Huan Kai SmartCounter-4K Automated Colony Counter

Overview

The Huan Kai SmartCounter-4K Automated Colony Counter is an ISO-compliant, image-based microbial enumeration system engineered for precision, reproducibility, and regulatory traceability in GLP- and GMP-aligned laboratories. It employs high-resolution digital imaging combined with adaptive threshold segmentation algorithms to quantify viable microorganisms on solid culture media—including standard pour plates, spread plates, spiral plating, membrane filtration (grid-patterned filters), and selective agar formulations. Unlike manual or semi-automated counters reliant on fixed illumination or binary thresholding, the SmartCounter-4K integrates real-time parameter tuning, multi-spectral light control, and intelligent morphological clustering to resolve overlapping colonies, suppress pen-mark interference, and maintain accuracy across heterogeneous colony pigmentation and background contrast. Its hardware architecture—featuring a true 4K color CMOS sensor and ultra-low-distortion optical lens—ensures sub-millimeter spatial fidelity critical for USP , ISO 4833-1:2013, and FDA Bacteriological Analytical Manual (BAM) Chapter 3 validation requirements.

Key Features

• True 4K color imaging system (8.29 MP) with ultra-low-distortion optics for consistent geometric accuracy and minimal radial distortion across full-field capture.
• Dual-axis, independently controllable LED illumination: top-light intensity and bottom-light color temperature are continuously adjustable to optimize contrast for chromogenic, chromogenic-selective, and non-pigmented media (e.g., PCA, TSA, VRBA, mFC, R2A).
• Real-time parameter adjustment via intuitive GUI: users dynamically tune colony size range (0.2–10 mm), circularity threshold, color adaptability (supports up to 8 distinct hue classes), and contrast enhancement—all with live preview of segmentation output.
• Advanced colony separation algorithm: automatically resolves clustered or confluent colonies using watershed-based splitting calibrated against edge gradient magnitude and local density gradients.
• No-driver, portable software architecture: executable-only deployment compatible with Windows 7 through Windows 11; no registry edits or admin privileges required.
• Comprehensive plate format support: standard 90 mm and 100 mm Petri dishes, spiral plates (with calibration curve import), grid-filter membranes (including 47 mm and 50 mm diameter), and quadrant-streaked plates.
• Regulatory-ready security framework: optional three-tier role-based access control (Administrator / Supervisor / Technician), full audit trail logging (user ID, timestamp, parameter changes, result exports), and immutable result-image binding for data integrity.

Sample Compatibility & Compliance

The SmartCounter-4K is validated for use with all conventional microbiological culture media used in food safety (ISO 6887, ISO 7218), pharmaceutical sterility testing (USP , EP 2.6.12), clinical diagnostics (CLSI M07-A11), and environmental monitoring (ISO 11731). It accommodates opaque, translucent, and chromogenic substrates—including MacConkey Agar, Baird-Parker Agar, XLD, and CHROMagar™ formulations—without requiring media-specific firmware updates. All counting results retain original image metadata (EXIF + custom JSON header) compliant with ALCOA+ principles (Attributable, Legible, Contemporaneous, Original, Accurate), supporting 21 CFR Part 11 readiness when deployed with validated electronic signature modules.

Software & Data Management

The embedded software provides native bilingual UI (English/Chinese), automated report generation (PDF/CSV/XLSX), and hierarchical data export protocols. Each counted plate generates a timestamped record containing raw image, processed binary mask, colony coordinate list (X/Y/pixel area/diameter), statistical summary (CFU/mL, CFU/g, % recovery), and user-defined annotations. Historical results are indexed by project ID, operator ID, date/time, and assay type—enabling rapid retrieval for internal audits or regulatory inspections. Optional database integration supports ODBC-compliant LIMS connectivity (e.g., Thermo Fisher SampleManager, LabVantage) and structured query via SQL views.

Applications

The SmartCounter-4K serves as a primary enumeration tool across regulated and research environments: routine QC in dairy and beverage production (total viable count, coliforms, yeasts/molds); environmental monitoring in cleanrooms (ISO 14644-1 classified areas); pharmaceutical water system validation (PW, WFI per USP ); antimicrobial efficacy testing (ASTM E2149, ISO 22196); and academic microbiology workflows involving mutant screening, biofilm quantification, or antibiotic resistance profiling. Its ability to distinguish up to eight simultaneous color classes enables parallel enumeration of mixed-species cultures on differential media—reducing assay turnaround time by >60% versus manual methods.

FAQ

Does the SmartCounter-4K comply with FDA 21 CFR Part 11 requirements?

Yes—when configured with optional electronic signature and audit trail modules, it meets Part 11 criteria for electronic records and signatures, including role-based access, immutable logs, and secure data binding.

Can it process spiral plates calibrated to ISO 7218 Annex D?

Yes—the software accepts user-uploaded calibration curves and auto-calculates CFU/mL based on spiral plater model-specific dilution factors and rotation counts.

Is external IT infrastructure required for data backup?

No—local storage (SSD/HDD) retains full image-result pairs indefinitely; optional network share or cloud sync can be enabled without compromising offline operation.

What is the minimum colony size reliably detected?

0.2 mm diameter under optimal contrast conditions (validated per ISO 4833-1:2013 Annex C using Micrococcus luteus ATCC 10240 reference strains).

How does the system handle pen markings or labelling on Petri dish lids?

An integrated anti-pen-interference algorithm identifies and excludes non-biological high-contrast linear artifacts without requiring manual ROI masking or pre-scanning steps.