1. This instrument is suitable for the determination of the maximum pore size and average pore size of filter paper. 2. This instrument adopts the bubbling method of the test method, its principle is according to the principle of capillary action, as long as the air is measured forcibly through the pores of the measured material moistened by a liquid, so that the air is expelled from the liquid in the largest pore tube in the test piece, the pressure required when the first bubble emerges from the hole 3. The pressure required when the first bubble emerges from the gap, using the known tension of the liquid surface at the measured temperature, the maximum pore size and average pore size of the specimen can be calculated by applying the capillary equation. 【Relevant Standards】

1. QC/T794-2007 “Filter Paper for Internal Combustion Engine Industry” (Automotive Industry Standard); 2. GB/T 2679.14-1996 “Determination of Maximum Aperture Size of Filter Paper and Cardboard” 3. ISO2942 “Verification of Structural Integrity of Hydraulic Transmission Filter Element and Determination of First Bubble Point” 4. ISO4003 “Permeable Sintered Metal Materials. Determination of Pore Size in Blistering Test” 5. Comply with GB/T, ISO, AATCC and other relevant standards

【Scope of application】: 1. This instrument is suitable for the determination of the maximum pore size and average pore size of filter paper. 2. This instrument adopts the bubbling method of the test method, the principle is according to the principle of capillary action, as long as the air is measured through the pores of the measured material wetted by a liquid, so that the air is expelled from the liquid in the largest pore tube in the test piece, the pressure required when the first bubble emerges from the hole, using the known tension of the liquid surface at the measured temperature, the maximum pore size and average pore size of the test piece can be calculated by applying the capillary equation. [Meet the standard]: 1. QC/T794-2007 “Internal Combustion Engine Industrial Filter Paper” (Automotive Industry Standard); 2. GB/T 2679.14-1996 “Determination of the maximum pore size of filter paper and cardboard” 3.ISO2942 “Verification of Structural Integrity of Hydraulic Transmission Filter Element and Determination of the First Bubble Point” 4.ISO4003 “Permeable Sintered Metal Materials. Determination of Pore Size in Blistering Test” 5. Comply with GB/T, ISO, AATCC and other relevant standards [Instrument features]:   This instrument has the advantages of small size, light weight and easy movement. The instrument adopts advanced electronic technology, the parameters can be pre-set, the large LCD screen displays the pressure value and automatically calculates and displays the aperture value, and each step of the operation interface has text prompts, which is simple to operate. The aperture value of each specimen and the average value of a group of specimens are printed out by the printer, and each group of specimens does not exceed 10. 【Technical Parameters】: 1. Air pressure: 0-20kpa 2. Test range: 4.494-179.76um 3. Pressurization speed: 2-2.5kpa/min 4. LCD screen display: 240128 dot matrix 5. Pressure value accuracy: ±1% 6. Pressure resolution: 0.01kPa 7. Pore size resolution: 0.01μm 8. Specimen thickness: 0.10-3.5mm 9. Test area: 10±0.2cm² 10. Inner diameter of the clip ring: Φ35.7±0.5mm 11. Gas storage cylinder volume: 2.5L 12. Instrument size: 275×440×315mm 13. Power supply: 220V 50Hz