Respirator field protection factor evaluation system and method
A technology of protection factor and evaluation system, which is applied in the direction of measuring devices, scientific instruments, suspension and porous material analysis, etc., can solve problems such as difficult to characterize the on-site protection factor of respirators, so as to avoid evaluation errors, ensure life safety, and ensure breathing Healthy effect
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[0085] Embodiment: test and evaluate respirator to the on-the-spot protection factor of PM10 sub-size particle;
[0086] Step 1: The detachable internal and external sampling system selects the detachable PM10 sampling device, and the harmful substance concentration detection system selects the MIE light scattering method dust detection subsystem;
[0087] Step 2: Complete the sampling process from S1 to S7, and use the internal and external sampling devices of the respirator mask to collect dust on the internal and external filter membranes under the same sampling time and the same sampling flow rate;
[0088] Step 3: Place the inner and outer filter membranes that have collected the dust in containers filled with a transparent sodium hexametaphosphate aqueous solution. The container has a built-in magnetic stirring bar, and the magnetic base is used to form a relatively stable and uniform dust through non-contact magnetic stirring For the suspension, in a dark room, use the ...
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