Dry Microbial Penetration Resistance Tester | ISO 22612 / YY/T 0506.5

The Dry Microbial Penetration Resistance Tester is designed to evaluate the resistance of materials to bacterial penetration carried by dry particles in the size range of human dandruff. It is widely used for testing medical protective equipment, including surgical gowns, drapes, and clean air suits. The instrument plays a critical role in ensuring compliance with EN 13795 and EN 14126, supporting CE marking under the European Union Medical Device Directive 93/42/EEC.

This tester provides precise, reproducible results for evaluating the protective performance of materials against microbial contamination from dry particulates.

Applications

The tester is applicable for:

Medical protective textiles including surgical gowns, drapes, and clean air suits

Material performance evaluation in medical device manufacturing

Quality control in production departments

R&D testing for new protective materials

Compliance testing for third-party laboratories and regulatory agencies

Standards Compliant

ISO 22612 — Determination of resistance of materials used in protective clothing to penetration by dry microbial particles

YY/T 0506.5-2009 — Medical protective clothing – Test method for dry microbial penetration resistanceCompliance with EN 13795 and EN 14126 ensures conformity with European medical device regulations and CE marking requirements.

Test Principle

Samples are fixed individually on stainless steel test containers. Five containers carry Bacillus subtilis, while one container with uncontaminated talc serves as a control. Petri dishes are placed beneath each container to collect any particles passing through the material.

The supporting container platform is oscillated using a gas ball type vibrator. All talcum powder passing through the sample is collected on the Petri dish, which is then cultured. The microbial penetration resistance is evaluated by counting the colonies formed.

Main Features

Pneumatic Ball Vibrator — Provides uniform oscillation of test containers

High-Frequency Vibration — 20,800 times per minute with a force of 650 N

Six Workstations — Allows simultaneous testing of multiple samples

Negative Pressure Cabinet — Adjustable from -50 Pa to -200 Pa with ≥99.99% filtration efficiency

High Data Capacity — Stores up to 100,000 test groups

Durable Construction — Stainless steel containers, marble workbench, and robust oscillation system ensure long-term reliability

Technical Parameters

Parameter	Specification
Vibration Type	Pneumatic ball vibrator
Vibration Frequency	20,800 times/min
Vibration Force	650 N
Worktable Size	40 cm × 40 cm × 10 mm
Workbench Material	Marble plate
Experimental Container	Stainless steel test container
Number of Workstations	6
Negative Pressure Range	-50 Pa to -200 Pa
Filter Efficiency	≥ 99.99%
Cabinet Ventilation Flow	≥ 5 m³/min
Data Storage Capacity	100,000 groups
Power Supply	AC 220V, 50 Hz

FAQ

1. What is a Dry Microbial Penetration Resistance Tester?

It is an instrument used to evaluate how effectively protective textiles resist bacterial penetration carried by dry particles.

2. Why is this test important?

It ensures surgical gowns, drapes, and cleanroom garments provide adequate microbial protection, helping manufacturers meet EN 13795, EN 14126, and EU CE requirements.

3. What materials can be tested?

Medical nonwovens, surgical gowns, drapes, clean air suits, and other protective textiles.

4. How does the test work?

Samples are fixed on containers carrying Bacillus subtilis in talc powder. The containers are oscillated, and particles passing through the sample are collected on Petri dishes for colony counting.

5. How many samples can be tested simultaneously?

The instrument features six workstations, allowing up to six samples to be tested at the same time.

2025-12-08 17:46