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Microorganism penetration testing machines are specialized instruments designed to evaluate the barrier performance of protective materials—such as surgical gowns, drapes, and clean air suits—against bacteria and other infectious agents. These machines operate under two primary standards: Dry Microbial Penetration (ISO 22612) and Wet Microbial Penetration (ISO 22610/EN 14126), simulating different real-world infection risks.
1. Dry Microbial Penetration Resistance Tester (ISO 22612)
This machine evaluates a material's resistance to bacteria-carrying dry particles (simulating dust or skin flakes) through high-frequency vibration.
- Key Principle: A sample is secured in a container, loaded with talcum powder contaminated with Bacillus subtilis, and vibrated at high speed (e.g., 20,800 cycles/min). Particles that penetrate the material are collected on a Petri dish underneath.
- Components: Pneumatic ball shaker (vibration system), stainless steel test containers, and often a negative pressure safety cabinet (e.g., -50 Pa to -200 Pa).
- Key Specifications (e.g., GT-RA14, ZR-1070):
- Vibration Frequency: 20,800 ± 200 times/min.
- Vibration Force: 650 N.
- Work Stations: Typically 6 test positions.
2. Wet Microbial Penetration Tester (ISO 22610 / EN 14126)
This machine measures a material's resistance to penetration by infective agents when subjected to mechanical contact with contaminated liquids.
- Key Principle: The specimen is placed over an agar plate. A contaminating liquid containing bacteria is placed on top of the specimen, covered with a polyethylene film, and a "test finger" applies pressure and rotation (simulating friction).
- Components: Rotary table (typically 60±1 rpm), rotating test finger, stainless steel rings.
- Key Specifications (e.g., GT-RA15, MP18):
- Test Finger Pressure: Adjustable (typically 3 ± 0.02 N).
- Rotation Speed: 60 ± 1 RPM.
- Test Finger Movement: Reciprocating rotation from the center to the periphery of the AGAR plate.
Summary of Applications
- Medical Protective Equipment: Assessing surgical gowns, drapes, and masks.
- Cleanroom Garments: Ensuring cleanliness standards.
- Material Development: Developing new barrier fabrics.
- Compliance: Meeting EN 13795 (EU) and other international standards.
Leading manufacturers of these testers include Gester Instruments (GT-RA series), Junray (ZR-1070), and Drick Instruments (DRK-1071).
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Wet-resistant Bacterial Penetration Tester
Torontech
https://www.torontech.com › wet-resistant-bacterial-pen...
Torontech
https://www.torontech.com › wet-resistant-bacterial-pen...
This simulation replicates real-world conditions where barrier materials face microbial penetration under wet environments. During testing, microbes from the ...Read more
Wet-resistant Bacterial Penetration Tester GT-RA15
gester international co.,ltd
https://www.gester-instruments.com › wet-resistant-bacter...
gester international co.,ltd
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Wet Bacterial Penetration tester used to measure the penetration performance of bacteria in the liquid when the material is subjected to mechanical friction.Read more
Dry microbial penetration resistance tester，ISO 22612
标准集团香港有限公司
https://www.standard-groups.com › News
标准集团香港有限公司
https://www.standard-groups.com › News
Jan 19, 2026 — Dry microbial penetration resistance testing is a method used to evaluate a material's ability to resist the penetration of microorganisms ...Read more
CE Best Microorganism Penetration Teste Products ...
UTS International Co., Ltd
https://www.utstesters.com › microorganism-penetration...
UTS International Co., Ltd
https://www.utstesters.com › microorganism-penetration...
Wet-Resistant Microorganism Penetration Resistance Tester is used to test material (used for protective clothing) resistance to penetration by infective agents ...Read more
Dry Microbial Penetration Resistance Tester | Gester Instruments
gesterinstruments.com
https://www.gesterinstruments.com › dry-microbial-pen...
gesterinstruments.com
https://www.gesterinstruments.com › dry-microbial-pen...
Dry Microbial Penetration Resistance Tester ; Glove Tester · Cutting Tester · TDM Cutting Resistance Tester ; Protective Clothing Tester · TPP Thermal Protection ...Read more
Wet-resistant Microorganism Penetration Tester
Drick Instruments
https://www.drickinstruments.com › products › wet-resi...
Drick Instruments
https://www.drickinstruments.com › products › wet-resi...
Wet-resistant Microorganism Penetration Tester Manufacturers, Factory, Suppliers From China, For more info, be sure to call us as shortly as possible!
EN ISO 22610 Wet Microbial Penetration Resistance ...
Alibaba.com
https://www.alibaba.com › ... › Testing Equipment
Alibaba.com
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EN ISO 22610 Wet Microbial Penetration Resistance Tester for Medical Clean Suits Moisture-resistant Microbial Penetration Tester. Main application.Read more
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