HHitech Dura Elit Ultra Pure Water System with Full-Touch Interface
| Brand | HHitech |
|---|---|
| Model | Dura Elit |
| Origin | Shanghai, China |
| Category | Laboratory Ultra-Pure Water Purification System |
| Pure Water Grade | Type I (ASTM D1193-20) |
| RO Output | 10 L/h |
| UP Output | up to 2.0 L/min (with tank) |
| Resistivity (UP) | 18.2 MΩ·cm @ 25°C |
| TOC (UP) | <3–10 ppb (configurable by model) |
| Endotoxin | <0.001 EU/mL |
| Bacteria | <0.01 CFU/mL |
| Particles (>0.1 µm) | <1/mL |
| RNase/DNase | <1 pg/mL / <5 pg/mL |
| UV Wavelengths | 254 nm & 185 nm |
| UF MWCO | 5000 Da |
| Final Filtration | Dual-layer PES membrane (0.45 + 0.1 µm) |
| Feed Water | Municipal tap water (5–45°C, 1.0–4.0 kgf/cm²) |
| Dimensions (W×D×H) | 545 × 470 × 649 mm |
| Weight | ~35 kg |
| Power | 220–240 V, 50/60 Hz, 240 W |
Overview
The HHitech Dura Elit Ultra Pure Water System is an engineered solution for laboratories requiring continuous, on-demand Type I ultrapure water compliant with ASTM D1193-20, ISO 3696:1987, and CLSI EP21-A guidelines. It employs a multi-stage purification architecture grounded in proven physical and electrochemical separation principles: reverse osmosis (RO) using Dow FilmTec™ high-rejection membranes, dual-wavelength (254/185 nm) UV photo-oxidation, electrodeionization (EDI)-compatible mixed-bed deionization with DuPont™ nuclear-grade ion exchange resins, ultrafiltration (5000 Da MWCO), and terminal sterile filtration via dual-layer polyethersulfone (PES) membranes. The system operates under closed-loop recirculation with programmable flow dynamics, maintaining resistivity stability at ≥18.2 MΩ·cm while suppressing microbial regrowth and organic leaching—critical for sensitive applications including HPLC mobile phase preparation, cell culture media formulation, molecular biology workflows, and trace elemental analysis.
Key Features
- 5.0-inch full-color capacitive touchscreen interface with animated, context-aware menus—enabling intuitive navigation without physical buttons or mechanical wear.
- Integrated remote mobile dispensing arm with ergonomic pipette-style handle; supports both real-time and precision volumetric dispensing (10–999,999 mL) and quality-triggered dispensing (0–18.25 MΩ·cm).
- Real-time triple-point water quality monitoring (RO, DI, UP) with simultaneous display of resistivity, temperature, flow rate, and cumulative volume—no sample withdrawal required.
- NSF-certified quick-connect fluidic architecture across all wetted components; tubing, fittings, and valves conform to NSF/ANSI Standard 61 for potable water contact safety.
- Automated maintenance protocols: programmable RO membrane antiscalant flush cycles, manual/automatic UV chamber and distribution loop disinfection, tank-level controlled refill, and scheduled drain sequences.
- Intelligent consumables management: configurable lifetime thresholds for PP, KDF, AC, RO, DI, UP, UV, UF, and TF modules; runtime tracking with preemptive replacement alerts and usage logging.
- Dual independent storage: 50 L conical PE tank with integrated air filter (activated carbon + 0.2 µm hydrophobic vent) and internal buffer reservoir—both UV-compatible and CO₂-trapping.
Sample Compatibility & Compliance
The Dura Elit meets stringent regulatory expectations for analytical and life science environments. Its design supports GLP/GMP-aligned operation through password-protected dual-access control (factory + user levels), audit-trail-capable event logging (including alarms, consumables changes, and manual interventions), and timestamped USB-exportable records compliant with FDA 21 CFR Part 11 requirements for electronic records and signatures. All final-stage filtration components—including the 0.1 µm PES terminal filter—are certified endotoxin-free and DNase/RNase-free per manufacturer validation reports. The system’s ≤0.001 EU/mL endotoxin specification satisfies USP and EP 2.6.14 criteria for water for injection (WFI)-adjacent applications. TOC reduction to <3 ppb (in FV/TOC variants) aligns with ASTM D5127 for semiconductor-grade water and ISO 14644-1 Class 5 cleanroom support.
Software & Data Management
Embedded firmware includes a non-volatile SD card module storing ≥12 months of operational history—including hourly resistivity/TOC trends, alarm timestamps, dispensing logs, and consumables utilization metrics. Data export is performed via standard USB 2.0 interface using CSV-formatted files compatible with LIMS integration and statistical process control (SPC) platforms. The system supports configurable auto-standby (0–60 min) and scheduled shutdown (0–24 h), minimizing idle power draw while preserving calibration integrity. All parameter modifications—including time/date settings, alarm thresholds, and cycle durations—are subject to role-based authentication, ensuring configuration consistency across shifts and operators.
Applications
- HPLC, UHPLC, and LC-MS mobile phase and blank preparation where low TOC and silica content are essential to prevent column fouling and baseline drift.
- Cell and tissue culture media reconstitution requiring endotoxin- and nuclease-free water to avoid cytotoxicity and false signaling in immunological assays.
- Atomic absorption spectroscopy (AAS), ICP-OES, and ICP-MS diluent preparation where sub-ppt metal contamination must be excluded.
- PCR, qRT-PCR, CRISPR editing, and next-generation sequencing library prep—dependent on RNase/DNase-free conditions to preserve nucleic acid integrity.
- Electrophysiology and patch-clamp experiments demanding stable ionic background and minimal organic interference.
FAQ
What is the minimum feed water quality required for optimal Dura Elit performance?
Municipal tap water meeting WHO Guidelines for Drinking-water Quality is sufficient; however, inlet TDS should remain below 500 ppm and free chlorine concentration below 0.5 mg/L to maximize RO membrane service life.
Can the system be integrated into a building-wide water distribution network?
No—the Dura Elit is designed as a point-of-use system with integrated storage and recirculation; it does not support direct pressurized manifold connections or centralized loop integration.
How often must consumables be replaced under typical lab usage?
RO membranes typically last 2–3 years; DI cartridges 6–12 months; UV lamps 12 months; UF and terminal filters 6–12 months—exact intervals depend on feed water quality and daily throughput, all tracked automatically by the onboard monitoring system.
Is the 50 L external tank included standard or optional?
Yes—the conical PE tank with air filter and UV compatibility is supplied as standard equipment with every Dura Elit configuration.
Does the system support third-party TOC analyzers or external data loggers?
While no native analog/digital output ports are provided, the USB-exported CSV dataset contains all critical parameters required for external correlation and trending via custom scripts or SCADA interfaces.
