The E4 XLS+ serves as a primary liquid handling platform in applications demanding both volumetric fidelity and spatial adaptability: high-content screening (HCS) where compounds are transferred from master plates to assay plates with variable well geometries; cell-based assays requiring parallel seeding into multi-well formats with non-uniform spacing; nucleic acid library preparation involving enzymatic reactions across 96- and 384-well plates; and bioprocess QC workflows involving sampling from shake flasks or bioreactor ports spaced at irregular intervals. Its ability to execute complex, multi-segment protocols—including gradient dispensing, reverse pipetting for viscous samples, and stepwise dilution series—makes it particularly suited for genomics, proteomics, and stem cell culture laboratories operating under ISO/IEC 17025 or CLIA accreditation.
FAQ
Does the E4 XLS+ require annual calibration by an accredited service provider?
Yes—while the device performs automatic zero-point recalibration before each dispense, periodic verification against gravimetric standards (per ISO 8655-6) is required for GLP/GMP compliance. Rainin-certified technicians provide traceable calibration certificates with NIST-traceable weights.
Can I use non-LTS tips with the E4 XLS+?
Mechanically possible, but not recommended: non-LTS tips risk inconsistent sealing, increased carryover, and compromised accuracy—especially at low volumes (<50 µL). Rainin validates performance only with LTS-certified consumables.
How is user access controlled for protocol editing?
Three-tier password protection is available: Operator (run-only), Supervisor (edit protocols), and Administrator (full system configuration, including service mode and firmware updates). Passwords comply with NIST SP 800-63B complexity requirements.
Is PureSpeed™ functionality enabled by default?
Yes—all E4 XLS+ units ship with PureSpeed™ pre-installed and activated. This feature optimizes aspiration/dispense kinetics for high-molecular-weight biomolecules (e.g., plasmid DNA, IgG, oligonucleotides) using proprietary flow-profile algorithms that minimize shear stress and maximize recovery yield.
What is the warranty coverage for the E4 XLS+?
Rainin provides a 2-year limited warranty covering parts and labor for defects in materials and workmanship under normal laboratory use, extendable to 3 years with registration and annual service contract enrollment.
