Hopebio GH-PML01 Smart Petri Dish Dispenser

Overview

The Hopebio GH-PML01 Smart Petri Dish Dispenser is an automated, gravity-driven media dispensing system engineered for aseptic preparation of microbiological culture plates in regulated laboratory environments. Unlike peristaltic or piston-based dispensers, the GH-PML01 employs a human-hand-mimicking tilting mechanism—actuated by high-resolution servo motors and guided by real-time load-cell feedback—to deliver precise, contamination-controlled pour volumes directly from standard laboratory vessels. This eliminates fluid-path components such as silicone tubing, reducing carryover risk, sterilization overhead, and maintenance downtime. The unit integrates a Class II biological safety cabinet–level containment architecture: a top-mounted HEPA filter generates unidirectional laminar airflow (≥0.45 m/s at working surface), while a 254 nm UV-C lamp provides surface decontamination during idle periods. Designed for ISO 13485-aligned workflows and compatible with GLP/GMP documentation requirements, the GH-PML01 supports traceable, repeatable plate preparation across food safety (ISO 7218, AOAC), environmental (EPA 1603, ISO 9308-1), and water quality (APHA 9221) testing protocols.

Key Features

• Gravity-based dispensing with real-time mass feedback control ensures ±2 mL volumetric accuracy without fluid-path contact—no tubing, no valves, no calibration drift.
• Integrated mechanical arm with programmable electric gripper performs full-cycle automation: dish loading, lid removal, medium dispensing, post-pour orbital mixing (via rotating dish platform), lid replacement, and stack formation—up to 40 dishes per cycle.
• Heated vessel holder maintains molten agar or selective media at user-defined temperatures (45–55 °C range) during extended runs, preventing premature solidification and ensuring consistent viscosity delivery.
• Modular fixture design accommodates standard 500 mL and 1000 mL Erlenmeyer flasks and wide-mouth reagent bottles; custom fixtures available for alternative container geometries (e.g., 2 L carboys, glass jars).
• Onboard vibration agitation prevents particulate settling in suspension-based media (e.g., VRBA, mFC, SCDA), preserving homogeneity prior to dispensing.
• Embedded Wi-Fi module enables secure over-the-air firmware updates, remote diagnostics, and audit-log export—fully compliant with FDA 21 CFR Part 11 data integrity requirements when paired with validated LIMS integration.

Sample Compatibility & Compliance

The GH-PML01 accepts standard 90 mm Petri dishes (sterile or non-sterile); custom adapters support 35 mm, 60 mm, and 150 mm formats. Media compatibility includes all common agar-based formulations (TSA, PCA, VRBA, MacConkey, Sabouraud, etc.), broth overlays, and semi-solid gels—provided viscosity remains within 50–500 cP at dispensing temperature. The system meets ISO 14644-1 Class 5 cleanroom air performance standards under operational conditions and conforms to IEC 61000-6-3 (EMC) and IEC 61010-1 (safety). UV-C irradiance output is certified per IEC 62471 for Germicidal Safety Class 1 (low-risk exposure).

Software & Data Management

The 7-inch industrial touchscreen runs embedded Linux with a purpose-built HMI optimized for glove-compatible operation. Each dispensing run logs timestamp, vessel ID (optional barcode scan), dish count, target volume, actual dispensed mass, ambient temperature/humidity, and UV lamp runtime. Audit trails are stored locally (16 GB internal eMMC) with optional encrypted export via USB or SFTP. Software supports CSV and PDF report generation with digital signature fields, aligning with ISO/IEC 17025 documentation mandates. Remote access requires TLS 1.2+ authentication and role-based permissions (Operator, Supervisor, Administrator).

Applications

The GH-PML01 serves core functions in accredited microbiology laboratories: routine plate pouring for total viable count (TVC), coliform enumeration, pathogen isolation (e.g., Salmonella, E. coli O157), and antimicrobial susceptibility testing (AST) plate preparation. It is widely deployed in food production QC labs (BRCGS, SQF-certified facilities), municipal water treatment plants, contract testing organizations (CTOs), and university research cores where reproducibility, throughput scalability, and operator safety are critical. Its tube-free architecture makes it especially suitable for high-containment (BSL-2) applications involving hazardous or antibiotic-supplemented media.

FAQ

Does the GH-PML01 require sterilization of internal fluid paths between runs?
No—because it uses a contactless gravity pour method with no wetted surfaces, only external vessel and dish sterilization is required.
Can the system be integrated into a laboratory information management system (LIMS)?
Yes—via RESTful API or HL7-compliant interface; validation documentation (IQ/OQ/PQ templates) is provided upon request.
What maintenance is required beyond routine cleaning?
Annual recalibration of the load cell and HEPA filter integrity test (using PAO aerosol challenge) are recommended per ISO 14644-3.
Is the UV-C lamp automatically interlocked with the sash or door?
Yes—the UV lamp deactivates instantly when the front access panel is opened, and cannot be manually enabled during operation.
How is media temperature monitored during dispensing?
A PT100 probe embedded in the vessel holder provides continuous feedback; temperature setpoint and deviation alarms are configurable in the HMI.