Smart Agar Medium Dispensing System by X-Imaging

Overview

The Smart Agar Medium Dispensing System by X-Imaging is an integrated, benchtop laboratory automation platform engineered for the precise, aseptic, and traceable dispensing of molten agar-based culture media into standard and custom-format Petri dishes. Leveraging gravity-fed peristaltic pumping combined with programmable motion control and closed-chamber UV-C sterilization, the system operates on core principles of volumetric consistency, thermal stability, and environmental isolation—critical for microbiological assay integrity. Designed to function within Class II biological safety cabinets or laminar flow hoods, it eliminates manual pouring, operator-dependent variability, and airborne contamination risks inherent in traditional media preparation workflows. Its architecture supports GLP-aligned documentation practices through embedded time-stamped logging and direct-label printing, making it suitable for regulated environments including clinical microbiology labs, pharmaceutical QC units, and academic core facilities requiring reproducible agar plate production.

Key Features

• High-throughput dispensing at up to 300 standardized 90 mm Petri dishes per hour, with cycle time optimization enabled via adaptive valve timing and nozzle calibration
• Dedicated temperature-controlled agar reservoir and dispensing pathway, maintaining media viscosity within optimal range (40–60 °C) with ±1 °C thermal stability over extended operation
• Modular design supporting field-installable options: optional shaking module for homogeneous suspension of selective agents (e.g., antibiotics, dyes), optional double-layer pour module for overlay techniques, and optional heated stacking station to prevent condensation during plate stacking
• UV-C (254 nm) irradiation zone confined to the dispensing chamber only—activated automatically before and after each batch—with interlocked door sensor ensuring zero exposure during operation
• Integrated thermal inkjet printer delivering ISO/IEC 15415-compliant 2D DataMatrix codes directly onto dish lids or base rims, capturing medium type, lot number, preparation timestamp, operator ID, and incubation parameters
• Compact footprint (W × D × H: 520 × 480 × 410 mm) enabling seamless integration into ISO 5 cleanroom workspaces and standard biosafety cabinets (min. internal depth ≥ 550 mm)

Sample Compatibility & Compliance

The system accommodates standard polystyrene and polypropylene Petri dishes (90 mm diameter), with mechanical adaptability for 35 mm, 60 mm, and 150 mm formats via optional tooling kits. All wetted components—including silicone tubing, stainless-steel nozzles, and PTFE-coated reservoir surfaces—are autoclavable or compatible with validated liquid disinfectants (e.g., 70% ethanol, 0.5% sodium hypochlorite). The device conforms to IEC 61000-6-2 (immunity) and IEC 61000-6-3 (emissions) for electromagnetic compatibility, and meets UL 61010-1 safety requirements for laboratory equipment. While not FDA-cleared as a medical device, its data logging and audit trail functionality align with FDA 21 CFR Part 11 expectations for electronic records when deployed in GMP-compliant environments under appropriate procedural controls.

Software & Data Management

Controlled via a 7-inch capacitive touchscreen interface running a deterministic real-time OS, the system provides intuitive recipe-driven operation with password-protected user roles (Operator, Technician, Administrator). Each dispensing run generates a structured .CSV log file containing timestamps, volume setpoints, actual dispensed volumes (derived from calibrated pump rotations), temperature profiles, UV activation cycles, and printed code identifiers. Logs are exportable via USB or network share (SMB protocol) and support integration into LIMS platforms via configurable RESTful API endpoints. Audit trails retain immutable records of all parameter changes, user logins, and system events for minimum 12 months—satisfying GLP documentation retention mandates.

Applications

• Routine preparation of nutrient, blood, MacConkey, and chromogenic agar plates for clinical specimen processing
• High-volume plate manufacturing in contract testing laboratories serving food safety (ISO 6579, ISO 11290) and environmental monitoring programs
• Standardized agar plate generation for antimicrobial susceptibility testing (AST) following CLSI M02-A13 and EUCAST guidelines
• Research-grade plate production requiring low inter-plate coefficient of variation (<2.5%) in agar thickness and volume uniformity
• Support for regulatory submissions where documented media preparation consistency is required (e.g., USP <61>, EP 2.6.12)

FAQ

Can the system handle viscous or particulate-containing media (e.g., blood agar, chocolate agar)?

Yes—the peristaltic pump architecture and wide-bore dispensing nozzles (internal diameter ≥ 2.4 mm) accommodate media with suspended erythrocytes or precipitated hemoglobin without clogging, provided pre-warming and gentle agitation are maintained upstream.
Is remote monitoring or integration with existing lab infrastructure possible?

The system supports Ethernet connectivity and exposes a documented HTTP-based API for status polling, job initiation, and log retrieval—enabling integration with MES, LIMS, or building management systems.
What validation documentation is provided for IQ/OQ protocols?

X-Imaging supplies a comprehensive User Requirement Specification (URS)-aligned qualification package, including factory test reports, calibration certificates for temperature and volumetric subsystems, and blank IQ/OQ templates compliant with ISO/IEC 17025 and ASTM E2500.