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Air proof 37SI

Air proof tests on materials in Textile, Precision Acoustics, Building tents and other applications

Air proof tester 37SI to measure extremely low permeability of fabrics and automotive materials




Air proof tester 37SI is a testing instrument able to check and measure the lowest air passage of fabrics in Automotive applications

Branca Air proof 37SI is equipped with three special test areas with lateral sleeves to avoid any air leaks from the specimen tightening; the apparel allows to do the sampling of the material in multiple points of analyses and automatic measuring of low air passage samples showing results expressed in the measure units as Lt/min, Lt/h, Lt/m2/s or only a digital validation check of threshold overcoming.

  • 3 test areas of 100 cm2;

Manual or automatic pressure drop control from 0 to 2500 Pa through automation components commanded by a logic programmable unit.

HMI Touch screen with 5" display allows the user to do the parameters setting, test monitor, results savings and other auxiliary functions.

.csv files export through Webserver unit with serial RTU or TCP-IP communication and saved on SD card.

Thanks to the innovative technology applied to all models Air proof 37SI is able to analyze the exact air flow extremely low up to 0,01 Lt/min useful to analyze air proof materials and to find micro air leaks detected on sample surface in a very short time (5-10 sec/test).

  • Print out of test report through ASCII printer with the overall indication of company details, description of the material under examination, test results listing and operator signature.
  • Management software and statistical analyses evaluation.
Technical data:


[AIR FLOW RANGE] (Measure range): from 0,01 to 10 Lt/min;

  • 100 cm2

  • 50 cm2;
  • 20 cm2;
  • 10 cm2;
  • 5 cm2;
  • 2 cm2;


  • Impact or Thermal ASCII printer width of 57,5 mm, 24 columns, USB slot for serial communication;
  • Sleeve 100 cm2 to avoid lateral air leaks;
  • Reduction flange 50 cm2 for special materials;

  • Air-proof-tester-37SI
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