Rainin EDP3 Electric Single-Channel Pipette

Overview

The Rainin EDP3 Electric Single-Channel Pipette is an ISO 8655-compliant precision liquid handling instrument engineered for reproducible, operator-independent volumetric delivery across life science, clinical diagnostics, and pharmaceutical quality control laboratories. Unlike manual pipettes—whose accuracy is inherently subject to inter-operator variability—the EDP3 employs a microprocessor-controlled stepper motor drive system that decouples volume displacement from user-applied force. This architecture eliminates thumb fatigue, minimizes mechanical hysteresis, and ensures consistent plunger actuation kinetics across thousands of cycles. The device operates on a closed-loop feedback principle: real-time motor position sensing enables dynamic compensation for tip resistance, liquid density, and ambient temperature fluctuations—critical for viscous, volatile, or low-surface-tension samples. Designed and manufactured in the United States under stringent quality management systems aligned with ISO 13485, the EDP3 delivers traceable performance validated per ISO 8655-2 (gravimetric testing) and ISO 8655-5 (calibration procedures).

Key Features

• Motorized Precision Actuation: High-resolution stepper motor with integrated encoder ensures repeatable aspiration/dispense timing and stroke consistency—eliminating human-induced variability in speed, acceleration, and endpoint positioning.
• LTS Tip System Integration: Fully compatible with Rainin’s Low Retention Technology (LTS) tips, reducing residual volume by up to 95% compared to universal-fit tips and minimizing carryover in high-sensitivity assays (e.g., qPCR, ELISA).
• Ergonomic Design Architecture: Balanced weight distribution (≤125 g), angled tip ejection lever, and soft-grip polymer housing reduce wrist flexion and ulnar deviation during extended use—validated in independent biomechanical studies per ISO 11228-3.
• Multi-Program Operation Modes: Supports standard pipetting, reverse pipetting, sequential dispensing, mixing, and titration protocols—all programmable via intuitive rotary dial interface without requiring external software.
• Long-Duration Power Management: Integrated lithium-ion battery supports ≥12 hours of continuous operation (based on 100 µL transfers at 1 Hz); charging via E3-RCS rapid-charging station achieves 80% capacity in <15 minutes.
• Calibration Traceability: On-device linear calibration function adjusts volume output across the full range using certified reference weights; calibration logs include date, operator ID, and deviation values—supporting 21 CFR Part 11 compliance when paired with Liquidator™ Software.

Sample Compatibility & Compliance

The EDP3 is validated for aqueous solutions, buffers, cell culture media, serum, ethanol/water mixtures, and glycerol-containing reagents up to 50% (v/v). Its motor torque profile and optimized air displacement algorithm accommodate surface tensions ranging from 22 mN/m (e.g., 70% ethanol) to 72 mN/m (pure water), ensuring accurate delivery without pre-wetting or over-aspiration corrections. All models comply with ISO 8655-1:2022 (general requirements), ISO 8655-2:2022 (performance testing), and EN ISO 15195:2018 (reference measurement procedures). Device firmware supports GLP/GMP workflows through configurable user access levels, electronic signature capture, and tamper-evident audit trails—fully interoperable with LIMS and electronic lab notebook (ELN) platforms.

Software & Data Management

While standalone operation requires no PC connection, the EDP3 integrates seamlessly with Rainin’s Liquidator™ Software Suite (v3.2+), enabling centralized fleet management, protocol library deployment, and automated calibration reporting. The software generates PDF-formatted calibration certificates compliant with ISO/IEC 17025 requirements and exports CSV datasets for statistical process control (SPC) analysis—including Cg/Cgk, Cp/Cpk, and ANOVA-based channel uniformity assessment. All data exchanges are encrypted using TLS 1.2; audit logs record timestamped events including parameter changes, calibration actions, and user logins—meeting FDA 21 CFR Part 11 Subpart B (electronic records) and Subpart C (electronic signatures) criteria.

Applications

• High-throughput screening (HTS) assay setup requiring sub-microliter precision (e.g., CRISPR guide RNA dilution series)
• Quantitative PCR (qPCR) master mix preparation with ≤2% CV at 1 µL volumes
• Clinical chemistry QC sample dilution across ISO 15197:2013 glucose testing ranges
• Cell line transfection workflows demanding precise DNA:lipid ratios
• GMP-compliant raw material sampling and intermediate testing in API manufacturing
• Reference standard preparation for HPLC method validation per ICH Q2(R2)

FAQ

Is the EDP3 compatible with non-Rainin tips?
The EDP3 is mechanically and functionally optimized for Rainin LTS tips. While universal-fit tips may physically attach, they compromise accuracy, increase carryover risk, and void ISO 8655 compliance—particularly below 10 µL.

How often must the EDP3 be calibrated?
Per ISO 8655-5, calibration frequency depends on usage intensity and criticality of application. Rainin recommends initial verification upon installation, quarterly verification for routine QC use, and post-maintenance recalibration. Automated calibration reminders can be scheduled via Liquidator™ Software.

Does the EDP3 support multi-user environments with role-based access?
Yes—when managed through Liquidator™ Software, administrators can assign roles (e.g., Operator, Calibrator, Auditor) with granular permissions for protocol editing, calibration execution, and audit log review—enabling shared instrument governance in regulated labs.