HHitech Dura Series Ultra-Pure Water System

Overview

The HHitech Dura Series Ultra-Pure Water System is an integrated, benchtop-grade purification platform engineered for laboratories requiring consistent, high-fidelity Type I ultrapure water per ISO 3696:1987, ASTM D1193-20, and CLSI EP21-A guidelines. It employs a rigorously validated multi-stage purification architecture—comprising dual-stage reverse osmosis (RO), electrodeionization (EDI)-compatible deionization, dual-wavelength UV photo-oxidation, and terminal ultrafiltration—to achieve stable resistivity ≥18.2 MΩ·cm at 25 °C, with total organic carbon (TOC) consistently maintained below 3 ppb in F- and V-series configurations. The system’s core design prioritizes reproducibility under variable feed water conditions, leveraging a proprietary dual-pump RO circuit with intermediate storage to decouple pressure fluctuations and ensure uniform salt rejection across diverse municipal, distilled, or pre-treated source waters.

Key Features

• Triple-pump architecture: Dedicated primary RO booster pump, secondary RO booster pump, and independent recirculation/disinfection pump—enabling simultaneous production, loop circulation, and periodic chemical sanitization without interrupting water delivery.
• Three-point real-time water quality monitoring: Independent conductivity/resistivity sensors continuously track feed water, RO permeate, and final ultrapure water output—each linked to configurable alarm thresholds compliant with GLP audit requirements.
• On-demand chemical disinfection protocol: Integrated tablet-based dosing system activates a fully automated, timed sanitization cycle—including recirculation, contact dwell, and thorough flush—validated to reduce biofilm-associated colony-forming units by ≥4-log reduction.
• Dual-wavelength UV oxidation module: 185 nm photons generate hydroxyl radicals for organic mineralization; 254 nm radiation delivers germicidal action—both housed within a passivated 316L stainless steel reaction chamber to prevent metallic leaching and maintain low TOC baseline.
• Terminal double-layer ultrafiltration: PES membranes configured in series (0.45 µm + 0.1 µm) provide redundant microbial retention, validated to deliver <0.01 CFU/mL and 0.1 µm), meeting stringent requirements for cell culture, qPCR, and HPLC mobile phase preparation.
• NSF-certified fluid path: All wetted components—including tubing, quick-connect fittings, and housing seals—carry NSF/ANSI Standard 58 and 61 certification, minimizing extractables and ensuring compliance with USP water quality expectations.

Sample Compatibility & Compliance

The Dura Series supports feed water inputs ranging from distilled and single-pass RO to municipal tap water pretreated via optional sediment/carbon prefiltration. Its adaptive dual-stage RO design maintains stable performance across inlet TDS levels up to 500 ppm, with automatic pressure compensation and staged recovery optimization. All models conform to ISO 15195:2018 for calibration traceability of conductivity sensors and support full electronic audit trails per FDA 21 CFR Part 11 when paired with HHitech’s optional LabLink software suite. System logs—including timestamped resistivity values, temperature, alarm events, and consumable usage counters—are exportable in CSV format for internal QA review or external regulatory submission.

Software & Data Management

Equipped with RS232 and USB interfaces, the Dura Series enables direct connection to laboratory PCs or LIMS environments. Built-in firmware records second-by-second data from all three conductivity sensors plus NTC temperature readings, storing up to 30 days of continuous operation history onboard. Data export supports time-synchronized alignment across sensor channels, facilitating root-cause analysis during QC investigations. Optional LabLink software provides graphical trend visualization, customizable alert dashboards, and automated report generation aligned with ISO/IEC 17025 documentation standards. All stored parameters are write-protected and tamper-evident, satisfying GLP requirement for data integrity and reviewer accountability.

Applications

This system serves as a primary water source for analytical instrumentation demanding ultra-low background interference—including ICP-MS sample introduction, LC-MS mobile phase preparation, and atomic absorption spectroscopy standards dilution. Its endotoxin- and nuclease-free variants (Dura V and Dura FV) are routinely deployed in molecular biology workflows such as CRISPR-Cas9 editing, single-cell RNA sequencing library prep, and sterile tissue dissociation buffers. The low-TOC performance also supports trace metal analysis in environmental testing labs accredited to ISO/IEC 17025, while its compact footprint and quiet operation make it suitable for shared core facilities and cleanroom-adjacent installation.

FAQ

What feed water quality is required to achieve rated UP water specifications?
Distilled water, deionized water, or single-pass RO water is recommended; inlet TDS should not exceed 500 ppm. For higher-salinity sources, optional pretreatment modules (e.g., activated carbon + 5-µm sediment filter) are available.
How often must consumables be replaced?
RO membranes typically last 2–3 years depending on feed water quality; UP polishing cartridges require replacement every 6–12 months based on usage volume and real-time resistivity decay trends tracked via system diagnostics.
Is the system compatible with remote monitoring platforms?
Yes—via optional Ethernet gateway add-on, enabling SNMP-based integration into facility-wide building management systems (BMS) or centralized lab infrastructure dashboards.
Does the system meet USP Purified Water and Water for Injection (WFI) specifications?
While not designed for WFI generation (which requires distillation or equivalent validated vapor compression), the Dura V/FV models exceed USP limits for Conductivity, TOC, Endotoxins, and Microbial Enumeration when operated under validated conditions and maintained per manufacturer-recommended protocols.
Can the system be validated per GMP Annex 15 or IQ/OQ/PQ frameworks?
Yes—HHitech provides comprehensive validation documentation packages, including URS templates, FAT/SAT reports, and blank IQ/OQ/PQ protocols aligned with EU GMP and PIC/S TR 13 guidelines.