Digital Microbial Limit Filtration for Pharmaceutical QC

Product Introduction

In pharmaceutical quality control, reproducibility of test results and documentation of test parameters are not merely desirable — they are regulatory requirements. GMP guidelines mandate that each step of a microbial limit test must be documented, and that the conditions under which a test was performed must be traceable. Traditional mechanical filtration instruments provide no built-in mechanism for recording filtration time or settings, leaving operators to manually document parameters on paper records that are susceptible to transcription errors and inconsistencies.

The HM-WX3G microbial limit filtration system from HM Instruments was engineered to address these documentation and reproducibility challenges directly. The 5-inch LCD touchscreen provides a centralized interface for setting programmable timers on each of the three filtration channels, ensuring that every sample receives precisely the same filtration duration regardless of which technician is operating the instrument. Each channel is powered by its own independent diaphragm pump, guaranteeing consistent vacuum pressure even when all three stations are running simultaneously. Digital parameter recording automatically captures the filtration time and settings for each test run, creating an electronic record that supports GMP documentation requirements without relying on manual transcription. The anti-backflow protection mechanism and flame sterilization-compatible filter heads address the contamination control requirements that are critical in aseptic testing environments. For pharmaceutical QC laboratories that need to demonstrate method reproducibility during regulatory inspections, the HM-WX3G provides the digital traceability that mechanical instruments simply cannot offer.

Applications

• Pharmaceutical water system monitoring — Programmable timer-controlled membrane filtration for purified water and WFI with documented filtration parameters per USP 61 and ChP requirements
• Drug substance and product testing — Microbial limit examination of liquid pharmaceutical preparations with electronic records for batch release documentation
• Cleanroom environmental monitoring — Timed filtration of air and surface rinse samples with traceable parameter logs for classified area qualification
• Medical device rinse fluid testing — Membrane filtration of device extraction fluids per ISO 11737 with recorded test conditions
• Food and beverage quality assurance — Standardized filtration protocols for dairy, beverage, and bottled water microbial analysis with consistent timer settings
• Cosmetic microbiological testing — Microbial enumeration in water-based cosmetic formulations per ISO 17516 with documented test parameters
• Pharmaceutical raw material testing — Liquid raw material microbial limit testing with programmable filtration conditions for incoming material quality verification

Key Features & Advantages

1. 5-inch LCD touchscreen provides centralized control for all three channels with real-time parameter display and intuitive menu navigation.
2. Programmable timer for each channel ensures identical filtration duration across operators and shifts, eliminating inter-operator timing variability.
3. Dual built-in diaphragm pumps guarantee consistent vacuum pressure at every station, regardless of how many channels are operating simultaneously.
4. Digital parameter recording automatically captures filtration time and settings per run, creating traceable electronic records for GMP documentation.
5. Anti-backflow protection prevents liquid reverse flow, maintaining test integrity against accidental operational errors.
6. Flame sterilization-compatible filter heads allow rapid decontamination between consecutive test samples for aseptic workflow continuity.
7. Plug-in pump head structure enables quick disassembly for cleaning and supports multiple sterilization methods including autoclave and flame.
8. L304 stainless steel shell with brushed finish withstands repeated disinfection and resists corrosion from common laboratory cleaning agents.
9. Direct drainage design discharges filtrate immediately, eliminating collection bottles and their associated cleaning validation requirements.
10. Compatible with disposable Ø47mm / 100 mL filter cups for single-use convenience, or reusable stainless steel filter cups for cost-effective applications.
11. 7W low power consumption and compact 363 x 238 x 222 mm footprint suit laboratories with limited bench space and energy budgets.
12. 5.6 kg lightweight design facilitates installation inside laminar flow cabinets and biological safety cabinets for aseptic operations.
13. ISO 9001 certified quality management ensures consistent instrument performance and manufacturing traceability.

Technical Specifications

FAQ

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