The difference between biological safety cabinets and fume hoods and ultra-clean workbench
Biosafety cabinets, fume hoods, and clean benches are common operating equipment in food laboratories. Although they seem to have similar structures and appearances on the surface, in fact these are three different types of equipment, so in the laboratory In the construction, it is necessary to clearly understand the distinction between biological safety cabinets, fume hoods and ultra-clean work platforms. First of all, we must make clear that the fume hood and the ultra-clean workbench are not part of the biosafety cabinet and should not be used in experiments or production processes involving infectious pathogenic microorganism materials. Biological safety cabinets (BSCs) are used to protect workers, laboratory environments, and laboratory products from the above operations when they are used to infect experimental strains such as bacterial strains and diagnostic specimens. Designed for infective aerosols and spills that may occur during the process. The Laboratory Biosafety Manual published by the World Health Organization (WHO) clearly states: “Biosafety cabinets can effectively reduce laboratory infections due to aerosol exposure and cross-contamination of cultures. Biosafety cabinets also protect work. surroundings". Of course, the prerequisite for the safe working of the safety cabinet is to purchase qualified safety cabinets and use safety cabinets correctly. The current effective national standard "General Rules for Food Microbiology (GB 4789.1-2010)" stipulates that the isolation and identification of pathogenic microorganisms should be carried out in the secondary biosafety laboratory (BSL-2), and the general requirements for laboratory biosafety (GB) 19489-2008) also made clear requirements for biosafety cabinets in the definition of secondary biosafety laboratories. Therefore, biosafety cabinets have become one of the necessary equipment for the inspection of food pathogenic microorganisms. Fume hoods (ventilation cabinets) are designed to remove corrosive chemical gases and toxic fumes during chemical experiments. The fume hood does not effectively remove microbial media because it is not equipped with a HEPA filter. Microbiological samples placed in the fume hood will spread out of the cabinet and contaminate the laboratory environment. The ultra-clean workbench (clean bench) is designed to protect the test piece or product. It prevents the test article or product from being contaminated by dust or bacteria outside the work area by blowing vertical or horizontal laminar air through the work area. Once the infectious pathogenic microbial sample is placed in the work area, laminar air will create a hazard by blowing air with such microbial media to the front desk staff. Therefore, it is suitable for inoculation and isolation of non-pathogenic microorganisms. The biosafety cabinet is designed to protect workers, laboratory environments, and laboratory materials from the use of infectious materials such as primary cultures, bacterial strains, and diagnostic specimens to avoid exposure to the above operations. Designed for the production of infectious aerosols and spills. Its purpose is to protect the experimental process, operators and the environment from harm. Fume hoods and clean benches are not biosafety cabinets and should not be used in experiments or production processes involving microbial materials. The choice of biosafety cabinet depends most on the type of test substance used in the biological test: 1. If the biological test involves microbial samples and trace chemical reagents (non-corrosive), it is necessary to use a safety cabinet equipped with an external piping. . Because HEPA filters are not effective in filtering and removing chemical gases, if they are not efflux, they will pose a threat to workers and the environment in the laboratory. 2. If biological tests involve cytotoxic drugs, such as various cancer treatments, Use a cytotoxic safety cabinet. 3. If the biological test involves only microbial samples, a basic type of biosafety cabinet can be used;
In addition, a clear understanding of the distinction between biosafety cabinets and fume hoods/clean benches is required. Fume hoods and clean benches are not biosafety cabinets and should not be used in experiments or production processes involving microbial materials. The ultra-clean workbench (clean bench) is designed to protect the test piece or product. It prevents the test article or product from being contaminated by dust or bacteria outside the work area by blowing vertical or horizontal laminar air through the work area. Once the microbial sample is placed in the work area, laminar air will create a hazard by blowing air with microbial media to the front desk staff. Fume hoods (ventilation cabinets) are designed to remove corrosive chemical gases and toxic fumes during chemical experiments. The fume hood does not effectively remove microbial media because it is not equipped with a HEPA filter. Microbiological samples placed in the fume hood will spread out of the cabinet and contaminate the laboratory environment.
