Dry state/wet state microbial penetration tester test difference Dry state microbial penetration resistance tester/dry state bacteria resistance tester is used to determine the resistance of materials to bacterial penetration on dry particles within the size range of human dander , when the test is carried out, the sample is fixed on a container.
The dry resistance microbial penetration tester system is composed of an air source generation system, a detection body, a protection system, a control system, etc. Microbial penetration test method.
Features of Dry Microbial Penetration Tester:
1. Negative pressure experimental system, equipped with fan exhaust system and high-efficiency filter for inlet and outlet air, to ensure the safety of operators;
2. Special operating software, software parameter calibration, user password protection, automatic fault detection protection;
3. Industrial-grade high-brightness color touch display;
4. Large-capacity data storage, save historical experimental data;
5. U disk export historical data;
6. The cabinet has built-in high-brightness lighting;
7. Built-in leakage protection switch to protect the safety of operators;
8. The inner layer of the cabinet is made of stainless steel as a whole, and the outer layer is spray-coated cold-rolled plate, and the inner and outer layers are insulated and flame retardant.
The moisture barrier microbial penetration tester is used to determine the performance of medical surgical drapes, surgical gowns and clean clothes to resist the penetration of bacteria in liquids when subjected to mechanical friction (the barrier performance against penetration of bacteria carried by liquids when subjected to mechanical friction) .
The test principle of the moisture barrier microbial penetration tester:
1. Put the test piece on the agar petri dish, place a bacterial slice of the same size on the test piece, cover it with a piece of high-density polyethylene film with a thickness of about standard microns, and use a conical steel ring to seal the three-layer material (test The material is centered under the bacterial sheet, and the high-density polyethylene film is on top) stuck together.
2. Place the ring kit on the agar petri dish on the turntable. The test finger acts on the material in a way that it can move on the entire surface of the petri dish, so that the material is subjected to the combined effect of pressure and friction.
3. This simulates the possible stress of the barrier material and the penetration of microorganisms under wet conditions in the actual application process. The microorganisms on the bacterial sheet penetrate the test material and migrate to the surface of the agar medium. The penetration performance of the test material can be quantitatively evaluated by culturing the agar plate and counting the colonies.
The working principle of the moisture barrier microbial penetration tester:
Bacteria can penetrate shielding materials with dry organic or inorganic particles, such as bacterial-carrying dander or clean clothing, or through packaging materials during storage. The instrument can be used to determine the resistance of materials to bacterial penetration on dry particles in the size range of human dander.
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Post time: Aug-31-2022
