The Class B B biosafety cabinets are safety cabinets connected to the exhaust system. The fan connected to the exhaust duct of the safety cabinet is connected to the emergency supply power source, and the purpose is to maintain the negative pressure of the safety cabinet under the power failure to prevent dangerous gas leakage such as laboratory. The minimum airflow velocity or average of the front window should be at least 0.5m/s (100fpm). The B1 type 70% gas is removed through the vent HEPA filter and 30% of the gas is recirculated through the supply port HEPA filter to the work area. The B2 is a 100% full-row safety cabinet with no internal circulation airflow and provides both biochemical and chemical safety controls.
The performance of each cabinet type of the second-level biosafety cabinet is designed for the level 4 biosafety level of the third-class biosafety cabinet. It is the safest cabinet with the highest safety protection level in the world. The cabinet is completely airtight, 100% fully exhausted, all gases are not involved in the cycle, the staff is operated by gloves connected to the cabinet, commonly known as glove boxes, and the test products enter and exit the safety cabinet through the double-door transfer box to ensure no pollution. Suitable for high-risk biological tests.
An A2 type secondary biosafety cabinet with an external drain pipe cover can be used under operating conditions that allow for the circulation of chemical gases. The discharge pipe cover is different from the general hard pipe in that it has an intake hole for sucking air; the discharge pipe cover is connected to the outer pipe and then connected to an external fan. The air intake on the drain pipe cover is essential for the A2 type II biosafety cabinet to maintain the balance of intake and sink airflow through the built-in fan. If a sealed external duct is used, the intake air flow will be too strong, which may cause the safety cabinet to protect the product; and the air inlet hole in the discharge duct cover can draw air from the room without affecting the airflow balance in the safety cabinet. This condition applies only to trace amounts of toxic chemicals.
Shanghai Xinzhuang Instrument Co., Ltd. is a variety of biochemical, light incubator, shaking incubator, constant temperature incubator, mold incubator, hot and cold cycle meter, shaker, oscillator, agitator, water bath, centrifuge, electric hot plate Professional manufacturing company. The company integrates research, development, production and sales of high-tech experimental instruments. Its products have eight series and more than one hundred varieties. Relying on modern science and technology, the company continuously improves product quality and launches new products, so that it is synchronized with international standards. The products are exported to all parts of the country and have won the trust of users with excellent quality and perfect service. The staff of the company always adheres to the enterprise spirit of "unity, truth-seeking and innovation", and takes "customer first, quality first, reputation first" as its tenet. We sincerely welcome new and old customers to visit us, develop together and create brilliance together!
Blood Counting Chambers are instruments for precise measuring. They are made of high quality transparent glass with no blister or flaws. They are the finest quality, optically ground, and polished milled glass chambers.
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