HKM Smartcounter-4K Series Automated Colony Counter

Overview

The HKM Smartcounter-4K Series is a fully automated digital colony counter engineered for precision, reproducibility, and regulatory compliance in microbiological quality control laboratories. Based on high-resolution digital imaging and adaptive computer vision algorithms, the system performs quantitative analysis of microbial colonies grown on solid agar media—leveraging true-color 4K CMOS imaging, distortion-free optics, and dual-axis LED illumination to ensure consistent image acquisition under variable environmental lighting conditions. Unlike manual or semi-automated counters, the Smartcounter-4K eliminates subjective interpretation bias by applying validated image segmentation logic to distinguish individual colonies—even those exhibiting partial adhesion, low contrast, or heterogeneous morphology. Its architecture supports both routine enumeration (e.g., total viable count, aerobic plate count) and specialized applications including grid-membrane filtration analysis and inhibition zone measurement, making it suitable for accredited testing labs operating under ISO 7218, ISO 4833-1, USP , and AOAC Official Methods.

Key Features

• True-color 4K imaging sensor (8.29 megapixels) coupled with an apochromatic optical lens assembly delivering sub-0.2 mm spatial resolution and minimal geometric distortion.
• Dual-axis, independently controllable LED illumination system: top-light with adjustable intensity and bottom-light with tunable color temperature (select models), optimized to suppress ambient light interference and enhance contrast across diverse media types (e.g., chromogenic, selective, and differential agars).
• Open-platform mechanical design enabling rapid, ergonomic placement and retrieval of Petri dishes (up to 150 mm diameter) without lid removal or repositioning.
• Patented colony recognition engine featuring adaptive thresholding, multi-scale morphological filtering, and AI-assisted cluster splitting—capable of resolving fused colonies with >98.5% accuracy under standardized test conditions (per internal validation protocol HKM-CC-VP-2023).
• Interactive parameter tuning interface allowing real-time adjustment of sensitivity, size range, color channel weighting, and edge detection strength—without requiring programming expertise.
• Three-tier role-based access control (RBAC) supporting administrator, supervisor, and operator accounts; includes password-protected account creation/deletion, function-level privilege assignment, and session timeout enforcement.
• Comprehensive audit trail module logging all user actions—including image acquisition, parameter modification, result editing, export events, and login/logout timestamps—with immutable timestamped records exportable in CSV or PDF format.

Sample Compatibility & Compliance

The Smartcounter-4K accommodates standard Petri dishes (90 mm, 100 mm, and 150 mm), membrane filters (e.g., 47 mm grid membranes), and custom-shaped plates within mechanical constraints. It supports enumeration on nutrient agar, PCA, VRBA, MRS, Sabouraud dextrose agar, and chromogenic media (e.g., CHROMagar Candida, Brilliance UTI). The system’s software implements data integrity safeguards aligned with ISO/IEC 17025:2017 Clause 7.5.2 (control of data and information management) and FDA 21 CFR Part 11 Subpart B (electronic records and signatures), including encrypted local storage, automatic image-result binding, and tamper-evident audit logs. All firmware and application binaries are digitally signed and version-controlled per HKM’s internal software development lifecycle (SDLC) policy.

Software & Data Management

The Smartcounter Control Suite (v4.x) provides bilingual UI (English/Chinese), intuitive workflow navigation, and modular functionality mapping to ISO 15197 and CLSI EP23-A validation frameworks. Raw images and processed results are stored in a relational SQLite database with SHA-256 checksum verification. Statistical outputs—including colony counts, size distribution histograms, color classification matrices, and inhibition zone diameters—are exportable in XLSX and PDF formats with embedded metadata (operator ID, timestamp, instrument serial number, assay parameters). Batch processing mode enables concurrent analysis of up to 24 plates with auto-generated summary reports. All exported files retain cryptographic hash references to original image archives, satisfying chain-of-custody requirements for regulatory submissions.

Applications

This instrument is routinely deployed in food safety laboratories (ISO 6579, ISO 16649), pharmaceutical QC (USP , EP 2.6.12), clinical microbiology (CLSI M07), cosmetic preservative efficacy testing (ISO 11930), and environmental monitoring (ISO 14698). Specific use cases include: enumeration of Escherichia coli and coliforms in water samples using membrane filtration; quantification of lactic acid bacteria in fermented dairy products; viability assessment of probiotic formulations; detection of Candida albicans on chromogenic agar; and antimicrobial susceptibility screening via disk diffusion assays. Its grid-membrane capability extends utility to air and surface sampling protocols compliant with ISO 14698-1.

FAQ

Does the Smartcounter-4K comply with FDA 21 CFR Part 11?
Yes—the system implements electronic signature controls, audit trail logging, and secure user authentication mechanisms consistent with Part 11 Subpart B requirements for closed systems.
Can the software distinguish colonies of different colors on the same plate?
Yes—multi-channel color segmentation algorithms classify colonies by dominant hue, saturation, and luminance values, supporting simultaneous enumeration of mixed-species cultures on chromogenic media.
Is manual correction supported after automated counting?
Yes—users may add, delete, or reclassify individual colonies via point-and-click interaction; all modifications are recorded in the audit log with operator ID and timestamp.
What is the smallest colony size the system can reliably detect?
Under optimal imaging conditions (standardized lighting, 90 mm dish, nutrient agar), the minimum resolvable colony diameter is 0.2 mm.
How is data security ensured during network transfer or local storage?
All image-result pairs are stored with AES-256 encryption at rest; export functions enforce TLS 1.2+ for network transmission when integrated with enterprise file servers.
Does the system support LIMS integration?
Yes—via configurable RESTful API endpoints and HL7-compliant message templates, enabling bidirectional synchronization with major laboratory information management systems (e.g., LabWare, STARLIMS, Thermo Fisher SampleManager).