Masks are the most widely used protective articles in daily work. The dust blocking efficiency of masks is determined by their blocking efficiency for fine dust, especially respiratory dust below 2.5 microns.  Because dust of this particle size can directly enter alveoli, which has great impact on human health.  The principle of dust resistance is mechanical filtration, that is, when dust collides with the filter material, it will block some dust in the filter material through layer upon layer to filter air.  For a good protective mask, the following three conditions should be met: first, the filtering efficiency is high under the condition that the mask and the user's face are in good fit; second, the breathing resistance is small; and third, the user feels comfortable.

 

    FFZ372 respiratory resistance tester

 

    Purpose: To measure the inspiratory resistance and expiratory resistance of respirators and masks under specified conditions.  It is used by the national labor protection articles inspection organization and mask manufacturers to carry out quality inspection on ordinary masks, dust masks, medical masks and anti-smog mask products.

 

    Compliance with standards: GB2626-2006, GB/T32610-2016, etc.

 

    Instrument characteristics:

    1. The casing of the whole machine is made of imported special aluminum, which makes the whole machine more metallic and never rusts.

    2. Imported flowmeter is adopted to stably control airflow.

    3. The standard die can be quickly replaced to facilitate testing of various samples.

    4. Color touch screen display, beautiful and generous.  The menu mode of operation is as convenient as a smart phone.

    5. The core control components are Italy's 32 - bit multi-functional motherboard.

    6. The test time can be adjusted according to the test requirements.

    7. The end of the test is provided with an end sound prompt.

    8. Equipped with special sample clamping device, it is simple and convenient to use.

 

    Technical parameters:

    1. The measuring range of flowmeter is 0 L / min ~ 100 L / min, and the accuracy is±2%

    2. The micro-pressure measuring range is - 1000 Pa to 1000 Pa, and the precision is 1Pa.

    3, The suction pump suction quantity is not less than 100L/min

    4. The ventilation volume is constant at （85±1）L/min

    5. Display Mode: Touch Screen Display

    6. Test time can be adjusted arbitrarily.

    7. After the completion of the test, automatically record the test data

    8. Overall dimensions: length 56cm, width 36cm, height 62cm

    9. Power Supply: AC220V±10%，50Hz，0.6KW