HM-WX3G Microbial Limit Tester

Product Introduction

The HM-WX3G from HM Instruments is a three-station microbial limit filtration system equipped with a 5-inch LCD touchscreen for intuitive digital control. Built on the negative-pressure membrane filtration principle, the instrument captures microorganisms on a filter membrane for subsequent culture and colony counting. Each of the three filtration channels is powered by its own independent diaphragm pump, ensuring consistent vacuum pressure across all stations regardless of simultaneous or individual operation. The touchscreen interface provides programmable timer settings that eliminate timing inconsistencies between operators, while digital parameter recording supports documentation requirements in regulated pharmaceutical environments. The L304 stainless steel shell with direct drainage design simplifies workflow and cleaning. Compatible with disposable Ø47mm filter cups of 100 mL capacity, the HM-WX3G bridges the gap between basic mechanical instruments and advanced documentation-capable systems, making it well-suited for pharmaceutical QC laboratories that require reproducible, traceable microbial limit testing results.

Applications

• Pharmaceutical water testing — purified water and WFI microbial limit examination with digital records

• Medical device water testing — production water microbial quality verification with timer-controlled filtration

• Food and beverage testing — bottled water, juice, and dairy product microbiological analysis

• Disease control — drinking water and environmental water bacterial monitoring with documented parameters

• Chemical industry — process water microbial limit testing with reproducible timer settings

• Pharmaceutical raw material testing — liquid raw material microbial enumeration per pharmacopeia

Key Features

1. 5-inch LCD touchscreen with intuitive menu navigation and real-time filtration parameter display.

2. Dual built-in diaphragm pumps ensuring consistent vacuum across all stations during simultaneous operation.

3. Programmable timer control for each channel, eliminating inter-operator timing variability and supporting standardized protocols.

4. Digital parameter recording captures filtration time and settings for each test run, supporting GMP documentation requirements.

5. L304 stainless steel shell with brushed finish provides corrosion resistance and facilitates surface disinfection for cleanroom compliance.

6. Direct drainage design discharges filtrate immediately, eliminating collection bottles and reducing cross-contamination risk.

7. Compatible with disposable Ø47mm / 100 mL filter cups for single-use convenience and cross-contamination prevention.

8. Filter heads support flame sterilization for rapid decontamination between consecutive test runs.

9. Anti-backflow protection prevents liquid reverse flow, safeguarding test result integrity.

10. Plug-in pump head structure allows quick disassembly for cleaning and accommodates various sterilization methods.

11. Compact 363 x 238 x 222 mm footprint with 5.6 kg lightweight design for flexible bench installation.

Main Parameters

Technical Parameters

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