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口罩過濾效率測試機台 PMFT 1000

Test of respiratory masks better than the standard. Exact analysis of filter mask efficiency from 100 nm up to 40 µm. SARS-CoV-2 size approx. 120 nm - 160 nm.

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The PMFT 1000 tests respirators better than the standard with additional accurate analysis of filter mask efficiency for SARS-CoV-2 (size approximately 120 nm to 160 nm). 8 size channels for 100 nm and 180 nm efficiency.

The PMFT 1000 is equipped with aerosol generators for measuring penetration with oil and salt. Measurement procedures for quick quality control (short test) or for testing according to standard (exposure test) are supplied.

Operation and automatic printout of the measurement results are therefore easy even for inexperienced users.

The measurement of total penetration and penetration via particle size is carried out with the high-precision Promo 1000 aerosol photometer.

The size distribution of the test aerosol according to the standard is as follows:

EN 149:

Oil: Media diameter 290 nm | Geom. standard deviation 1.85
Salt: Media diameter 70 nm | Geom. standard deviation 2.5

42 CFR 84 / GB 2626:

Oil: Media diameter 200 nm | Geom. standard deviation 1.6
Salt: Media diameter 55 nm | Geom. standard deviation 1.86

Based on the measurement of particle penetration via particle size, the PMFT can also be used to view the tolerances in the particle size distribution according to En 13274-7 as min./max. penetration values. In addition, comparative values to other manufacturers are possible (option).


The comparison with other standards (42CFR84/NIOSH) is also easy with the 42CFR84 upgrade KIT.

 

Overview of standards for face mask penetration testing

 
EN 149
EN 13274-7
EN 13274-7
GB 2626
GB 2626
42 CFR 84
42 CFR 84
Aerosol
see EN 13274-7
NaCl
PaO
NaCl
PaO/DOP
NaCl
DOP
Mean diameter
see EN 13274-7
0.06 – 0.1 µm
0.29 – 0.45 µm
0.055 – 0.095 µm
0.165 – 0.205 µm
0.055 – 0.095 µm
0.165 – 0.205 µm
Standard deviation
see EN 13274-7
2 – 3
1.6 – 2.2
< 1.86 (by additional software module)
< 1.6 (by additional software module)
< 1.86 (by additional software module)
< 1.6 (by additional software module)
Concentration
see EN 13274-7
4 –12 mg/m³
15 – 25 mg/m³
< 200 mg/m³
(50 mg/m³) < 200 mg/m³
< 200 mg/m³
< 200 mg/m³
Discharge
-
-
-
required
required
required
required
Air flow
see EN 13274-7
95 l/min
95 l/min
85 ± 4 l/min
85 ± 4 l/min
85 ± 4 l/min
85 ± 4.25 l/min
Temperature
see EN 13274-7
22  ± 3 °C
-
25 ± 5 °C
25 ± 5 °C
25 ± 5 °C
25 ± 5 °C
Rel. humidity
see EN 13274-7
< 40 %
-

20 – 40 %

(by compressed air)

-

20 – 40 %

(by compressed air)

20 – 40 %

(by compressed air)

 
 
 
 
 
 
 
 
Measurement device
see EN 13274-7

Sodium flame photometer

Light scattering photometer

particle detector

particle detector

Light scattering photometer

Light scattering photometer

 
 
 
 
 
 
 
 
Measuring time
see EN 13274-7
30 s
30 s

lowest eff. during loading

lowest eff. during loading

lowest eff. during loading

lowest eff. during loading

Pause time
see EN 13274-7
180 s
180 s

lowest eff. during loading

lowest eff. during loading

lowest eff. during loading

lowest eff. during loading

 
 
 
 
 
 
 
 
Exposition
120 mg
120 mg
120 mg

200 ± 5 mg

200 ± 5 mg

200 ± 5 mg

200 ± 5 mg

 
 
 
 
 
 
 
 
PMFT remarks

O.K.

O.K.

O.K.

O.K. with upgrade KIT

O.K. with upgrade KIT

O.K. with upgrade KIT

O.K. with upgrade KIT

 

 

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