TTL TTL-7 Ultra Pure Water System
| Brand | TTL |
|---|---|
| Origin | Beijing, China |
| Manufacturer Type | Manufacturer |
| Model | TTL-7 |
| Price Range | USD 1,400 – 4,200 (FOB) |
| Feed Water | Potable municipal tap water (TDS < 200 mg/L) |
| Product Flow Rate | 25 L/h |
| Resistivity | ≥10 MΩ·cm at 25 °C |
| Heavy Metals & Soluble Silica Removal Efficiency | >99% |
| Total Organic Carbon (TOC) | ≤10 ppb |
| Microbial Count | <0.001 CFU/mL |
| Endotoxin Level | <0.001 EU/mL |
| Particulates (>0.1 µm) | <1 particle/mL |
| Compliance | GB/T 6682–1992 Grade III water |
| Housing Material | Corrosion-resistant engineering plastic |
| Electrical/Water Path Isolation | Fully segregated design |
| Control Interface | Microprocessor-based with LCD display, Chinese menu (configurable for English firmware), real-time parameter monitoring, auto-diagnostic startup, timed dispensing, RO membrane auto-flush/manual flush, consumables life tracking, temperature & clock display, auto-drain function |
| Pre-treatment | Integrated sediment + activated carbon + polypropylene depth filtration |
| Core Purification Stages | Single-pass RO + mixed-bed ion exchange + 0.22 µm final filter |
| Optional Upgrade Path | Compatible with downstream Millipore (Merck) ultra-pure polishing modules (e.g., Milli-Q® IQ 7000 series feed interface) |
Overview
The TTL TTL-7 Ultra Pure Water System is an integrated, single-pass reverse osmosis (RO) and deionization (DI) purification platform engineered for laboratories requiring consistent, on-demand production of Type III reagent-grade water per ASTM D1193–2020 and GB/T 6682–1992 specifications. Designed for direct connection to potable municipal supply (TDS ≤200 mg/L), the system delivers 25 L/h of purified water with a minimum resistivity of 10 MΩ·cm at 25 °C, supported by comprehensive contaminant removal: >99% reduction of heavy metals and soluble silica, TOC ≤10 ppb, microbial load <0.001 CFU/mL, endotoxin <0.001 EU/mL, and particulate count 0.1 µm. Its architecture prioritizes operational safety and long-term reliability through full physical separation of electrical components and hydraulic pathways—eliminating moisture-induced short circuits or leakage-related failures. The TTL-7 serves as a primary pretreatment source for high-purity downstream systems, including Merck Millipore ultra-pure polishing units (e.g., Milli-Q® IQ 7000), enabling seamless integration into tiered water purification workflows.
Key Features
- Fully isolated electrical and hydraulic compartments—no shared enclosures or condensation-prone junctions
- Microprocessor-controlled operation with backlit LCD interface, real-time display of temperature, date/time, system status, and conductivity/resistivity trends
- Automated self-diagnostics at power-on, including pressure sensor validation, flow path integrity check, and RO membrane performance assessment
- Programmable RO membrane maintenance cycle: scheduled auto-flush (daily or user-defined interval) plus manual override capability
- Intelligent consumables management: algorithm-driven lifetime estimation for pre-filters, RO membrane, and mixed-bed resin with visual alert and log-tracked replacement history
- Corrosion-resistant polymer housing rated for continuous exposure to ambient lab humidity and incidental chemical splashes
- Timed dispensing mode with programmable volume (10–999 mL) and duration (1–999 s) for standardized sample preparation protocols
- Onboard temperature-compensated resistivity measurement (±0.1 °C resolution) with NIST-traceable calibration support
Sample Compatibility & Compliance
The TTL-7 produces water suitable for non-critical analytical applications—including buffer preparation, glassware rinsing, media formulation, and feed water for secondary ultra-pure systems. It meets the strictest national and international benchmarks for Type III reagent water: GB/T 6682–1992 (China), ASTM D1193–2020 (USA), and ISO 3696:1987 (Class 3). While not certified for GLP/GMP-regulated final product contact, its design supports audit-ready documentation via internal event logging (startup/shutdown timestamps, flush cycles, alarm triggers, and parameter modifications). All wetted materials comply with USP Class VI biocompatibility standards, and the system’s closed-loop drainage prevents cross-contamination during maintenance.
Software & Data Management
The embedded controller stores up to 30 days of operational data—including daily flow totals, cumulative runtime, RO rejection rate trends, and consumables usage—accessible via USB export (CSV format). Firmware supports configurable audit trail settings aligned with FDA 21 CFR Part 11 principles: user-level access control (admin/operator), electronic signature prompts for critical parameter changes, and immutable timestamped logs. Optional Ethernet or RS-485 interfaces enable integration with centralized laboratory infrastructure management (LIMS) platforms for remote monitoring and preventive maintenance scheduling.
Applications
- Feed water supply for Millipore Sigma Milli-Q®, Thermo Scientific Barnstead™, and ELGA LabWater ultra-pure polishing systems
- Preparation of HPLC mobile phase solvents, spectrophotometric blanks, and microbiological culture diluents
- Routine cleaning of pipettes, centrifuge rotors, and analytical balances where particulate-free rinse water is required
- Calibration standard dilution in environmental testing labs (EPA Method 200.7, ISO 17294-2)
- Supporting ISO/IEC 17025-accredited testing procedures requiring documented water quality traceability
FAQ
Does the TTL-7 meet ASTM D1193 Type I or Type II water specifications?
No—the TTL-7 is validated exclusively for ASTM D1193 Type III water. For Type I (≥18.2 MΩ·cm) or Type II (≥1 MΩ·cm) purity, pairing with a dedicated ultra-pure polishing module is required.
Can the system be connected to a building’s central water supply?
Yes—provided inlet pressure is maintained between 0.1–0.4 MPa and TDS remains ≤200 mg/L. A dedicated 1/4″ compression fitting and optional pressure regulator are recommended for stable operation.
Is firmware upgrade available in English language mode?
Yes—English-language firmware is factory-installable and fully supports all menu navigation, alarm messages, and data export functions without functional limitation.
What is the expected service life of the RO membrane under typical lab use?
With feed water TDS <150 mg/L and adherence to scheduled auto-flush protocols, the RO membrane maintains ≥95% rejection efficiency for 24–36 months; lifetime is logged and trended within the system’s maintenance dashboard.
Does the TTL-7 include validation documentation for ISO 17025 compliance?
The unit ships with a Factory Acceptance Test (FAT) report, material certifications for all wetted parts, and a calibration certificate for the resistivity sensor—sufficient for initial method qualification per ISO/IEC 17025 Clause 6.4.1.
