A&D MPA-20 Electronic Single-Channel Pipette

Overview

The A&D MPA-20 Electronic Single-Channel Pipette is an ergonomically engineered liquid handling instrument designed for high-precision volumetric delivery in regulated laboratory environments. Operating on the principle of positive displacement with motor-driven piston actuation, the MPA-20 ensures consistent aspiration and dispensing across its full 2–20 µL range. Its closed-loop electronic control system dynamically compensates for environmental variables—including ambient temperature fluctuations and tip compressibility—thereby maintaining metrological integrity under routine benchtop conditions. Unlike air-displacement pipettes with fixed mechanical linkages, the MPA-20 integrates real-time force feedback during tip attachment and plunger actuation, minimizing operator-induced variability and supporting reproducible technique across user cohorts. The device is intended for use in quality control laboratories, clinical diagnostics, molecular biology workflows, and pre-analytical sample preparation where trace-level accuracy and audit-ready calibration records are essential.

Key Features

• Four programmable dispensing modes: Standard Pipetting, Multiple Dispensing, Mixing Dispensing, and Reverse Pipetting—each configurable via intuitive single-button navigation.
• Ergonomic lightweight housing (≤110 g) with low actuation force (≤1.2 N for aspiration, ≤0.8 N for dispensing), significantly reducing cumulative hand fatigue during high-throughput operations.
• Patented snap-fit tip interface eliminates manual twisting or excessive downward pressure; achieves gas-tight seal within ±0.5 mm axial tolerance, verified per ISO 8655-5:2022 tip retention testing.
• Impact-resistant polymer LCD display with anti-glare coating and tactile feedback—designed to withstand incidental drops from standard bench height (≤75 cm) without functional degradation.
• Integrated rechargeable lithium-ion battery (1200 mAh) providing ≥1,200 pipetting cycles per full charge; USB-C port enables rapid top-up (<30 min for 80% capacity) without requiring proprietary chargers.
• On-device volumetric calibration capability compliant with ISO 8655-6:2022 Annex B—users may perform both gravimetric verification (using certified weights and Class A distilled water) and in-situ volumetric adjustment using reference standards traceable to NIST SRM 2799.

Sample Compatibility & Compliance

The MPA-20 accommodates standard conical polypropylene tips (10–200 µL nominal volume range) and demonstrates stable performance with aqueous buffers, glycerol solutions (up to 40% v/v), and low-viscosity organic solvents (e.g., ethanol, acetone). It is not recommended for highly volatile, corrosive, or particulate-laden liquids without prior validation. The instrument’s firmware and mechanical architecture conform to IEC 61326-1:2013 (EMC requirements for laboratory equipment) and IEC 61010-1:2010 (safety specifications for electrical equipment). While the pipette itself does not carry CE marking as a standalone medical device, its design supports alignment with ISO 15195:2018 (reference measurement systems) and facilitates documentation required for FDA 21 CFR Part 11-compliant electronic records when paired with validated LIMS integration protocols.

Software & Data Management

The MPA-20 operates autonomously without external software dependency; however, optional A&D PipetteLink™ desktop application (Windows/macOS) enables export of calibration logs, usage history (timestamped cycle count), and mode-specific parameter archives in CSV and PDF formats. All calibration events—including date, operator ID, reference standard lot number, and deviation values—are stored locally with tamper-evident digital signatures. Audit trails comply with ALCOA+ principles (Attributable, Legible, Contemporaneous, Original, Accurate, Complete, Consistent, Enduring, Available) and support retrospective review during internal audits or regulatory inspections (e.g., ISO/IEC 17025, CLIA, or EU GMP Annex 11).

Applications

• Quantitative PCR (qPCR) master mix preparation requiring sub-microliter precision at the 2–5 µL scale.
• High-content screening (HCS) assay plate setup with multi-step reagent addition and mixing routines.
• Clinical chemistry dilution series generation under CAP-accredited laboratory protocols.
• Reference material preparation for interlaboratory comparison studies adhering to ISO Guide 35:2017.
• Cell culture media supplementation where viscosity-induced error must be mitigated via reverse pipetting mode.

FAQ

Does the MPA-20 require annual factory recalibration?
No—user-performed volumetric calibration is fully supported and satisfies ISO 8655-6:2022 requirements for in-house verification. Factory recalibration is recommended only after physical damage or if calibration drift exceeds ±1.5% at 20 µL over three consecutive verifications.
Can the MPA-20 be used with filtered tips?
Yes—filtered tips compatible with standard 10–200 µL conical geometry function reliably; however, filtration membranes may increase backpressure, necessitating minor adjustment of aspiration speed settings in viscous applications.
Is the battery replaceable by the end user?
No—the sealed lithium-ion cell is not field-replaceable; battery service must be performed by authorized A&D technical centers to maintain IP54 ingress protection rating and calibration traceability.
What documentation is provided for compliance purposes?
Each unit ships with a Certificate of Conformance (CoC), ISO 8655-compliant performance test report (pre-shipment), and editable calibration log templates aligned with ISO/IEC 17025 Clause 7.7 requirements.