PMFT 4000
The PMFT 4000 was specially developed for use in the quality control of masks, filter media and particulate filters. It tests particle filters for full-face masks better than the standards EN 143, ISO 16900-3 and NIOSH 42 CFR 84, with additional exact analysis of the filter mask efficiency for SARS-CoV-2 (size approx. 120 nm to 160 nm). In addition, it is possible to test face masks based on the standards EN 149/EN 13274-7 and GB 2626.
The photometric total penetration and the fractional efficiency, i.e. the efficiency over the particle size or the particle size-dependent penetration, are tested simultaneously.
Norms and certificates
National and international standards
US 42 CFR 84 GB2626 EN 143/EN 149 (referencing EN 13274-7) ISO 23328-1
Operation principle
PMFT 4000 as an all-rounder in the testing of almost all mask and filter types
The measurement of the total penetration and the penetration over the particle size is carried out simultaneously with the highly precise aerosol photometer Promo® Sense in raw and clean gas.
This allows an efficiency measurement of up to 99.9995% at higher particle concentrations in the raw gas. The measurement time is only about 30 seconds.
The size distribution of the test aerosol is as follows according to the standard:
EN 143
Oil: Media diameter ca. 160 nm | Geom. standard deviation ~ 2
Salt: Media diameter ca. 60 nm | Geom. standard deviation ~ 1.9
ISO 16900-3
Oil: Media diameter 190 nm | Geom. standard deviation 1.4 - 1.8
Salt: Media diameter 80 nm | Geom. standard deviation 1.4 - 1.8
42 CFR 84
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 the particle penetration via the particle size, the PMFT 4000 can also be used to consider the tolerances in the particle size distribution according to EN 13274-7 as min. / max. penetration value.
Overview of standards for filter testing of personal protection masks
EN 143 | EN 143 | ISO 16900-3 | ISO 16900-3 | 42 CFR 84 | 42 CFR 84 | |
|---|---|---|---|---|---|---|
Aerosol | NaCl | PaO | NaCl | PaO | NaCl | DOP |
Mean diameter | approx. 0.06 µm | approx. 0.16 µm | 0.06 – 0.1 µm | 0.16 – 0.21 µm | 0.055 – 0.095 µm | 0.165 – 0.205 µm |
Standard deviation | approx. 1.9 | approx. 2 | 1.4 – 1.8 | 1.4 – 1.8 | < 1.86 (by additional software module) | < 1.6 (by additional software module) |
Concentration | 4 –12 mg/m³ | 15 – 35 mg/m³ | 8 – 35 mg/m³ | 15 – 35 mg/m³ | < 200 mg/m³ | < 200 mg/m³ |
Discharge | required | - | required | - | required | required |
Air flow | 95 l/min | 95 l/min | to be defined | to be defined | 85 ± 4 l/min | 85 ± 4 l/min |
Temperature | 22 ± 3 °C | 24 ± 8 °C | 22 ± 3 °C | 24 ± 8 °C | 25 ± 5 °C | 25 ± 5 °C |
Rel. humidity< 40 % | < 40 % | 20 - 80 % | < 40 % | 20 – 80 % | 20 – 40 % (by compressed air) | 20 – 40 % (by compressed air) |
Measurement device | Sodium flame photometer | Light scattering photometer | Sodium flame photometer | Light scattering photometer | Light scattering photometer | Light scattering photometer |
Measuring time | 30 s | 30 s | 30 s | 30 s | lowest eff. during loading | lowest eff. during loading |
Pause time | 180 s | 180 s | 180 s | 180 s | lowest eff. during loading | lowest eff. during loading |
Exposition | 120 mg | 120 mg | 150 mg | 150 mg | 200 ± 5 mg | 200 ± 5 mg |
PMFT remarks | O.K. | O.K. | O.K. | O.K. | O.K. | O.K. |
Comparative measurements
International comparisons regarding overall penetration were successfully carried out at SGS in the USA:
Extensions/Accessories
The PMFT 4000 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 standards (exposure test) are included in the delivery and are prepared for use. A corona discharge with the CD 2000 A is integrated.
This makes it easy to use and automatically print out the measurement results, even for inexperienced users.
Benefits
Your special advantages
- Short test times of up to 30 s for overall efficiency up to 99.9995%
- Simultaneous measurement with Promo Sense including output of fractional efficiency and pressure drop
- 2 X Promo Sense aerosol spectrometer with long-life LED light source for highest measurement stability
- Delivered with two aerosol generators for NaCl and oil
- Integrated corona discharge with CD 2000 A
- Testing of fractional efficiency, e.g. efficiency in the entire size range from 145 nm to 5 µm
- Easy to use – measurement at the push of a button
- On-site calibration possible – customer calibration of particle size possible
- Individual configuration of performance at customer request
Applications
Individual solutions for various industries
- Testing of full face mask filters for use with standard filter fittings according to EN 148-1
- Measurement of total penetration of respirators
- Exact analysis of filter mask efficiency, e.g. coronavirus
- Media test for HEPA quality
Technical features
In detail
- Aerosols
- Salts (e.g. KCl, NaCl), liquid aerosols (e.g. DEHS), latex particles (PSL)
- Test area of the medium
- 100 cm2
- Measuring range (total penetration)
- 0.0005 - 100 %
- Measurement range (size)
- 0.145 – 40 µm
- Volume flow
- 1 – 27 m3/h - pressurized operation
- Power supply
- 115 – 230 V, 50/60 Hz
- Installation conditions
- +10 – +40 °C
- Differential pressure measurement
- 0 – 1,200 Pa
- Inflow velocity
- 1.5 – 70 cm/s (others on request)
- Compressed air supply
- 6 – 8 bar
- Dilution factor
- 1 : 27 / 1 : 700
- Test conditions according to standard
- +19 – +23 °C
- Dimensions
- Approx. 1,800 • 600 • 900 mm (H • W • D)
Downloads
More information about PMFT 4000
Palas Announcement: Comparative measurements of the filter media test rig PMFT with test devices of TÜV NORD
Announcement: Comparative measurements of the filter media test rig PMFT with test devices of TÜV NORD
Palas Brochure PMFT System
Shopping cart
Your individual configuration
Do you have questions about our products or services or do you need more information about a delivery status?
