Dry Microbial Penetration Resistance Tester GT-RA14

1. The test is carried out on test pieces each fixed in a container. In every container except one a portion of talc contaminated with Bacillus subtilis is poured on the test piece. One container is left uncontaminated as a control. A sedimentation plate is inserted at the base of each container at a short distance below the test piece.
2. The apparatus supporting the containers is then vibrated by a pneumatic ball vibrator. The talc that penetrates is captured on the sedimentation plate. The sedimentation plates are removed and incubated.
3. The numbers of colonies produced are counted.

Component

Equipped with one set of biosafety cabinet and one set of air compressor

a. The biosafety cabinet adopts four sides of negative pressure: that is, the left and right sides, rear and bottom walls of the whole device are all negative pressure air ducts, so that the working area and the external environment form a double-layer isolation of the air curtain and the box body, and the working area is surrounded by negative pressure to ensure that the sample does not leak.

b. Biosafety performance: personnel safety, microbial colony number of impact sampler ≤ 10 CFU / time, colony number of slit sampler ≤ 5 CFU / time

c. Airtightness of air passage: the air passage of the device is under the pressure of 500pa for 30 minutes, and the pressure drop is ≤ 10%. There is no bubble in the penetration part under the condition of soap bubble test

d. Air cleanliness class: Class 100, i.e. dust content of particles ≥ 0.5u m per il air ≤ 0.35

e. Noise: the height of the table top, 30cm from the front window and 38cm upward, under the condition that the ambient noise is 55dB, the arithmetic mean of the four directions is ≤ 58db (a)

f. Lighting: ≥ 680lux front window glass: toughened, UV resistant

g. UV intensity: ≥ 80uw / cm2

h. Differential pressure display: (30 / 2) LCD display , Ge differential pressure sensor. The number displayed on the LCD shows the pressure loss of the filter, and the error of the differential pressure sensor is ≤ 5%

i. Mechanical properties: the table top of the equipment shall be able to bear 25kg of pressure without obvious sinking, bending and other deformation

j. Electrical resistance: withstand voltage 1500V for 1 minute without breakdown

k. Liquid collecting tank: used to collect splashed liquid in the working area and equipped with drain valve.

l. Ultra high efficiency filter is suitable for filtering particles, smoke and microorganisms in the air. The filtration efficiency of imported ultra high efficiency filter (ULPA) is over 99.999% (0.3 μ m PAO method), which makes the cleanliness of working space reach 100 level.Equipped with a dual channel digital differential pressure display and electronic alarm system, it can dynamically display the pressure loss of exhaust and supply air filters, the downdraft flow rate and inflow flow rate in the operation area, as well as dual detection, When the fluctuation of downflow velocity and inflow velocity exceeds 20% of its nominal value, the audible and visual alarm will prompt the downflow velocity and fluctuation. Pre replacement and maintenance of filters and fans.

m. When the opening height of the front window of the safety cabinet exceeds the specified height of the front window operation port, the audible and visual alarm will be given and the interlocking system will be started. When the opening height falls back to the specified opening height, the alarm interlocking system will be released automatically.