How to choose a biological safety cabinet biological safety cabinet is operating a primary culture, when bacteria strains and diagnostic specimens and other experimental infectious material, used to protect the operator himself, the lab environment and experimental materials to avoid exposed to during the above procedure may produce infectious aerosols and cleaning spills and design engineering products. Depending on the type of sample that may affect the operation of the airspace, the structural design of biological safety cabinets, exhaust proportions are different. Accordingly, the biological safety cabinet Suzhou Science and Technology in the spring by biosafety classification grade Ⅰ, Ⅱ and Ⅲ grade level, which is divided into Ⅱ grade A1, A2, B1, B2 type. According to the latest national standards emphasize basic principles of biological safety cabinet selection is "appropriate type." Different levels of security biosafety laboratory should be used at different levels, different types of biological safety cabinets, but also according to protect different types of protection to choose. Under normal circumstances, when operating a small amount of volatile chemicals or radionuclides, optional level Ⅱ B1 type of biological safety cabinet; when operating a large number of volatile chemicals or radionuclides, you must use the class type Ⅱ B2 biological safety cabinet. Currently, the most widely used is the grade Ⅱ A2 type safety cabinets, it is fully able to meet the general hospital general everyday use, energy, more economical. "Selection can not advance, will lead misalignment, misalignment will bring unbearable burden." Experts say that under the A2-type applications to meet the situation, blind selection of type B2, the question then came. B2 Safety Cabinet 100% efflux, displacement can reach 1,500 cubic meters per hour (different models are different), ordinary household fan exhaust is approximately 80 cubic meters per hour, a difference of ten times. If there is not enough room supplement wind, bio-safety cabinets simply does not work. Open lab door, do not meet the requirements of laboratory practices. In addition, a large number of indoor air efflux, to ensure that the temperature of the laboratory experiments to meet the requirements, the need refrigeration and heating loads are very large. If you can not meet the laboratory has been built indoor insulation and supplementary air volume requirements, we must invest a lot of money for reconstruction, and future operating costs are high. Manufacturers seeking product certification at the same time, consumers may also note the following: 1. When the manufacturer claims that its own production of biological safety cabinets meet an international standard, you can ask them to show proof - an independent certification body to detect legitimate signed report; 2. Some standards may not be the biological safety cabinet directly related to safety, such as biological safety cabinet manufacturer claims received ISO9001 quality certification, and ISO9001 not have safety cabinets above the performance standards of international safety cabinets detection; 3. Certification must be independent, legitimate security testing and certification bodies cabinet issued. Spring Technology Suzhou Purification Technology Co., Ltd. Sales 朱紫成 Address: Room 612, Building collar on Wujiang District, Suzhou City, Zhongshan South Road 1729