2. Related standards:

YY0469-2011 "mask", YY0969-2013 "disposable mask".

3. Instrument features:

1. The suction air source is used as the power source of the instrument, which is not restricted by the space of the test site;

2. Equipped with a precision differential pressure sensor, which digitally displays the differential pressure on both sides of the sample;

3. The special sample holder ensures that the sample is firmly clamped.

4. Technical parameters:

1. Air source: suction type;

2. Air flow: 8L/min;

3. Sealing method: O-ring seal;

4. The breathable diameter of the sample: Ф25mm;

5. Range of differential pressure sensor: 0～500pa;

6. Display mode: digital display pressure difference;

7. Power supply: 220V, 50Hz