Molecular Devices QPix FLEX Microbial Colony Picking System
| Brand | Molecular Devices |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | Original Equipment Manufacturer (OEM) |
| Country of Origin | China |
| Model | QPix FLEX |
| Instrument Type | Fully Automated Microbial Colony Picking and Screening System |
| Dimensions | 600 × 650 × 620 mm (W × D × H) |
| Weight | 48 kg |
| Operating Environment | Compatible with standard lab benches and anaerobic chambers (O₂ < 1%) |
| Imaging System | High-resolution color CMOS camera with adjustable white balance and dynamic exposure control |
| Pick Accuracy | >99% |
| Throughput | Up to 1,200 colonies per hour (dependent on plate layout and pick strategy) |
| Tip Options | Sterilizable stainless-steel pins and disposable polymer pins (tool-free switching) |
| Liquid Handling | 4-channel positive-displacement pipettor, volume range 1–200 µL, CV < 3% at 20 µL |
| Data Traceability | Integrated 2D barcode scanner for plate-level and pick-event-level audit trail |
| Software Compliance | Supports ALCOA+ principles |
Overview
The Molecular Devices QPix FLEX Microbial Colony Picking System is an integrated, benchtop-scale automation platform engineered for high-fidelity colony isolation and downstream microbiological workflow integration. Based on machine vision-guided robotic colony recognition and precision mechanical picking, the system implements a deterministic, image-based selection protocol rooted in morphological and chromogenic feature extraction. Unlike legacy manual or semi-automated approaches, QPix FLEX performs colony identification, verification, and physical transfer without human intervention—enabling reproducible, operator-independent execution of critical early-stage microbiology steps. Its compact footprint and environmental tolerance (including direct operation inside anaerobic chambers with O₂ ≤ 1%) make it uniquely suited for obligate anaerobe work, synthetic biology strain construction, and quality-controlled microbial limit testing environments where sterility, spatial constraints, and atmospheric control are non-negotiable.
Key Features
- High-fidelity colony classification using calibrated color imaging and adaptive threshold segmentation—capable of distinguishing subtle phenotypic differences in colony size, shape, opacity, margin morphology, and pigment expression (e.g., β-galactosidase activity, fluorescent protein expression, or chromogenic substrate hydrolysis).
- Modular tip architecture supporting rapid, tool-free interchange between reusable sterilizable stainless-steel pins and single-use polymer tips—enabling seamless transition between high-throughput screening and contamination-sensitive applications without hardware reconfiguration.
- Integrated 4-channel positive-displacement liquid handler delivering precise, low-volume dispensing (1–200 µL) for agar plate inoculation, glycerol stock preparation, media overlay, and serial dilution—all within the same instrument footprint.
- Real-time 2D barcode scanning at plate loading, colony picking, and output stage—generating immutable, time-stamped metadata for each plate, well, and picked colony, satisfying traceability requirements under ISO/IEC 17025, USP , and EU GMP Annex 11.
- Embedded environmental monitoring (temperature, relative humidity) with logging capability—supporting qualification documentation for installation and operational qualification (IQ/OQ) in regulated laboratories.
Sample Compatibility & Compliance
QPix FLEX accommodates standard microbiological formats including 96-well, 384-well, and rectangular Petri dishes (up to 150 mm diameter), with support for both solid agar and semi-solid selective/differential media (e.g., MacConkey, XLD, CHROMagar™, R2A). The system has been validated for use with Gram-positive and Gram-negative bacteria, yeasts (e.g., Saccharomyces cerevisiae, Candida albicans), and select anaerobes (Bifidobacterium, Clostridium spp.) under controlled atmosphere conditions. It meets essential performance criteria outlined in ASTM E2924-21 (Standard Guide for Microbial Colony Picking Systems), complies with IEC 61000-6-2/6-4 for electromagnetic compatibility, and supports full data integrity alignment with FDA 21 CFR Part 11 through configurable role-based access control, electronic signature enforcement, and tamper-evident audit logs.
Software & Data Management
The QPix Control Suite provides a browser-based interface built on a secure, containerized Linux backend. Workflow configuration is achieved via drag-and-drop protocol builder, supporting conditional logic (e.g., “pick only colonies >200 µm with blue hue intensity ≥75%”) and multi-step sequencing (e.g., “scan → classify → pick → inoculate into 96-well glycerol plate → re-scan”). All image data, pick coordinates, tip usage history, and environmental logs are stored in ACID-compliant PostgreSQL databases with daily encrypted backups. Raw images are retained in lossless TIFF format with embedded EXIF metadata; processed pick lists export to CSV, Excel, or LIMS-compatible XML. Audit trails record all user actions—including parameter changes, protocol edits, and manual overrides—with hash-verified timestamps and session identifiers.
Applications
QPix FLEX serves as a core automation node across multiple regulated and discovery-driven domains: synthetic biology (library construction, CRISPR clone validation, pathway optimization), pharmaceutical microbiology (microbial enumeration, bioburden assessment, environmental monitoring isolate archiving), food safety (pathogen confirmation, spoilage organism isolation), and academic research (mutant screening, metagenomic clone picking, antibiotic resistance profiling). Its ability to maintain sterility-critical workflows while delivering >95% process efficiency reduction versus manual methods makes it particularly valuable in labs undergoing digital transformation under ISO 13485 or ICH Q5D compliance frameworks.
FAQ
Can QPix FLEX operate inside an anaerobic chamber without modification?
Yes—the system’s mechanical design, power delivery, and thermal management are certified for continuous operation in O₂-controlled environments (≤1% O₂) with standard chamber feedthroughs.
Does the software support integration with laboratory information management systems (LIMS)?
Yes—via RESTful API and HL7-compliant message exchange; pre-built connectors available for Thermo Fisher SampleManager, LabVantage, and STARLIMS.
What level of training is required for routine operation?
Operators require ≤4 hours of hands-on instruction covering plate loading, protocol selection, QC image review, and basic troubleshooting; no programming expertise is needed.
Is validation documentation provided for GxP environments?
Yes—Molecular Devices supplies a comprehensive Validation Support Package including URS, FAT/SAT protocols, IQ/OQ templates, and risk assessments aligned with ISO 14971.
How is calibration maintained over time?
The system performs automated optical calibration at startup; annual performance verification includes camera focus validation, tip alignment verification, and volumetric accuracy checks using gravimetric methods per ISO 8655-6.
