Product Introduction 
The particulate filtration efficiency tester operates on the aerosol photometer comparison principle. A NaCl aerosol generator produces standard particles of controlled concentration, which mix with clean air to form a test aerosol. A flow meter precisely controls the gas flow rate, directing the aerosol through the test specimen at a defined velocity. A high-precision photometer measures the aerosol concentration upstream and downstream of the specimen, and the filtration efficiency is calculated from the concentration ratio. The system includes a humidifier to simulate exhaled breath humidity and a sealed chamber to maintain a clean, stable test environment.

Key Features 
Standard NaCl Aerosol Generation Produces standard NaCl aerosol with concentration ≤200 mg/m³ and particle size 0.075±0.02 μm, strictly complying with GB 2626-2019.
High-Precision Flow Control Flow rate range of 10-100 L/min with 2% accuracy, accurately simulating filtration conditions under different human breathing intensities.
Photometer Comparative Measurement Uses a high-precision photometer to measure aerosol concentration before and after filtration, calculating filtration efficiency with accuracy and reliability.
Full Standard Compliance Designed in strict accordance with GB 2626-2019, suitable for filtration efficiency testing of KN and KP series masks and meltblown fabric.
Modular Structure Composed of a particle generator, flow measurement device, concentration measurement device, humidifier, and sealed chamber; each module has clearly defined functions for easy maintenance.
Stable Testing Environment Equipped with a sealed chamber and humidifier to ensure testing is conducted in a clean, constant-humidity environment, minimizing external interference.
Intuitive and Easy Operation Clear system tubing connections with centralized parameter setting and result display; standardized operation procedures make it easy to learn.
Wide Applicability Suitable for particulate filtration efficiency testing of various masks (KN90/KN95/KN100, etc.), meltblown fabric, filter media, and other respiratory protective devices.

Main Technical Specifications

FAQ
1. What types of masks can be tested with this equipment?
It is suitable for filtration efficiency testing of KN series (KN90, KN95, KN100) and KP series non-powered air-purifying particle respirators, as well as meltblown fabric and other filter media.

2. Why is NaCl chosen as the test medium?
NaCl aerosol is one of the standard test media specified in GB 2626-2019, used to simulate the challenge of solid particulates to respiratory protective equipment. Its particle size of 0.075±0.02 μm is close to the most penetrating particle size, effectively evaluating the filtration performance of filter materials.

3. How should the flow rate between 10-100 L/min be selected?
Flow rate selection depends on the type of product being tested and standard test requirements. Different mask types and test items correspond to different flow conditions, as specified in GB 2626-2019 or according to product testing needs.

4. Does the equipment require regular calibration?
Yes. Periodic calibration of the flow meter and photometer is recommended to ensure measurement accuracy. The aerosol generator should also be checked regularly for particle size and concentration stability. We provide calibration guidance and technical support services.

5. How are test results read and recorded?
The equipment measures upstream and downstream concentrations via a high-precision photometer, calculating and displaying filtration efficiency. For specific data display methods and data export functions, refer to the operation manual or consult our technical staff.

6. What are the environmental requirements for the equipment?
It is recommended to use in a clean, temperature- and humidity-controlled laboratory environment to avoid external dust and airflow interference. The equipment includes a sealed chamber to isolate environmental disturbances, but a clean testing environment is still recommended.

After-Sales Service
Established in 2007 and with nearly two decades of experience, Shandong Annimet Instrument Co., Ltd. is a professional manufacturer integrating R&D, production, and sales of laboratory testing and sample preparation equipment. Quality is our foundation. We are your bridge from concept to reality. We deliver more than just instruments — we deliver confidence. This Particulate Filtration Efficiency Tester comes with a 12-month warranty and lifetime technical support. Our professional team offers 24/7 service response, free installation guidance, operation training, and filtration efficiency testing method consultation. For any inquiries, please contact our customer service team; we are dedicated to providing comprehensive pre-sales, in-sales, and after-sales support. Hotline: 400-9933-057, Email: anmt_test@126.com.