Mask Gas Exchange Pressure Difference Measuring Instrument

Basic Info

Model NO.	DMS
Accuracy Grade	1
Load Way	Electronic Load
Loading Method	Static Load
Display	Digital
Control	Manual Control
Weight	100-500Kg
Power Source	AC220V
Transport Package	Export Crate
Specification	1180× 650× 600MM
Trademark	DMS
Origin	Shenzhen
HS Code	9024101000
Production Capacity	1000

Product Description

The mask gas exchange pressure difference tester (gas exchange pressure difference tester) is based on the standard YY0469-2011 Technical Requirements for Surgical Masks. The test principle is to use a differential pressure sensor to achieve the pressure difference between the internal and the external of the tested mask. The test item is equipped with a special tooling device to realize the test tightness of the product. It is mainly suitable for the measurement of the gas exchange pressure difference of surgical masks/mask fabrics and can also be used to determine the gas exchange pressure difference of other textile materials.The vacuum pump is used to realize the power source of the test product; the internal and external pressure measurement of the product is realized by the tooling and fixture, and the differential pressure sensor is built-in. The integrated machine with a built-in vacuum pump and a digital display meter can test pressure and show the data automatically. The dedicated tooling fixture is also equipped for clamping and testing products;Technical parameters

Test power source	the principle of negative pressure vacuum test
Air flow rate	8L/min
Temperature range	room temperature
Sensor accuracy	0.5%
Maximum pressure regulation	20kpa
Whole machine weight	25kg
Sealing method	O-ring seal
The breathable diameter of the sample	Ф25.4mm
Differential pressure sensor range	0~500pa
Display mode	digital display pressure difference
Power supply	220V,50Hz

Mask oily (DOP) particle filtration efficiency detection systemScattering photometerPrinciple: scattering photometer, analyze and detect the concentration ratio of oil aerosol before and after the filter material, calculate the penetration rate and filtration efficiencyAccording to the new international standard EN 149, the concentration of paraffin oil and gas sol was measured by scattering photometer.I. Scope of applicationIt is used to test the filtration efficiency of daily mask, medical mask and other filter materials.Ii. Compliance with standardsRespiratory protective equipment self-priming filter respirator against particulate matterTechnical specifications for daily protective masksTechnical requirements for medical protective masksYy0469-2011 Surgical masksEN 149-2019 BSEN13274-7:2019Iii. Technical Parameters:

Particle size	the median mass concentration is 0.3 micron
Flow range	(20 ~ 100) L/min, accuracy 2%
Filtration efficiency	(0.001 ~ 99.999) %
Resistance	0 ~ 1000Pa, accuracy 2%
Test area	100cm or non-standard self-defined fixture
Aerosol	paraffin oil (optional price of high temperature and constant temperature aerosol generator is also calculated)
Aerosol concentration	(0.1 ~ 200) mg/m (oily)
Test mode	The relationship between filtering efficiency and load
Test temperature	(25±5) ºC
Relative humidity	(30±10) %
Size	23016060 (cm)
Weight	90kg
Power source	AC220V, 50Hz, 1KVA
Gas source	Flow at 550kPa: 198L/min(0.55mpa)

