The microbial limit tester has a built-in inlet diaphragm liquid pump, which does not require an external filtration bottle. The liquid is directly discharged through the diaphragm liquid pump, reducing the complexity of using the filtration bottle and avoiding the disadvantages of slow filtration speed caused by poor connection. When injecting the test sample into the microbial limit incubator, negative pressure filtration is carried out using the built-in inlet diaphragm liquid pump of the testing instrument to trap the microorganisms in the test sample on the filter membrane. The filter membrane is then removed using a membrane extractor and transferred to a prepared solid culture medium with the bacterial surface facing up and flat. Cover the lid to form a closed culture box, place it in the corresponding constant temperature culture box for cultivation and counting.
1、 Advantages of Microbial Limit Tester
1. The pump head can be sterilized with a flame gun head, which facilitates continuous experimental operations;
2. The stainless steel casing is mirror polished, with a smooth and even surface, making it easy to clean and disinfect;
3. Built in micro diaphragm pump, low noise, no need for filter bottles, direct drainage, easy to use;
4. One host can be used with two types of pump heads, providing ample space for selection;
5. Three pump heads can be started and stopped simultaneously or controlled separately, with high work efficiency;
6. Touchscreen human-machine interface, with clear operation status and simple and intuitive operation;
7. Date and time display, convenient for operators to grasp the time;
8. The pump head is easy to disassemble and can be sterilized by 121 ℃ wet heat.
2、 Application Fields of Microbial Limit Testers
1. Food: beverages, mineral water;
2. Chemical industry: water samples for testing microorganisms;
3. Cosmetics: various water and products;
4. Pharmaceuticals: purified water, deionized water, oral preparations of active pharmaceutical ingredients, tablets, capsules, biological products;
5. Disease control: Air conditioning condensate water, samples from various rivers, lakes, and seawater.