Frazier Differential Pressure Air Permeability Tester

For testing of paper, textiles, air and water filters, foam, metal screens

The Low Pressure Air Permeability Machine was developed by the National Institute of Standards and Technology of measuring the air permeability of textile type materials. and It is the acknowledged standard of the U.S. Government and the U.S. Textile Industry. The second model, High Pressure Air Permeability Machine is produced on the same principle as the Low Pressure Machine, but designed with a much greater versatility for use through its higher attainable airflow and differential pressure. Both models are extremely accurate and reliable, very easy to operate, and nearly maintenance free.

These machines were originally developed for measuring the air permeability of textile materials and are, in fact, the standard air permeability testing machines in the industry for quality control, research, development, performance and purchase specifications. It was quickly discovered that these machines are equally adaptable for measuring the air permeability with great accuracy and precision of any material that can be fitted to the physical dimensions of the machine. These materials include all fiber products such as paper, felt, nonwoven materials, filter’s and even wire cloth.

The New Frazier 2000TM Air Permeability Tester

The Frazier 2000TM is the next generation of Differential Pressure Air Permeability Instruments. This new instrument implements electronic pressure sensing as well as computerized logging and manipulation of the electronic measurements. The Frazier 2000TM brings a whole new era of reliability and productivity to the field of permeability testing and measurement. The Frazier 2000 TM has all the same features of the High Pressure Permeability Instrument.

Calibration of Air Permeability Instruments

The Differential Pressure Air Permeability Machines are exclusively calibrated by two separate methods for accuracy and reliability to insure that all permeability Machines are as identical as possible in their performance characteristics and accuracy. The calibrations include the procedures originally developed and recommended by the National Institute of Standards & Technology. In addition to the calibration, a test plate is provided to quickly and easily check individual machines and cross check between different machines and accuracy and reliability of the Permeability Machines. These test plates have been used successfully over 25 years by a Task Group of the ASTM Committee D-13 as an inter-laboratory comparison to verify the accuracy of the Air Permeability Machines.

These are instruments that measure permeability of substances, namely, units composed of manometers and electronic sensors that measure differential pressure to evaluate air flow, coolness, warmth, penetration of coatings, retention of additives, filter ability, water resistance, and denseness after use of samples, including, textiles, nonwovens, filters, fibrous materials, geofabrics, paper, slintered metals, wire cloth, architectural materials, plastic films, porous materials, clothing, breathing masks, protective equipment, automotive materials, rubber, leather, laminates, aerospace products, parachutes, and air bags.

Experience over many years of production and quality control has shown that these machines have not changed in their calibration values as long as there is no mechanical damage and the machines are kept clean and in good operating condition.

These machines are the most accurate available and work on the differential pressure principle as measured by manometers. Their accuracy, dependability, and simple operation are characteristics which resulted in their worldwide use in research, quality control, development, and testing for conformation with purchase and performance specifications.

Notes (#):

1. Air Permeability Tester w/ Computerized Data Collection

2. Used to Computerize Data Collection when added to any Model of Frazier Differential Pressure Air Permeability Tester

3. Special Order Frazier 2000 Sensors can extend range up to 200 inches; 5080 mm; 49816 pascals

4. Air Flow Range can be extended above and below specified ranges w/ special nozzles (9 standard nozzles included) - call for additional details

5. Often referred to as the "Frazier Number" or CFM

6. Proprietary Frazier calibration procedures give increased repeatability not available among non-Frazier testers

7. Dimensions of Electronic Unit

8. Standard units for instrument are inches of H2O and Cu. Ft./Sq. Ft./Minute (specify types of optional units needed for manually operated instruments)

9. Additional standard and user units can be easily set on computer operated units

10. Specs of Model HP with the addition of Model AR would be the same as Model A

11. When Model AR is added to Model LP, see Model LPAR Test Methods; When Model AR is added to Model HP, see Model A Test Methods

12. All models can be removed from table for portability or installed in laboratory casework or production lines

13. Test Methods (T#):

14. ASTM D737; (T2) ASTM F778; (T3) ASTM D1117; (T4) ASTM D461; (T5) ASTM C522; (T6) DART 70.0; (T7) Federal Test Method #191; (T8) Federal Test Method #5450

15. ASA No. L154.51; (T10) Tappi T251; (T11) IST 70.1-92; (T12) ISO 9237; (T13) DIN 53887; (T14) Edana 140.1-81; (T15) JIS L1096; (T16) ASTM D3574

16. There are many U.S. and worldwide standards that are based on the standards above - please call or email us if you have an air permeability standard that you need to use - we can let you know if our tester will perform the test.