SW-CJ-2FD double single-sided (medical) vertical air purification workbench technical parameters:
This is a purification workbench widely used in medical and health, pharmaceutical, chemical experiments, etc., and provides a sterile, dust-free and clean environment.
Characteristics
1, vertical flow
2, using adjustable air volume fan system, light touch switch and stepless adjustment voltage. Ensure that the wind speed in the work area is always ideal.
Technical Parameters
model
SW-CJ-2FD
Cleanliness
Level 100 @≥0.5μm (US Federal 209E)
Number of colonies
<0.5 pcs/dish. (diameter 90mm culture plate)
noise
≤62dB(A)
average wind speed
0.25m-0.45/m/s (adjustable)
Vibration half-peak
≤0.5μm (X·Y·Z)
Illuminance
≥300LX
power supply
AC, single phase 220V/50HZ (200W)
Maximum power consumption
800W
weight
200KG
Working size
1360*600*520mm
Dimensions
1540*680*1600mm
High efficiency filter specifications and quantities
1355*555*38*1
Fluorescent / UV lamp specifications and quantities
16W*1/15W*1
BSC series biological safety cabinet technical parameters
Bio-cleaning cabinets are a necessity for today's microbiology laboratories, especially where operators need to take protective measures. For example, medical, pharmaceutical, scientific research, etc. provide a sterile, dust-free and work-safe environment for bacterial culture.
Features:
1 Air curtain type isolation design to prevent internal and external cross-contamination, airflow 70% efflux 30% internal circulation, negative pressure vertical laminar flow.
2 Move the glass door up and down, it can be positioned freely, easy to operate, and can be completely closed for sterilization, positioning height limit alarm prompt.
3 Work area power outlet, equipped with waterproof socket and drain interface for the operator
4 There is a special filter at the exhaust to control the pollution.
5 Working environment is made of high quality 304 stainless steel. It is smooth, seamless and has no dead angle. It can be easily and thoroughly disinfected to prevent corrosion of corrosives and disinfectants.
6 Controlled by LED LCD panel.
7 Equipped with high efficiency filter failure alarm function.
8 Work area airflow diarrhea alarm.
9.10 ° tilt angle, in line with the human body design concept.
model
BSC-1000IIA2
Biological clean safety cabinet
BSC-1300IIA2
Biological clean safety cabinet
BSC-1600IIA2
Biological clean safety cabinet
Work area size (width × depth × height)
1000×650×580
1300×650×580
1600×650×580
Device dimensions (width × depth × height)
1200×750×1950
1500×750×1950
1800×750×1950
Purification efficiency
Level 100 (US Federal Standard 209E)
weight
150kg
200kg
250kg
average wind speed
Inside of the door: 0.38±0.025m/s inner side: 0.27±0.025m/s middle: 0.26±0.025m/s
Front suction wind speed
0.35±0.025m/s
Power consumption
0.8KW
Average number of colonies
≤0.5 dishes·hour
noise
≤62dB
Vibration half-peak
≤3μm (X·Y·Z)
power supply
220V50Hz
Filter size (length × width × height) mm
955×545×50
1295×545×50
1595×545×50
Lighting / germicidal lamp
20W×1/20W×1
30W×2/30W×1
30W×2/30W×2
Wind direction
Jacking/out
FEATURE:
- Cookie Press Icing Set
- Better idea for kids
- Easy to clean
- Safety food grade stainless steel material
How to use:
Wash your hand and it dry. when the dough is ready,you can use Cookie Cutter to cut biscuits out,you can make any pattern you want easily by using cookie cutter ,then you can put them on tray and into oven.
Stainless Cookie Cutters,6 Inch Round Cake Cutter,Stainless Sandwich Cutters,Stainless Steel Biscuit Cutter
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