Iii. System composition1. Aerosol oily particulate matterAerosol generator, aerosol thinner, aerosol drying dehumidifier, particle size cutter (optional)2. Gas pathIt is composed of suction pump, PID controller of gas flow, mass flow transmitter, differential pressure transmitter and air pipe.3. Particle size spectrometer (with 6 channels, 37,000; Optional 32,000-yuan channel)Particle size spectrometer is an instrument used to measure the particle number and particle size distribution of salt aerosol and oil aerosol. Original imported light chamber from USA, original sampling air pump from Germany. The instrument according to the international general standard design (air sampling flow 2.83 liters/min), conform to the state administration of metrological JJF1190-2008 issued by the dust particle counter calibration standard procedures of technical requirement, function of the whole machine adopts microcomputer control, can at the same time to 0.3 mu m, 0.5 mu m, 0.7 mu m, 1.0 mu m, 2.0 mu m, 5.0 mu m six particle size particles distribution measurement.The particle size spectrometer is set at the front end of the filter sample to measure the particle size distribution at the front end.4. Scattering photometerBased on the principle of 90-degree Angle light scattering, aerosol particles are sucked into the optical chamber by the built-in air pump, and the mass concentration of the particles is measured by the amount of light scattering. Dynamic measurement range: below 0.01 micron; Below 1.0 micron; Below 2.5 microns; Below 4.0 microns; The mass density of ions below 10.0 micron was measured, and the detection range was 0.001-400mg /m3The mass concentration at the front end of the filter sample was measured by a photometer. The mass concentration of particles at the rear end of the filter material was measured by a photometer. The ratio of the mass concentration before and after is calculated to calculate the penetration rate and filtration efficiency of the filter material sample.5. Measurement and control systemPLC control, measurement: gas flow rate, pressure difference between front and back; Upper computer Siemens 10-inch touch screen; Siemens WINCC configuration software is used in the data acquisition system to display the curves of loading, filtration efficiency, airflow resistance and penetration rate in real time. Data can be stored permanently.According to the different standards of different countries, set and automatically calculate the change value of filtration efficiency in the loading range of 1mg, 30mg, 100mg, 200mg and 400mg.

Located in Shenzhen (Nanshan) Hi-Tech Park, Damsion Measuring and Control Equipment is an Instrument manufacturing company integrating scientific research, manufacturing and consulting services. It specializes in the development and production of test equipment that meets IEC, GB and other standards. Damsion also undertakes laboratory system integration projects for professional testing institutions and product manufacturers. With the purpose of "Building first-class testing equipment for China labs", Damsion has established an independent research and development center and introduced the most advanced technology abroad and international high-tech talents. More than 160 products in 12 series have been developed by Damsion's creative design idea: Guided by sensor data acquisition techniques, LED by computer control techniques, and centered on high-precision, low-noise transmission.Testing Equipment of:Wire and cable Material Flammability Electric toolsPlug and socket Switch life Electrical accessoriesLamp Home appliance Dustproof and waterproofImaging products IT products Battery Mask Damsion's rigorous and efficient manufacturing department provides a powerful safeguard for product output. We take every link fastidiously, including selection of materials, inspection of supplied materials, control of the production process, and check of quality testing, and operate with standardized procedures. The company's products have passed ISO9001 management system certification, ISO1400 environmental management system certification, and ISO18001 occupational health and safety system certification, expecting safer and superior products for customers. Users of Damsion in the domestic market include Entry-Exit Inspection and Quarantine Bureau, Technical Supervision Bureau, Product Quality Supervision and Inspection Institute, UL Laboratory, TUV (Rhineland), SGS (General Standard), and various electronic and electrical manufacturers. Products are exported to the international market, and agents have been set up in Hong Kong, Vietnam, Singapore, Thailand, Iran, India, Germany and other regions and countries. Service is an indispensable element to enhance the company's competitiveness. Damsion always regards improving the level and value of as direction. Before sales, we have a professional engineering team to provide customers with a full range of consulting and customized services; After sales, we also have the team to provide timely and satisfactory technical support and product maintenance. With excellent product competitiveness and perfect service, the company has successfully won the trust of many customers. Relying on technological progress, continuously improving efficiency and product quality, insistently serving the market with high-quality products, Damsion is committed to becoming a leader in the testing equipment industry.
1.
Q: Are your company a trading or factory ?
A: Factory +Trade (integration) , since 2004, we focuses on developing and manutfacturing Lab testing equipment.(testing equipment, measuring instrument, laboratory instrument, lab testing equipment, mask testing equipment) and exporting experience , OEM also acceptance for us.2.
Q: After an order is placed,when to deliver ?
A: Generally about 7-30 work days.3.
Q: Do you have any certificate about your factory ?
A: We are already got SGS , ISO 9001 and some testing machine's patent cerificate.4.
Q: What about the Warranty with after-sales service ?
A: We have one year warranty time , when the testing instrument have problems and the customer notice us.We received the customer problems feedback ,we will reply and help customer to solve the problem at first time.5.
Q: How about your testing instrument data accurate ?
A: About our testing instrument's data accuracy, customers can be assured, because many government's lab by our factory help to plan and established.