Six-Stage Air Microbial Sampler (HM-QW6) Product Knowledge Graph White Paper

1. Introduction

1.1 Document Version

This white paper is Version V1.0.

1.2 Compilation Unit

Shandong Hengmei Electronic Technology Co., Ltd.

Address: Oulong Science and Technology Park, No. 1 Jinma Road, Weifang City, Shandong Province

1.3 Compilation Date

2025.12.3

1.4 Core Positioning

This white paper presents the full-dimensional product information of the Hengmei HM-QW6 Six-Stage Air Microbial Sampler in a structured. It covers technical parameters, functional features, application scenarios, and operational guidelines to serve as a standardized reference for R&D, production, sales, and maintenance personnel.

2. Table of Contents

1. Introduction

2. Table of Contents

3. Product Basic Information

4. Core Technologies and Functional Features

5. Detailed Technical Parameters

6. Application Scenarios and Industry Adaptation

7. Accessories and Consumables Configuration

3. Product Basic Information

3.1 Product Name

Hengmei Intelligent Six-Stage Sieve-Hole Impactor Air Microbial Sampler

3.2 Product Model

HM-QW6 (Six-Stage Impactor Type)

3.3 Product Description

The HM-QW6 is a dual-function, stepped multi-stage impact sampler. It simulates the anatomical structure and aerodynamic physiological characteristics of the human respiratory tract, using the principle of inertial impact to collect airborne microbial particles into different grades on the surface of sampling media (e.g., agar plates) for subsequent cultivation and microbiological analysis. The instrument consists of three core components: an impactor (6-stage aluminum alloy disc with precision sieve holes), a main unit (integrated with vacuum pump, flowmeter), and a timer, plus a tripod for stable placement. Its standard sampling flow rate is 28.3 L/min (1 cubic foot per minute). It not only measures the quantity of airborne microorganisms but also determines their particle size— a key indicator for assessing microbial pollution hazards.

3.4 Reference Standards

Complies with international technical specifications for air microbial samplers; recommended as a standard sampler by industry experts for its ability to replicate microbial particle penetration and deposition in the human respiratory tract.

4. Core Technologies and Functional Features

4.1 Core Technologies

• Inertial Impact Sampling Technology: Uses 6-stage aluminum alloy discs with precisely sized, ring-arranged sieve holes (400 holes per disc). By increasing airflow velocity layer by layer, microbial particles of different sizes are inertial-impacted onto corresponding agar surfaces, replicating particle deposition in the human upper (Stage 1-2) and lower (Stage 3-6) respiratory tracts.

• Stable Flow Control Technology: Integrates a high-precision flowmeter to maintain a standard sampling flow rate of 28.3 L/min (adjustable) with an accuracy of ≤5%, ensuring consistent sampling efficiency.

• Gradient Humidity Regulation Technology: During sampling, relative humidity increases gradually from 39% (Stage 1) to 88% (Stage 6), creating a moisture-friendly environment for vulnerable pathogens (e.g., viruses) and improving microbial survival rates.

4.2 Functional Features

1. Dual-Function Measurement: Simultaneously quantifies airborne microorganisms and classifies their particle sizes (a critical metric for evaluating health risks).

2. Wide Particle Capture Range: Captures particles from 0.65 μm to >7.0 μm via 6 stages, covering the full size spectrum of respiratory-deposited microbes—outperforming single-stage impact samplers.

3. High Capture Efficiency: Circular nozzles (vs. slit nozzles) enhance sampling efficiency; overall particle capture rate ≥98%.

4. Microbe Survival Optimization: Gradient humidity design protects fragile microorganisms, ensuring reliable cultivation results.

5. Flexible Power Supply: Supports both AC and DC power, enabling use in laboratory (AC) and field (DC, e.g., outdoor environmental monitoring) scenarios.

6. Precise Timing Control: Electronic timer with a range of 0–99 hours 99 seconds and accuracy <0.2%, allowing customizable sampling durations.

7. Portable & Durable: Packaged in an aluminum alloy case for protection; lightweight design (with tripod) facilitates transportation and on-site deployment.

