Test items: filtration efficiency and airflow resistance of composite materials DRK506F particle filtration efficiency (PFE) tester (dual photometer sensor) is used to quickly, accurately and stably detect the filtration efficiency of various masks, respirators, and flat materials, such as glass fiber, PTFE, PET, and PP melt-blown composite materials And airflow resistance. Comply with standards: EN 149-2001 and other standards. Features: 1. Using high-precision imported brand differential pressure transmitter to ensure the accuracy and stability of the air resistance differential pressure of the tested sample. 2. The well-known brand high-precision dual photometer sensor is used to monitor the upstream and downstream particle concentration mg/m3 at the same time to ensure accurate, stable, fast and effective sampling. 3. The test air is equipped with a clean device to ensure that the test air is clean and the exhaust air is clean, and there is no pollution to the test environment. 4. Use frequency conversion to control the speed of mainstream fan to automatically control the test flow and stabilize within ±0.5L/min of the set flow. 5. Adopting Collision multi-nozzle design to ensure rapid and stable adjustment of fog density. The dust particle size meets the following requirements: 5.1. Salinity: The concentration of NaCl particles is 1mg/m3～25mg/m3, the median diameter is (0.075±0.020) μm, and the geometric standard deviation of particle size distribution is ≤1.86. 5.2. Oiliness: The concentration of oily particles is 10～200mg/m3, the median diameter of counting is (0.185±0.020) μm, and the geometric standard deviation of particle size distribution is ≤1.6. 6. Equipped with a 10-inch touch screen and Omron PLC controller. The test result is displayed or printed directly. Test results include: test report and loading report. 7. The whole machine is easy to operate. Just place the sample between the clamps, and press the two start keys of the anti-pinch device with both hands at the same time to work automatically. There is no need to do a blank test. 8. The noise of the whole machine is less than 65dB when working. 9. Built-in automatic particle concentration calibration program, only need to input the actual test load weight into the instrument, and the instrument will automatically complete the automatic calibration according to the set load. 10. The instrument has a built-in sensor auto-purification function. After the test, the instrument automatically enters the sensor and automatically cleans it to ensure the zero point consistency of the sensor. 11. Equipped with KF94 fast loading test function. Technical Parameter: 1. Sensor configuration: dual photometer (domestic/imported TSI brand optional) 2. Number of fixture stations: double station 3. Aerosol generator: salty and oily 4. Test mode: fast and loading 5. Test flow range: 10L/min～100L/min, accuracy 2% 6. Filter efficiency test range: 0～99.999%, resolution 0.001% 7. The cross-sectional area through which the air flow passes: 100 cm2 8. Resistance test range: 0～1000Pa, accuracy can reach 0.1Pa 9. Electrostatic neutralizer: Equipped with electrostatic neutralizer, which can neutralize the charged particles. 10. Power supply and power: AC220V, 50Hz, 1KW Note: Due to technological progress, the information will be changed without notice. The product is subject to the actual product in the later period.