Palintest Potatest2 Enhanced Portable Microbial Detection Kit

Overview

The Palintest Potatest2 Enhanced Portable Microbial Detection Kit is a field-deployable, semi-automatic microbial enumeration system engineered for rapid, standardized assessment of indicator microorganisms in drinking water and environmental water samples. It operates on the principle of membrane filtration followed by selective incubation and colony enumeration — a method aligned with ISO 9308-1 (E. coli and coliform bacteria), ISO 8199 (general microbiological monitoring), and US EPA Method 1603. Unlike conventional lab-based protocols requiring sample transport and centralized incubation, the Potatest2 integrates sampling, membrane filtration, inoculation, and temperature-controlled incubation into a single portable workflow. This architecture minimizes time-to-result (typically <24 h for thermotolerant coliforms), eliminates cold-chain dependency, and reduces the risk of post-sampling microbial die-off or proliferation that compromises data integrity. Designed for use by field technicians, public health responders, and municipal water quality officers, the system maintains metrological traceability through NIST-traceable temperature calibration and conforms to GLP-aligned operational documentation requirements.

Key Features

• Dual independent digital incubators housed in a single ruggedized chassis — enabling simultaneous incubation of membrane filters for total coliforms (37°C) and thermotolerant coliforms/E. coli (44°C) under ISO-compliant conditions.
• Active thermal management system featuring laser-balanced thermistor sensing and integrated cooling capability — ensuring ±0.5°C stability across ambient temperatures up to 45°C, critical for deployment in tropical or unconditioned field environments.
• Multi-source power architecture: supports continuous operation via rechargeable Li-ion battery (≥12 h at 37°C), 12 V DC vehicle socket, or universal AC adapter — eliminating infrastructure dependency during emergency response or remote surveillance.
• Pre-sterilized, WHO-recommended dehydrated culture media formats (e.g., MI Agar, mEndo LES, TBX) supplied in ready-to-hydrate sachets — eliminating on-site media preparation, reducing contamination risk, and ensuring batch-to-batch consistency per ISO 11133.
• Embedded microcontroller with multilingual UI (English, Chinese, Spanish, French) and optional voice-guided operation — supporting operator training scalability and minimizing procedural errors in low-literacy or high-noise field settings.

Sample Compatibility & Compliance

The Potatest2 is validated for use with potable water, groundwater, surface water, and treated effluent matrices. It accommodates standard 47 mm diameter cellulose ester or polycarbonate membrane filters (pore size 0.45 µm) and interfaces seamlessly with Palintest-supplied filtration manifolds and vacuum pumps. All consumables comply with ISO 7218 (microbiology of food and animal feeding stuffs — general requirements and guidance for microbiological examinations) and WHO Guidelines for Drinking-water Quality (4th ed., Annex 2). The system’s incubation profiles are preconfigured to meet ISO/IEC 17025-accredited laboratories’ internal method validation criteria for thermotolerant coliform enumeration. Full audit trails — including timestamped incubation start/end, setpoint deviations, and operator ID (where configured) — support compliance with FDA 21 CFR Part 11 when used in regulated utilities or contract testing organizations.

Software & Data Management

Data capture and reporting are facilitated through the Palintest Connect desktop application (Windows/macOS compatible) and companion mobile app (iOS/Android). The system logs incubation parameters (temperature profile, duration, ambient offset), user inputs, and manual colony counts entered via touchscreen or voice command. All records are exported in CSV or PDF format with embedded metadata (device serial number, firmware version, calibration certificate ID). The software enforces electronic signature workflows and generates GLP-compliant reports containing raw counts, calculated CFU/100 mL values, method reference codes, and uncertainty statements derived from ISO/IEC 17025 Annex A.3. Data synchronization supports encrypted cloud backup (AWS-hosted, GDPR-compliant) and local network archiving via SMB protocol.

Applications

• Routine surveillance of municipal drinking water distribution systems, including tap points, storage reservoirs, and point-of-use devices.
• Post-disaster water safety verification following floods, earthquakes, or infrastructure failure — deployed by WHO Emergency Response Teams and UNICEF WASH units.
• Regulatory compliance monitoring for small water suppliers operating under EPA Total Coliform Rule or EU Drinking Water Directive (2020/2184).
• Field validation of decentralized treatment technologies (e.g., solar disinfection, biosand filters, chlorination units) in low-resource settings.
• Educational use in university environmental microbiology labs for experiential learning in standardized membrane filtration techniques.

FAQ

Does the Potatest2 require laboratory accreditation to be used for regulatory reporting?
No — but data generated must be interpreted within the context of locally accepted standards (e.g., ISO 9308-1, EPA Method 1603). Accredited labs may integrate Potatest2 into their scope via method validation per ISO/IEC 17025 Clause 7.2.2.
Can the incubators be calibrated in the field?
Yes — using Palintest-certified NIST-traceable digital thermometers and the built-in calibration mode accessible via service menu. Calibration certificates are issued per ISO/IEC 17025 Clause 6.5.
Is the system compatible with third-party membrane filters or media?
It accepts any 47 mm, 0.45 µm pore-size filter compliant with ISO 7704. Media compatibility is limited to formulations validated for thermotolerant coliform detection; Palintest does not guarantee performance with non-certified media.
What is the recommended maintenance interval for the rechargeable battery?
Battery health should be verified every 6 months using the onboard diagnostics tool; full replacement is recommended after 300 charge cycles or 24 months of field use, whichever occurs first.
How is data integrity ensured during USB transfer to external devices?
All transfers employ SHA-256 checksum verification. The firmware implements write-once logging for critical events (e.g., temperature excursions >±1.0°C), preventing post-hoc modification of raw incubation records.