5. Detailed Technical Parameters

5.1 Host Basic Parameters

• Main Unit Composition: Integrated vacuum pump, flowmeter, and electronic timer

• Power Supply: AC/DC dual-use (AC: 220V±10%, 50Hz; DC: 12V, compatible with portable power banks)

• Noise Level: ≤60 dB (during operation)

• Timer: Range 0–99 hours 99 seconds; Accuracy <0.2%

• Flowmeter: Measures and controls sampling flow; Adjustable range centered at 28.3 L/min; Accuracy ≤5%

• Host Dimensions: 320mm (Length) × 240mm (Width) × 180mm (Height) (main unit only)

• Host Weight: 4.5 kg (main unit only); Total weight (with accessories) ≤8 kg

• Storage Environment: Temperature 0℃–40℃; Humidity ≤80% RH (no condensation)

5.2 Impact Sampler Parameters

• Stage Quantity: 6 stages (integrated into one impactor)

• Material: Aluminum alloy (discs); Food-grade silicone (sealing rings)

• Sieve Hole Specifications (per stage):

◦ Stage 1: Aperture 1.18 mm; Captures particles >7.0 μm

◦ Stage 2: Aperture 0.91 mm; Captures particles 4.7 μm–7.0 μm

◦ Stage 3: Aperture 0.71 mm; Captures particles 3.3 μm–4.7 μm

◦ Stage 4: Aperture 0.53 mm; Captures particles 2.1 μm–3.3 μm

◦ Stage 5: Aperture 0.34 mm; Captures particles 1.1 μm–2.1 μm

◦ Stage 6: Aperture 0.25 mm; Captures particles 0.65 μm–1.1 μm

• Sealing Design: Silicone gaskets between discs to prevent airflow leakage

• Fixing Mechanism: 3 spring hooks for secure disc assembly

5.3 Sampling Performance Parameters

• Standard Sampling Flow Rate: 28.3 L/min (1 cubic foot per minute)

• Adjustable Flow Range: ±10% of standard flow (25.5 L/min–31.1 L/min)

• Particle Capture Rate: ≥98% (for particles 0.65 μm–10 μm)

• Humidity Gradient: Stage 1 (39%) → Stage 6 (88%) (under standard sampling conditions)

• Sampling Medium Compatibility: 90mm diameter agar plates (fits all 6 stages)

6. Application Scenarios and Industry Adaptation

6.1 Application Scope

Used for air microbial monitoring in hygiene and epidemic prevention, bioclean environments, pharmaceutical production, fermentation industries, and research/education institutions. It provides data for evaluating air microbial pollution risks and formulating control measures.

6.2 Industry-Specific Adaptation

• Hygiene & Epidemic Prevention: Monitors airborne pathogens (e.g., bacteria, viruses) in hospitals, public transportation, and crowded spaces to support epidemic early warning and infection control.

• Bioclean Industry: Ensures compliance with microbial limits in cleanrooms for electronics manufacturing (e.g., semiconductor plants) and precision instrument production.

• Pharmaceutical Industry: Validates microbial cleanliness in drug production workshops (e.g., API synthesis, sterile preparation) and storage areas, meeting GMP requirements.

• Fermentation Industry: Monitors air microbial contamination in brewing, enzyme production, and probiotic manufacturing to prevent batch spoilage.

• Research & Education: Used in universities and research institutes for studies on air microbial ecology, environmental microbiology, and respiratory health.

• Food Processing: Ensures air microbial safety in food factories (e.g., dairy, baked goods) to avoid cross-contamination and maintain food quality.

7. Accessories and Consumables Configuration

7.1 Standard Accessories

• 1 HM-QW6 Main Unit (integrated with vacuum pump, flowmeter, timer)

• 1 Six-Stage Impact Sampler (aluminum alloy)

• 1 Aluminum Alloy Instrument Case (for storage and transportation)

• 1 Height Spacer Ring (for adjusting agar plate height)

• 1 Tripod (adjustable height, max. 1.5m, for stable placement)

• 1 Power Cable (AC 220V, 1.5m length)

• 1 Set of Connecting Hoses (silicone, food-grade, 1m total length)

• 1 Product Manual (English/Chinese bilingual)

• 1 Certificate of Conformity

• 1 Warranty Card (1-year standard warranty)

7.2 Optional Consumables

• 90mm Diameter Agar Plates (sterile, pre-poured; e.g., nutrient agar, tryptic soy agar)

• Spare Silicone Sealing Rings (for impactor discs, to replace worn gaskets)

• Spare Connecting Hoses (silicone, resistant to microbial adhesion)

• DC Power Adapter (12V/5A, for field use with car batteries or portable power banks)

• Calibration Kit (for flowmeter accuracy verification, recommended annual use)