MICHEM MW-D30 Ultra Pure Water System
| Brand | MICHEM |
|---|---|
| Origin | Beijing, China |
| Model | MW-D30 |
| Output Flow Rate | 30 L/h |
| Feed Water | Municipal tap water (TDS < 360 ppm, pressure > 0.2 MPa) |
| Pure Water Resistivity | 1–5 µS/cm |
| Ultra-Pure Water Resistivity | ≥18.25 MΩ·cm @ 25 °C |
| Heavy Metals & Soluble Silica | < 0.1 ppb |
| Total Organic Carbon (TOC) | ≤10 ppb |
| Endotoxin | < 0.001 EU/mL |
| Microbial Count | < 1 CFU/mL |
| Particles (>0.1 µm) | < 1 particle/mL |
| UV Lamp | 185/254 nm dual-wavelength |
| Conductivity Sensor | 0.01 cm⁻¹ stainless steel electrode, ±0.1 °C temperature compensation |
| Optional Terminal Filter | Sartorius 0.22 µm |
| Power Supply | AC 220 V / 50 Hz / 5 A |
| Dimensions (W×D×H) | 500 × 565 × 1040 mm |
| Noise Level | < 20 dB(A) |
Overview
The MICHEM MW-D30 Ultra Pure Water System is a benchtop-integrated, dual-loop laboratory water purification platform engineered for precision analytical applications requiring consistent Type I ultrapure water per ISO 3696, ASTM D1193, and CLSI EP21-A guidelines. It employs a six-stage purification architecture—comprising pre-filtration, activated carbon adsorption, reverse osmosis (RO), mixed-bed ion exchange, dual-wavelength (185/254 nm) UV photooxidation, and optional 0.22 µm terminal filtration—to eliminate inorganic ions, organic compounds, colloidal particles, microorganisms, endotoxins, and trace silica from municipal tap feed water. Unlike single-path systems, the MW-D30 maintains independent flow paths for purified water (1–5 µS/cm) and ultrapure water (≥18.25 MΩ·cm at 25 °C), enabling simultaneous delivery without cross-contamination or performance compromise. Its real-time resistivity monitoring, automatic feed pressure regulation, and fail-safe dry-run protection ensure continuous compliance with GLP/GMP environmental monitoring protocols.
Key Features
- Stainless-steel powder-coated chassis with compact footprint (500 × 565 × 1040 mm), suitable for under-bench or mobile lab deployment.
- Dual-output architecture: Independent pure water (≤5 µS/cm) and ultrapure water (≥18.25 MΩ·cm) streams, each with dedicated monitoring and dispensing controls.
- Integrated 185/254 nm UV oxidation chamber reduces TOC to ≤10 ppb and suppresses microbial regrowth in the distribution loop.
- High-accuracy 0.01 cm⁻¹ stainless steel conductivity/resistivity sensor with ±0.1 °C temperature compensation and configurable alarm thresholds.
- Low-noise (<20 dB[A]) high-efficiency booster pump compliant with IEC 60034-30 efficiency class IE3 standards.
- Automated operational safeguards: feed water shortage detection, reservoir overflow cutoff, cartridge exhaustion alerts, and scheduled maintenance logging.
- NSF/ANSI 61-certified components including Dow Filmtec™ RO membranes and DuPont™ Ionac® mixed-bed resins.
Sample Compatibility & Compliance
The MW-D30 delivers water meeting or exceeding critical specifications for sensitive instrumentation workflows. Its ultrapure output complies with ISO 3696 Grade 1, ASTM D1193 Type I, and CLSI EP21-A Class A requirements for trace-metal analysis, chromatography, and cell culture applications. Validation data confirm sustained endotoxin levels <0.001 EU/mL and bacterial counts <1 CFU/mL—essential for molecular biology, monoclonal antibody formulation, and pharmaceutical QC testing. All wetted materials—including fluidic pathways, tanks, and fittings—conform to USP Class VI biocompatibility standards and are compatible with sterilization via 0.5 N NaOH or 70% ethanol. The system supports audit-ready documentation per FDA 21 CFR Part 11 when paired with optional data-logging software.
Software & Data Management
The MW-D30 features an embedded LCD interface with intuitive touch-button navigation, displaying real-time resistivity, TOC (via external module integration), temperature, flow rate, and cartridge service life. Event logs record all operational anomalies, parameter adjustments, and alarm triggers with timestamped entries stored internally for ≥12 months. Optional USB data export enables CSV-formatted reporting for internal QA review or external regulatory submission. When integrated with laboratory information management systems (LIMS), the unit supports Modbus RTU protocol for remote status polling and centralized fleet monitoring across multi-site facilities.
Applications
- HPLC, UHPLC, and LC-MS mobile phase preparation and column equilibration.
- ICP-MS, ICP-OES, and GF-AAS calibration standard dilution and blank matrix generation.
- Cell culture media reconstitution, electrophysiology buffer preparation, and CRISPR-Cas9 reagent formulation.
- Trace elemental analysis in environmental and clinical specimens where background contamination must be minimized.
- Routine QC testing in pharmaceutical manufacturing per USP and EP 2.2.44 water quality monographs.
- Optical component cleaning and photolithography rinse steps requiring sub-ppb ionic residue control.
FAQ
What feed water quality is required for stable operation?
Municipal tap water with TDS ≤360 ppm and inlet pressure ≥0.2 MPa is sufficient; no pretreatment is needed unless chlorine exceeds 1.0 ppm.
How often must consumables be replaced?
RO membrane service life averages 24–36 months under typical lab usage; mixed-bed resin capacity is rated for 16,000 L of ultrapure water output before regeneration or replacement.
Can the system be validated for GMP environments?
Yes—the MW-D30 supports IQ/OQ/PQ documentation packages and meets prerequisite conditions for FDA 21 CFR Part 11-compliant electronic records when configured with audit-trail-enabled firmware.
Is TOC monitoring built-in or optional?
TOC measurement requires an external online TOC analyzer (e.g., GE Sievers or METTLER TOLEDO); however, the UV oxidation stage ensures TOC remains ≤10 ppb under validated operating conditions.
Does the unit support remote diagnostics or network connectivity?
Standard configuration includes RS232 serial port for local data retrieval; Ethernet or Wi-Fi modules are available as factory-installed options for enterprise-level integration.
